CA2307660A1 - Liquid injection system for sprayers - Google Patents
Liquid injection system for sprayers Download PDFInfo
- Publication number
- CA2307660A1 CA2307660A1 CA002307660A CA2307660A CA2307660A1 CA 2307660 A1 CA2307660 A1 CA 2307660A1 CA 002307660 A CA002307660 A CA 002307660A CA 2307660 A CA2307660 A CA 2307660A CA 2307660 A1 CA2307660 A1 CA 2307660A1
- Authority
- CA
- Canada
- Prior art keywords
- pressure volume
- rod
- high pressure
- low pressure
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
- B05B9/0413—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with reciprocating pumps, e.g. membrane pump, piston pump, bellow pump
Abstract
The present invention is directed to a system for direct injection of chemicals or other additives in a liquid solution into a spray nozzle (35). The injection system of the present invention may be mounted adjacent, or in close proximity, to the spray nozzles of a sprayer. The present invention comprises a variable speed/stroke diaphragm pump (12) capable of providing a double pumping action such that a liquid solution may be continuously pumped at a controllable rate to one or more spray nozzles (35) of a sprayer.
Description
w0 99/21791 PCT/US98122107 TITLE: LIQUID INJECTION SYSTEM FOR SPRAYERS
BACKGROUND OF THE INVENTION
1. Field of The Invention The present invention is directed to a system for direct injection of chemicals or other additives in a liquid solution into a spray nozzle. The injection system of the present invention may be mounted adjacent, or in close proximity, to the spray nozzles of a sprayer. The present invention comprises a variable speed /stroke diaphragm pump capable of providing a double pumping action such that a liquid solution may be continuously pumped at a controllable rate to one or more spray nozzles of a sprayer.
BACKGROUND OF THE INVENTION
1. Field of The Invention The present invention is directed to a system for direct injection of chemicals or other additives in a liquid solution into a spray nozzle. The injection system of the present invention may be mounted adjacent, or in close proximity, to the spray nozzles of a sprayer. The present invention comprises a variable speed /stroke diaphragm pump capable of providing a double pumping action such that a liquid solution may be continuously pumped at a controllable rate to one or more spray nozzles of a sprayer.
2. Description of the Prior Art Traditional agricultural spray systems require the mixing of agrochemical formulation with a water carrier in a sprayer tank. Traditional sprayers pump the mixture of chemical and water to the boom and out through spray nozzles. Errors in chemical measurement, mixing, and calibration, result in increasingly burdensome problems regarding to the disposal of leftover tank mixes, which are frequently considered to be hazardous wastes. Additionally stringent worker protection standards regarding potential exposure to chemicals and accountability standards for disposal of chemicals provide drawbacks which discourage the use of traditional sprayers.
Another approach to agrochemical spraying is direct chemical injection. Direct chemical injection provides benefits of reduced worker exposure, accurate chemical dispensing, reduced waste disposal, and adaptability to variable rate applications. Presently available direct injection systems inject the chemical near the pump or into a spray line that is not located in close proximity to the spray nozzle. A time delay, results between the point of injection and the point of nozzle output. This delay is a problem when trying to match variable chemical rates with particular locations in an agricultural field from a moving sprayer. It is customary for agrochemical boom sprayers to move at velocities from 4-i 8 mph.
Another problem associated with prior art direct injection systems is their inability to accurately meter the low flow rates associated with agrochemical spraying. Typical application rates for new agrochemical chemistries are as low as 2 ounces per acre. The use of orifices to restrict flow rates for agrochemical mixtures is limited because orifices of diameters less than 0.03 inches inheritantly plug up with formulation debris.
Additionally, the regulation of pressures below 10 psi is difficult due to regulator drift. Thus, traditional means of using pressure regulation across orifices to control flow rate have been less than satisfactory with the low flow rate requirements for agrochemical applications.
The present invention provides an apparatus capable of injecting chemicals or other additives in a liquid solution into a spray nozzle at a controllable variable rate for flow rates as low as 1 ml/min. This flow rate WO 99!21791 PCT/US98/22107 corresponds to an application rate of approximately 2 ounces peg acre for a boom sprayer moving at 5 mph and comprising a 20 inch nozzle spacing.
