US2876932A - Liquid dispensing apparatus - Google Patents

Description

March 10, 1959 J. c. DAWSON ETAL 2,876,932

LIQUID DISPENSING APPARATUS Filed Jan. 23, 1956 2 Sheets-Sheet 1 FIGI.

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3 7\ 7 T 67 v 87 65 Q 9 H I 3 March 10, 1959 J. c. DAWSON ETAL 2,875,932

LIQUID DISPENSING APPARATUS Filed Jan. 25, 1956 2 Sheets-Sheet 2 LIQUID DISPENSING APPARATUS Joseph Carl Dawson, Ferguson, and Leland E.McQuilleu, Berkeley, Mo., assignors to Ferguson Fnmigants, Inc., St. Louis, Man, a corporation of Missouri Application January 23,1956, Serial No. 560,807

2 Claims. Cl. 222-70 This invention relates to liquid dispensing apparatus, and more particularly to apparatus for dispensing measured dosages of a liquid fumigant or the like.

Among the several objects of the invention may be noted the provision of portable apparatus for effectively and accurately dispensing small measured dosages of a liquid fumigant or the like, and more vparticularly a fumigant such as is disclosed in-U. S. Patent 2,606,857, for spot fumigation in cereal mills or the like; the provision of apparatus of this class wherein the dosage may be readily varied at will; and the provision of an elec- 'trically controlled apparatus of the class described which is economical to manufacture and reliable in operation. Other objects and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the constructions hereinafter described, the scope of the invention being indicated in the following claims.

in the accompanying drawings, in which one of various possible embodiments of the invention is illustrated,

Fig. 1 is a front elevation of a liquid dispensing apparatus of this invention;

Fig. 2 is a side elevation of Fig. 1;

Fig. 3 is an enlarged vertical section taken on line 3-3 of Fig. 1;

Fig. 4 is a plan of the apparatus with a top housing thereof removed; and,

Fig. 5 is a bottom plan of the apparatus with a bottom plate thereof removed.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings, a liquid dispensing apparatus of this invention is shown to comprise a portable support generally designated 1 in the form of a case having a carrying handle 3. The case includes a base portion 5 comprising a horizontal top plate 7, and vertical front and back walls 9 and 11 and vertical end walls 13 and 15 extending downward from the plate 7. This forms a compartment 17 which is closed at the bottom by a bottom cover plate 19 secured to inturned flanges 21 at the lower edges of the Walls 9 and 11. The bottom plate may be provided with rubber feet 23.

The case further comprises a top housing 25 having a front wall 27, a back wall 29, a top wall 31, and end walls 33. The end walls 33 extend below the lower edges of the front and back walls 27 and 29 on the outside of the end walls 13 and 15 of the base portion, and are secured thereto as indicated at 35.

A pressure regulator 37 is carried by the top plate 7 of the base 5. This has an inlet 39 and an outlet 41. It projects through an opening 43 in the plate 7, and has an adjusting screw 45 at the top for adjusting it to provide different liquid pressures. A flexible supply hose line 47 is connected to a fitting 49 at the back of the base portion. An elbow 51 connects the fitting 49 and the inlet 39 of the pressure regulator 37. At the 2,876,932 Fatented Mar. 10, 1959 outer end 'of the hose line 47 there is provided a check valve 53 (which opens in the direction of the arrow shown in Fig. 2), a cock 55 and a coupling 57 for connection to a source of liquid under pressure.

An elbow 59 is connected into the outlet 41 of the pressure regulator 37. A hose line 61 leads from this elbow 59 to an elbow 63 which is connected into a fitting 65. This fitting is mounted in an opening 67 in the plate '7 toward the front and at the center of plate 7. A panel 69 extends upward from the plate 7 at the front thereof. This occupies an opening 71 in the front wall 27 of the top housing 25. A pressure gage 73 is carried by the panel 69, and is connected to the fitting 65 as indicated at 75.

Carried by the plate 7 toward the opposite ends thereof are solenoid valves 77 and 79. A hose line 81 com nects the fitting 65 to the inlet 83 of valve 77 (which is the left-hand valve, as illustrated) via an elbow 85. A hose line 87 connects the fitting 65 to the inlet 89 of the other solenoid valve 79 via an elbow 91. A flexible delivery hose line 93 is connected to the outlet 95 of the solenoid valve 77 and extends outward through an opening 97 in the left-hand end wall 13 of the base 5. A flexible delivery hose line 99 is connected to the outlet 101 of the solenoid valve 79 and extends outward through an opening 103 in the right-hand end wall 15 of the base 5.

At the outer end of each of the delivery hose lines 93 and 99 is a manually operable valve 105. Each of these valves includes a pivoted operating lever 107. Ex-

' tending from the outlet of each valve is a delivery tube 109. Mounted on each valve 105 is a switch 111. This switch is open when valve 105 is closed, and is adapted to be closed by the lever 107 when the latter is operated to open the valve 105.

Mounted on the plate 7 toward opposite ends thereof are two electrical time switches 113 and 115. Each of these is of a conventional commercially obtainable type, such as an R-C circuit type, including contacts adapted to close upon energization of the switch and adapted to open upon elapse of the timing interval for which the switch is preset, and to be reconditioned automatically for initiation of another timing cycle upon deenergization. Each of the time switches includes an adjusting shaft 117 which is rotatable for presetting various timing intervals. These shafts extend through the panel 69 and have operating knobs 119 fixed on their outer ends. Rotatable with each of the knobs 119 is a time-interval indicating dial 121 which is read in conjunction with an index mark 123 on the panel 69.