The design of the present invention permits the injection pump to be placed very close to the outlet spray device or spray nozzle, thereby avoiding time S delay problems associated with prior art devices. This invention has many varied applications, including but not limited to, agricultural spraying, food processing and liquid fuel delivery.
SUMMARY OF THE INVENTION
The present invention is directed towards a liquid injection system comprising a housing with a high pressure volume and a iow pressure volume. A flexible diaphragm is mounted within the housing so as to separate the high pressure volume from the low pressure volume.
The invention further comprises a rod extending through the housing at a substantially right angle to the diaphragm. The rod is attached to the diaphragm such that when the rod reciprocates it displaces the diaphragm in the direction of rod travel so as to pressurize the high pressure volume and to depressurize the low pressure volume.
The invention further comprises a first inlet line and a first outlet line connected to the high pressure volume and a second inlet fine and second outlet line connected to the low pressure volume. A check valve is positioned in each inlet line so as to permit liquid to flow into the high pressure or low pressure volume. A check valve is position in each outlet line so as to permit liquid to flow out of the high pressure and low pressure volumes.
A motor is coupled to the rod so as to cause the rod to reciprocate when the motor is energized. A motor controller is coupled to the motor.
The controller is capable of controlling the frequency and/or stroke of reciprocation of the rod. An outlet spray device is connected to the first and second outlet lines from the housing.
DESCRIPTION OF THE DRAWINGS
Figure 1 a is a cross sectional view of the pump of the present invention when the rod is in the up stroke position.
Figure 1 b is a cross sectional view of the pump of the present invention when the rod is in the down stroke position.
Figure 2a is a block diagram of a first embodiment of the present invention.
Figure 2b is a block diagram of a second embodiment of the present invention.
Figure 2c is a side view of a third embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention comprises a housing 14 comprising a high pressure volume 16 and a low pressure volume 18, as shown in Figures 1 a-1 b. In a preferred embodiment, the housing is made from plastic.
Another approach to agrochemical spraying is direct chemical injection. Direct chemical injection provides benefits of reduced worker exposure, accurate chemical dispensing, reduced waste disposal, and adaptability to variable rate applications. Presently available direct injection systems inject the chemical near the pump or into a spray line that is not located in close proximity to the spray nozzle. A time delay, results between the point of injection and the point of nozzle output. This delay is a problem when trying to match variable chemical rates with particular locations in an agricultural field from a moving sprayer. It is customary for agrochemical boom sprayers to move at velocities from 4-i 8 mph.
Another problem associated with prior art direct injection systems is their inability to accurately meter the low flow rates associated with agrochemical spraying. Typical application rates for new agrochemical chemistries are as low as 2 ounces per acre. The use of orifices to restrict flow rates for agrochemical mixtures is limited because orifices of diameters less than 0.03 inches inheritantly plug up with formulation debris.
Additionally, the regulation of pressures below 10 psi is difficult due to regulator drift. Thus, traditional means of using pressure regulation across orifices to control flow rate have been less than satisfactory with the low flow rate requirements for agrochemical applications.
The present invention provides an apparatus capable of injecting chemicals or other additives in a liquid solution into a spray nozzle at a controllable variable rate for flow rates as low as 1 ml/min. This flow rate WO 99!21791 PCT/US98/22107 corresponds to an application rate of approximately 2 ounces peg acre for a boom sprayer moving at 5 mph and comprising a 20 inch nozzle spacing.
The design of the present invention permits the injection pump to be placed very close to the outlet spray device or spray nozzle, thereby avoiding time S delay problems associated with prior art devices. This invention has many varied applications, including but not limited to, agricultural spraying, food processing and liquid fuel delivery.
SUMMARY OF THE INVENTION
The present invention is directed towards a liquid injection system comprising a housing with a high pressure volume and a iow pressure volume. A flexible diaphragm is mounted within the housing so as to separate the high pressure volume from the low pressure volume.
The invention further comprises a rod extending through the housing at a substantially right angle to the diaphragm. The rod is attached to the diaphragm such that when the rod reciprocates it displaces the diaphragm in the direction of rod travel so as to pressurize the high pressure volume and to depressurize the low pressure volume.
The invention further comprises a first inlet line and a first outlet line connected to the high pressure volume and a second inlet fine and second outlet line connected to the low pressure volume. A check valve is positioned in each inlet line so as to permit liquid to flow into the high pressure or low pressure volume. A check valve is position in each outlet line so as to permit liquid to flow out of the high pressure and low pressure volumes.
A motor is coupled to the rod so as to cause the rod to reciprocate when the motor is energized. A motor controller is coupled to the motor.
The controller is capable of controlling the frequency and/or stroke of reciprocation of the rod. An outlet spray device is connected to the first and second outlet lines from the housing.
DESCRIPTION OF THE DRAWINGS
Figure 1 a is a cross sectional view of the pump of the present invention when the rod is in the up stroke position.
Figure 1 b is a cross sectional view of the pump of the present invention when the rod is in the down stroke position.
Figure 2a is a block diagram of a first embodiment of the present invention.
Figure 2b is a block diagram of a second embodiment of the present invention.
Figure 2c is a side view of a third embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention comprises a housing 14 comprising a high pressure volume 16 and a low pressure volume 18, as shown in Figures 1 a-1 b. In a preferred embodiment, the housing is made from plastic.
A flexible diaphragm 12 is mounted within the housing so as to separate the high pressure volume from the low pressure volume as shown in Figures 1 a -1 b. In one preferred embodiment the diaphragm comprises a synthetic resin comprising fluorine, such as that sold under the trademark Teflon.
In another preferred embodiment, the diaphragm comprises a center layer made from a flexible metal or from a polymer such as that sold under the trademark Kevlar~. The center layer has a top surface and a bottom surface. This embodiment of the diaphragm further comprises a top outer layer made from a synthetic resin comprising fluorine, such as that sold under the trademark Teflon~ and placed against the top surface of the center layer and a bottom outer layer made from a synthetic resin comprising fluorine and placed against the bottom surface of the center layer.
A rod 10 extends through the housing at a substantially right angle to the diaphragm as shown in Figures 1 a-1 b. In a preferred embodiment, the rod is made from plastic, stainless steel or nylon. The rod is attached to the diaphragm such that when the rod reciprocates it displaces the diaphragm in the direction of rod travel sa as to pressurize the high pressure volume and to depressure the low pressure volume. The housing, flexible diaphragm, and rod make up an injection pump used in the liquid injection system of the present invention.
The pump of the present invention is shown in the ~up stroke"
In another preferred embodiment, the diaphragm comprises a center layer made from a flexible metal or from a polymer such as that sold under the trademark Kevlar~. The center layer has a top surface and a bottom surface. This embodiment of the diaphragm further comprises a top outer layer made from a synthetic resin comprising fluorine, such as that sold under the trademark Teflon~ and placed against the top surface of the center layer and a bottom outer layer made from a synthetic resin comprising fluorine and placed against the bottom surface of the center layer.
A rod 10 extends through the housing at a substantially right angle to the diaphragm as shown in Figures 1 a-1 b. In a preferred embodiment, the rod is made from plastic, stainless steel or nylon. The rod is attached to the diaphragm such that when the rod reciprocates it displaces the diaphragm in the direction of rod travel sa as to pressurize the high pressure volume and to depressure the low pressure volume. The housing, flexible diaphragm, and rod make up an injection pump used in the liquid injection system of the present invention.
The pump of the present invention is shown in the ~up stroke"
condition in Figure 1 a. As shown in Figure 1 a, the diaphragm is displaced in the direction of rod travel. The high pressure volume is the region of the housing above the diaphragm. The low pressure volume is the region of the housing below the diaphragm. The displacement of the diaphragm causes the high pressure volume to be pressurized while at the same time producing a suction or depressurization in the low pressure volume.
In Figure 1 b the pump of the present invention is shown in the "downstroke" condition. In this condition, the locations of the high pressure volume and low pressure volume are reversed from that shown in the up stroke condition depicted in Figure 1 a.
The invention further comprises a first inlet line 20 connected to the high pressure volume and a first outlet line 22 connected to the high pressure volume. A second inlet line 24 is connected to the low pressure volume and a second outlet line 26 is connected to the low pressure volume.