The left-hand solenoid valve 77 is interconnected with the time switch 113 for control thereby via a cable 125. The right-hand solenoid valve 79 is interconnected with the time switch for control thereby via a cable 127. Means is provided for controlling the time switch 113 comprising a cable 129 extending along the hose line 93 having the switch 111 at the outer end of hose line 93 connected therein. The cable 129 has a plug 131 at its inner end plugged into a socket 133 in the left end Wall 13 of the base 5. Connections between the time switch 113 and the socket 133 are indicated at 135. Means is provided for controlling the time switch 115 comprising a cable 137 extending along the hose line 99 and having the switch 111 at the outer end of hose line 99 connected therein. The cable 137 has a plug 139 at its inner end plugged into a socket 141 in the right end wall 15 of the base 5. Connections between the time switch 115 and the socket 141 are indicated at 143. A power supply cord is indicated at 145. Connections from the cord 145 to the switches 113 and 115 are indicated at 147 and 149, respectively.

supply hose line thereto. The cock 55 is opened. For

using the hose line 93 for spot fumigation, the time switch 113 is preset by means of the knob 119 associated therewith for a timing interval corresponding to the amount of fumigant which it is desired to deliver. In a typical embodiment of the invention, the time switch provides for various intervals from one to ten seconds.

The tube 109 at the outer end of hose line 93 is inserted in an opening in the wall of the equipment to be fumigated, and the lever 107 of the valve 105 at the end of hose line 103 is pressed to open this valve 105 and to.

close the associated switch 111. This energizes the time switch 113 to cause it to close and thereby energize the solenoid valve 77. to cause it to open, and to initiate a timing .cycle. Fumigant is thereupon delivered through the hose line 93 and the opened valve 105 at the end of line 93, at a pressure determined by the pressure regulator 37. Delivery continuous for the timing interval for which the time switch has been preset. Then the time switch opens to deenergize the solenoid valve 77, which thereupon closes to cut oif flow. The time switch is automatically reconditioned for initiating another timing cycle upon release of the lever 107 to open switch 111. The operations involved in using the other delivery hose line 99 are the same, except, of course, that delivery via line 99 is under control of the time switch 115 and solenoid valve 79. I

It will be understood that the apparatus of this invention may be used in conjunction with a portable tank of fumigant instead of as above described. For example, the apparatus may be mounted on a wheeled support carrying a pressurized tank of fumigant. The pressure for the fumigant may be obtained from a source of compressed air, regulator 37 being omitted.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and notin a limiting sense.

We claim:

1. Apparatus for dispensing measured dosages of a liquid fumigant comprising a case adapted to be carried by hand having a base and front, back, end and top walls, a carrying handle on the top wall for carrying the case from place to place, a liquid pressure regulator in the case having an inlet and an outlet, a flexible supply hose 4 I line connected at one end to the regulator inlet extending out from the case and having a coupling at its outer end for connection to a source of liquid fumigant under pressure, a solenoid valve in the case having an inlet and an outlet, said solenoid valve being adapted to open on being electrically energized and to close upon being deenergized, a connection in the case between the regulator outlet and the solenoid valve inlet, a pressure gauge on the front wall of the case in communication with the connection between the regulator outlet and solenoid valve inlet, a flexible delivery hose line leading out of the case from the solenoid valve outlet, a manually operable valve at the outer end of the delivery hose line having a pivoted operating lever, an electrical time switch in the case adapted to close upon energization thereof and adapted to open upon elapse of the timing interval for which it is preset, said time switch having means extending out of the front wall ofthe. case for presettingvarious timing intervals, said solenoid valve being interconnected with said time switch for control thereby, and means for controlling said time switch comprising a cable extending from the case along the delivery hose line and having a switch connected therein carried by the manually operable valve and operable by said lever.

2. Apparatus for dispensing measured dosages of a liquid fumigant comprising a case adapted to be manually transported from place to place and having a base and front, back, end and top walls, a handle associated with the case for transporting the case from place to place, a solenoid valve in the case having an inlet and an outlet, said solenoid valve being adapted to open on being electrically energized and to close upon being deenergized, means extending from the solenoid valve inlet out of the case for connection to a source of liquid fumigant under pressure, means for regulating the pressure of liquid fumigant supplied to said solenoid valve inlet, a flexible delivery hose line leading out of the case from the solenoid valve outlet, a manually operable valve at the outer end of the delivery hose line having a pivoted operating lever, an electrical time switch in the case adapted to close upon energization thereof and adapted to open upon elapse of the timing interval for which it is preset, said time switch having means extending out of one wall of the case for presetting various timing intervals, said solenaid valve being interconnected with said time switch for control thereby, and means for controlling said time switch comprising a cable extending from the case along 'the delivery hose line and having a switch connected therein carried by the manually operable valve and operable by said lever.

References Cited in the file of this patent UNITED STATES PATENTS 1,808,804 Baldner et al. June 9, 1931 1,953,393 Carter Apr. 3, 1934 2,709,546 Shore May 31, 1955

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