Check valves 28a and 28b are positioned in the first and second inlet fines, respectively, so as to permit liquid flow into the high pressure or low pressure volumes, as shown by the arrows in Figures 1 a-1 b. Check valves 28c -28d are positioned in the first and second outlet lines, respectively, so as to permit liquid flow out of the high pressure and low pressure volumes, as shown by the arrows in Figures 1 a-1 b. In a preferred embodiment, the check valves comprise a ball 27 and a seat 29.
A motor 30 is coupled to the rod so as to cause the rod to reciprocate when the motor is energized, as shown in Figures 2a - 2c. In one preferred embodiment, the motor is a stepper motor. In another preferred embodiment, the motor is a variable speed motor. Variable speed motors may be electric, pneumatic or hydraulic. Variable speed motors may comprise rotary or linear drives.
A motor controller 32 is coupled to the motor as shown in Figures 2a-2c. The motor controller is capable of controlling the frequency andlor stroke of rod reciprocation. Variable flow control is achieved with the present invention by controllably varying the rod stroke and/or frequency.
An outlet spray device 34 is connected to the first and second outlet lines, as shown in Figures 2a-2c. The injection pump of the present invention may be placed adjacent, or in close proximity, to the outlet spray device.
In one preferred embodiment, the outlet spray device comprises a mixing chamber 33 connected to the first and second outlet lines, and a spray nozzle 35 connected to the mixing chamber as shown in Figure 2b.
In another preferred embodiment, the invention further comprises a boom header 36 connected to one or more mixing chambers as shown in Figure 2c. In another preferred embodiment, an outlet spray header 41 is connected to the first and second outlet lines, as shown in Figure 2b. In a preferred embodiment, a strainer 48 is mounted in each mixing chamber, as shown in Figures 2b and 2c.
In Figure 1 b the pump of the present invention is shown in the "downstroke" condition. In this condition, the locations of the high pressure volume and low pressure volume are reversed from that shown in the up stroke condition depicted in Figure 1 a.
The invention further comprises a first inlet line 20 connected to the high pressure volume and a first outlet line 22 connected to the high pressure volume. A second inlet line 24 is connected to the low pressure volume and a second outlet line 26 is connected to the low pressure volume.
Check valves 28a and 28b are positioned in the first and second inlet fines, respectively, so as to permit liquid flow into the high pressure or low pressure volumes, as shown by the arrows in Figures 1 a-1 b. Check valves 28c -28d are positioned in the first and second outlet lines, respectively, so as to permit liquid flow out of the high pressure and low pressure volumes, as shown by the arrows in Figures 1 a-1 b. In a preferred embodiment, the check valves comprise a ball 27 and a seat 29.
A motor 30 is coupled to the rod so as to cause the rod to reciprocate when the motor is energized, as shown in Figures 2a - 2c. In one preferred embodiment, the motor is a stepper motor. In another preferred embodiment, the motor is a variable speed motor. Variable speed motors may be electric, pneumatic or hydraulic. Variable speed motors may comprise rotary or linear drives.
A motor controller 32 is coupled to the motor as shown in Figures 2a-2c. The motor controller is capable of controlling the frequency andlor stroke of rod reciprocation. Variable flow control is achieved with the present invention by controllably varying the rod stroke and/or frequency.
An outlet spray device 34 is connected to the first and second outlet lines, as shown in Figures 2a-2c. The injection pump of the present invention may be placed adjacent, or in close proximity, to the outlet spray device.
In one preferred embodiment, the outlet spray device comprises a mixing chamber 33 connected to the first and second outlet lines, and a spray nozzle 35 connected to the mixing chamber as shown in Figure 2b.
In another preferred embodiment, the invention further comprises a boom header 36 connected to one or more mixing chambers as shown in Figure 2c. In another preferred embodiment, an outlet spray header 41 is connected to the first and second outlet lines, as shown in Figure 2b. In a preferred embodiment, a strainer 48 is mounted in each mixing chamber, as shown in Figures 2b and 2c.
The present invention may be used to inject a chemical mixture from a inlet tank to the outlet spray device. In a preferred embodiment of the present invention, an inlet tank 40 is connected to the first and second Inlet lines, as shown in Figure 2a. In another preferred embodiment, a diluent header 44 is connected to each mixing chamber and a diluent tank 46 is connected to the diluent header, as shown in Figure 2b.
In another preferred embodiment, a boom header 36 Is connected to the first and second outlet lines and at least two mixing chambers are connected to the boom header as shown in Figure 2c. A spray nozzle 35 is connected to each of the mixing chambers. In a preferred embodiment the spray nozzle comprises a device capable of causing turbulent mixing of the fluid being sprayed 50, referred to as a "turbulent mixer". Turbulent mixers may comprise orifices 52 and venturis 54, impact surfaces 56, and/or air inlet ports 58. When the fluid flows through orifice 52 into venturi 54 a suction is created at air inlet ports 58, as shown in Figure 2c. This suction results in the turbulent mixing of air and fluid in the turbulent mixer.
The foregoing disclosure and description of the invention are illustrative and explanatory thereof, and various changes in the size, shape and materials, as well as in the details of the illustrated construction, may be made without departing from the spirit of the invention.
In another preferred embodiment, a boom header 36 Is connected to the first and second outlet lines and at least two mixing chambers are connected to the boom header as shown in Figure 2c. A spray nozzle 35 is connected to each of the mixing chambers. In a preferred embodiment the spray nozzle comprises a device capable of causing turbulent mixing of the fluid being sprayed 50, referred to as a "turbulent mixer". Turbulent mixers may comprise orifices 52 and venturis 54, impact surfaces 56, and/or air inlet ports 58. When the fluid flows through orifice 52 into venturi 54 a suction is created at air inlet ports 58, as shown in Figure 2c. This suction results in the turbulent mixing of air and fluid in the turbulent mixer.
The foregoing disclosure and description of the invention are illustrative and explanatory thereof, and various changes in the size, shape and materials, as well as in the details of the illustrated construction, may be made without departing from the spirit of the invention.
Claims (20)
1. A liquid injection system comprising:
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet fine connected to said high pressure volume;
e. a first outlet line connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i, a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod; and l. an outlet spray device connected said first and said outlet lines.
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet fine connected to said high pressure volume;
e. a first outlet line connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i, a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod; and l. an outlet spray device connected said first and said outlet lines.
2. The system of claim 1, wherein said rod is made from plastic.
3. The system of claim 1, wherein each of said check valves comprises a ball and a seat.
4. The system of claim 1, wherein said motor is a stepper motor.
5. The system of claim 1, wherein said motor is a variable speed motor.
6. The system of claim 1, wherein said outlet spray device comprises:
a. a mixing chamber connected to said first and second outlet lines; and b. a spray nozzle connected to said mixing chamber.
a. a mixing chamber connected to said first and second outlet lines; and b. a spray nozzle connected to said mixing chamber.
7. The system of claim 6, further comprising a boom header connected to said mixing chamber.
8. The system of claim 7, further comprising an inlet tank connected to said first and second inlet lines.
9. The system of claim 1, wherein said outlet spray device comprises:
a. a boom header connected to said first and second outlet lines;
b. at least two mixing chambers connected to said boom header;
and c. a spray nozzle connected to each of said mixing chambers.
a. a boom header connected to said first and second outlet lines;
b. at least two mixing chambers connected to said boom header;
and c. a spray nozzle connected to each of said mixing chambers.
10. The system of claim 1, wherein said diaphragm comprises a synthetic resin comprising fluorine.
11. The system of claim 1 wherein said spray nozzle comprises a turbulent mixer.
12. A liquid injection system comprising:
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet line connected to said high pressure volume;
e. a first outlet line connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i. a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod;
l. an outlet spray header connected to said first and second outlet lines;
m. at least two mixing chambers connected to said outlet spray header; and n. a spray nozzle connected to each of said mixing chambers.
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet line connected to said high pressure volume;
e. a first outlet line connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i. a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod;
l. an outlet spray header connected to said first and second outlet lines;
m. at least two mixing chambers connected to said outlet spray header; and n. a spray nozzle connected to each of said mixing chambers.
13. The system of claim 12 further comprising an inlet tank connected to said first and second inlet lines.
14. The system of claim 13 further comprising a diluent header connected to each of said mixing chambers.
15. The system of claim 14 further comprising a diluent tank connected to said diluent header.
16. The system of claim 15 further comprising a strainer in each of said mixing chambers.
17. A liquid injection system comprising:
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet line connected to said high pressure volume;
e. a first outlet sine connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i. a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod;
l, a mixing chamber connected to said first and second outlet lines; and m. a spray nozzle connected to said mixing chamber.
a. a housing comprising a high pressure volume and a low pressure volume;
b. a flexible diaphragm mounted within said housing so as to separate said high pressure volume from said low pressure volume;
c. a rod extending through said housing at a substantially right angle to said diaphragm, said rod being attached to said diaphragm such that when said rod reciprocates it displaces said diaphragm in the direction of rod travel so as to pressurize said high pressure volume and to depressurize said low pressure volume;
d. a first inlet line connected to said high pressure volume;
e. a first outlet sine connected to said high pressure volume;
f. a second inlet line connected to said low pressure volume;
g. a second outlet line connected to said low pressure volume;
h. a check valve positioned in each of said inlet lines so as to permit liquid to flow into said high pressure or low pressure volume;
i. a check valve positioned in each of said outlet lines so as to permit liquid to flow out of said high pressure or low pressure volume;
j. a motor coupled to said rod so as to cause said rod to reciprocate when said motor is energized;
k. a motor controller coupled to said motor, said controller being capable of controlling the frequency or stroke of the reciprocation of said rod;
l, a mixing chamber connected to said first and second outlet lines; and m. a spray nozzle connected to said mixing chamber.
18. The system of claim 17 further comprising a boom header connected to said mixing chamber.
19. The system of claim 17 wherein said motor is a variable speed motor.
20. The system of claim 17, wherein said spray nozzle comprises a turbulent mixer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/959,419 | 1997-10-28 | ||
| US08/959,419 US5881919A (en) | 1997-10-28 | 1997-10-28 | Liquid injection system for sprayers |
| PCT/US1998/022107 WO1999021791A1 (en) | 1997-10-28 | 1998-10-20 | Liquid injection system for sprayers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2307660A1 true CA2307660A1 (en) | 1999-05-06 |
Family
ID=25502034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002307660A Abandoned CA2307660A1 (en) | 1997-10-28 | 1998-10-20 | Liquid injection system for sprayers |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5881919A (en) |
| EP (1) | EP1042216A1 (en) |
| AR (1) | AR015988A1 (en) |
| AU (1) | AU735292B2 (en) |
| CA (1) | CA2307660A1 (en) |
| WO (1) | WO1999021791A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772436B1 (en) * | 1997-12-16 | 2000-01-21 | Centre Nat Etd Spatiales | POSITIVE DISPLACEMENT PUMP |
| US7850401B1 (en) | 2000-01-18 | 2010-12-14 | Hamblet Jr Tracy E | Method for stabilizing soil against erosion |
| ES2195717B1 (en) * | 2001-03-22 | 2005-03-01 | Anjus2, S.L. | DOSAGE SYSTEM AND DIRECT INJECTION OF ACTIVE MATERIALS FOR PHYTOSANITARY PRODUCT APPLICATORS. |
| US7311004B2 (en) * | 2003-03-10 | 2007-12-25 | Capstan Ag Systems, Inc. | Flow control and operation monitoring system for individual spray nozzles |
| US20060043211A1 (en) * | 2004-08-26 | 2006-03-02 | Nelson William R | System for cleaning and sanitizing |
| US7775966B2 (en) | 2005-02-24 | 2010-08-17 | Ethicon Endo-Surgery, Inc. | Non-invasive pressure measurement in a fluid adjustable restrictive device |
| US8016744B2 (en) | 2005-02-24 | 2011-09-13 | Ethicon Endo-Surgery, Inc. | External pressure-based gastric band adjustment system and method |
| US7658196B2 (en) | 2005-02-24 | 2010-02-09 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device orientation |
| US7699770B2 (en) | 2005-02-24 | 2010-04-20 | Ethicon Endo-Surgery, Inc. | Device for non-invasive measurement of fluid pressure in an adjustable restriction device |
| US7775215B2 (en) | 2005-02-24 | 2010-08-17 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device positioning and obtaining pressure data |
| US8066629B2 (en) | 2005-02-24 | 2011-11-29 | Ethicon Endo-Surgery, Inc. | Apparatus for adjustment and sensing of gastric band pressure |
| US7927270B2 (en) | 2005-02-24 | 2011-04-19 | Ethicon Endo-Surgery, Inc. | External mechanical pressure sensor for gastric band pressure measurements |
| US7278294B2 (en) * | 2005-04-12 | 2007-10-09 | Durham Kenimer Giles | System and method for determining atomization characteristics of spray liquids |
| US8250907B2 (en) * | 2005-04-12 | 2012-08-28 | Durham Kenimer Giles | System and method for determining atomization characteristics of spray liquids |
| US7502665B2 (en) * | 2005-05-23 | 2009-03-10 | Capstan Ag Systems, Inc. | Networked diagnostic and control system for dispensing apparatus |
| US20060273189A1 (en) | 2005-06-07 | 2006-12-07 | Capstan Ag Systems, Inc. | Electrically actuated variable pressure control system |
| US8870742B2 (en) | 2006-04-06 | 2014-10-28 | Ethicon Endo-Surgery, Inc. | GUI for an implantable restriction device and a data logger |
| US8152710B2 (en) | 2006-04-06 | 2012-04-10 | Ethicon Endo-Surgery, Inc. | Physiological parameter analysis for an implantable restriction device and a data logger |
| US8187163B2 (en) | 2007-12-10 | 2012-05-29 | Ethicon Endo-Surgery, Inc. | Methods for implanting a gastric restriction device |
| US8100870B2 (en) | 2007-12-14 | 2012-01-24 | Ethicon Endo-Surgery, Inc. | Adjustable height gastric restriction devices and methods |
| US8377079B2 (en) | 2007-12-27 | 2013-02-19 | Ethicon Endo-Surgery, Inc. | Constant force mechanisms for regulating restriction devices |
| US8142452B2 (en) | 2007-12-27 | 2012-03-27 | Ethicon Endo-Surgery, Inc. | Controlling pressure in adjustable restriction devices |
| US8337389B2 (en) | 2008-01-28 | 2012-12-25 | Ethicon Endo-Surgery, Inc. | Methods and devices for diagnosing performance of a gastric restriction system |
| US8591395B2 (en) | 2008-01-28 | 2013-11-26 | Ethicon Endo-Surgery, Inc. | Gastric restriction device data handling devices and methods |
| US8192350B2 (en) | 2008-01-28 | 2012-06-05 | Ethicon Endo-Surgery, Inc. | Methods and devices for measuring impedance in a gastric restriction system |
| US8221439B2 (en) | 2008-02-07 | 2012-07-17 | Ethicon Endo-Surgery, Inc. | Powering implantable restriction systems using kinetic motion |
| US7844342B2 (en) | 2008-02-07 | 2010-11-30 | Ethicon Endo-Surgery, Inc. | Powering implantable restriction systems using light |
| US8114345B2 (en) | 2008-02-08 | 2012-02-14 | Ethicon Endo-Surgery, Inc. | System and method of sterilizing an implantable medical device |
| US8057492B2 (en) | 2008-02-12 | 2011-11-15 | Ethicon Endo-Surgery, Inc. | Automatically adjusting band system with MEMS pump |
| US8591532B2 (en) | 2008-02-12 | 2013-11-26 | Ethicon Endo-Sugery, Inc. | Automatically adjusting band system |
| US8034065B2 (en) | 2008-02-26 | 2011-10-11 | Ethicon Endo-Surgery, Inc. | Controlling pressure in adjustable restriction devices |
| US8233995B2 (en) | 2008-03-06 | 2012-07-31 | Ethicon Endo-Surgery, Inc. | System and method of aligning an implantable antenna |
| US8187162B2 (en) | 2008-03-06 | 2012-05-29 | Ethicon Endo-Surgery, Inc. | Reorientation port |
| BR112014020122A2 (en) * | 2012-02-14 | 2019-09-24 | Gojo Ind Inc | dispensing pump, foaming method, and refill unit for a two-fluid foam dispenser |
| US9113591B2 (en) | 2012-06-18 | 2015-08-25 | Raven Industries, Inc. | Implement for adjustably metering an agricultural field input according to different frame sections |
| US9655479B2 (en) | 2013-01-15 | 2017-05-23 | Gojo Industries, Inc. | Two-liquid dispensing systems, refills and two-liquid pumps |
| US11160204B2 (en) | 2013-03-15 | 2021-11-02 | Raven Industries, Inc. | Localized product injection system for an agricultural sprayer |
| BR112015031479A2 (en) * | 2013-06-10 | 2017-07-25 | Raven Ind Inc | localized product injection system for an agricultural sprayer |
| US10125002B2 (en) * | 2014-07-13 | 2018-11-13 | Sestra Systems, Inc | Beverage dispensing system |
| US10058879B2 (en) | 2015-10-29 | 2018-08-28 | Capstan Ag Systems, Inc. | System and methods for estimating fluid flow based on valve closure time |
| MX2019013090A (en) * | 2017-05-03 | 2020-01-30 | Basf Coatings Gmbh | Pump assembly for pumping viscous media, device comprising same, method for producing surface coating agents, and use of a pump assembly. |
| WO2019028345A1 (en) | 2017-08-03 | 2019-02-07 | Capstan Ag Systems, Inc. | System and methods for operating a solenoid valve |
| US10953423B2 (en) | 2018-04-23 | 2021-03-23 | Capstan Ag Systems, Inc. | Fluid dispensing apparatus including phased valves and methods of dispensing fluid using same |
| US11506228B2 (en) | 2018-09-25 | 2022-11-22 | Capstan Ag Systems, Inc. | System and method for energizing a solenoid coil for fast solenoid actuation |
| US11612160B2 (en) | 2019-10-04 | 2023-03-28 | Raven Industries, Inc. | Valve control system and method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2736466A (en) * | 1950-10-11 | 1956-02-28 | Joseph J Rodth | Liquid metering and dispensing device |
| US2675946A (en) * | 1951-04-02 | 1954-04-20 | Edward L Strempel | Fluid measuring and dispensing means |
| US3033218A (en) * | 1959-09-21 | 1962-05-08 | Fairchild Stratos Corp | Fluid proportioner |
| US3552606A (en) * | 1967-12-11 | 1971-01-05 | Beverage Air Co | Liquid metering dispenser |
| US4137020A (en) * | 1976-12-26 | 1979-01-30 | Nippondenso Co., Ltd. | Diaphragm type air pump |
| US5121855A (en) * | 1986-07-18 | 1992-06-16 | The Coca-Cola Company | Beverage dispenser system using volumetric ratio control device |
| US4953754A (en) * | 1986-07-18 | 1990-09-04 | The Coca-Cola Company | Beverage dispenser system using volumetric ratio control device |
| US4966306A (en) * | 1986-07-18 | 1990-10-30 | The Coca-Cola Company | Beverage dispenser system using volumetric ratio control device |
| US5381926A (en) * | 1992-06-05 | 1995-01-17 | The Coca-Cola Company | Beverage dispensing value and method |
-
1997
- 1997-10-28 US US08/959,419 patent/US5881919A/en not_active Expired - Fee Related
-
1998
- 1998-10-20 WO PCT/US1998/022107 patent/WO1999021791A1/en not_active Application Discontinuation
- 1998-10-20 AU AU15181/99A patent/AU735292B2/en not_active Ceased
- 1998-10-20 EP EP98959367A patent/EP1042216A1/en not_active Withdrawn
- 1998-10-20 CA CA002307660A patent/CA2307660A1/en not_active Abandoned
- 1998-10-27 AR ARP980105380A patent/AR015988A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AR015988A1 (en) | 2001-05-30 |
| AU735292B2 (en) | 2001-07-05 |
| AU1518199A (en) | 1999-05-17 |
| US5881919A (en) | 1999-03-16 |
| EP1042216A1 (en) | 2000-10-11 |
| WO1999021791A1 (en) | 1999-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |