US2741997A - Water jet pump - Google Patents

Description

O. A. PARKER WATER JET PUMP April 17, 1956 Filed Jan.' 12, 1955 INVENTOR. 012451. A. AR/(ER United States Patent O WATER JET PUMP Orrel A. Parker, Shaker Heights, Ohio Application January 12, 1955, Serial No. 481,322 Claims. (Cl. 103-262) The present invention is an improved water jet pump which, in general respects, is similar to the one that constitutes the subject matter of Letters Patent No. 2,215,132, granted to me on September 17, 1940.

a My present invention, like its predecessor, is used in conjunction with a garden hose for administering a liquid treatment to lawns and other such areas in the customary act of sprinkling, and it is adapted to be interposed between a water supply, such as a faucet, and the hose, and to have communicative connection, through a hose ofsmaller diameter and shorter length, with a container that holds a supply of the liquid treatment in highly concentrated form. The treatment may consist of a soluble chemical liquid fertilizer, insecticide, or fungicide. However, I wish it to be understood that the invention is not limited to the handling of a secondary liquid of this particular class.

The general object of my present invention is to provide a highly eflicient jet pump that is of simple construction; that is inexpensive to manufacture, and that may be conveniently cleaned, the same being composed of relatively few parts that are capable of being assembled and disassembled easily and quickly, and that are desirably made of non-corrosive materials so as to be unaffected by various chemicals, including mercuric and mercurous chlorides.

Jet pumps are characterized by a main pressure passage and a branch suction passage, and in adapting such devices to my purpose it is found advantageous to include a check valve for preventing reverse flow through the suction passage in the event excessive back pressure builds up within the main passage. Otherwise, under such circumstances, the concentrated solution would become diluted and the container holding the same would be caused to overflow. Therefore, it is another object of my invention to provide, in a jet pump, an extremely simple and inexpensive check valve that is thoroughly reliable; that is durable in service, and that is readily accessible for inspection, cleaning and replacement.

The foregoing objects are attained in the embodiment of the invention illustrated in the accompanying drawing wherein Fig. 1 is a view showing my improved jet pump attached to a faucet, which provides the water supply, and in communication with a container that holds a quantity of the liquid treatment, a section of hose being connected to the pump and through which the mixture of water and treatment is distributed;

Fig. 2 is a side elevational view of the pump;

Fig. 3 is a central longitudinal section through the same, substantially on the line 3-3 of each of Figs. 4 and 5, and

Figs. 4 and 5 are sections on the line X-X of Fig. 3 looking, respectively, in the direction of the arrows 4 and 5.

Describing the invention by the use of reference characters, 1 designates, generally, the body member of the 2,741,997 Patented Apr. 17, 1956 pump. This member is desirably made, as by molding, of a non-corrosive material, such as a plastic that will not be affected by strong chemicals. The body member terminates at one end in an internally threaded cylindrical flange 2 for connection with the threaded end of a faucet, or to the threaded part of a hose coupling in instances where a hose provides the water supply. The flange 2 istsho-wn as having ribs 3 on its exterior for the obvious purpose of affording a better grip when applying the pump to a faucet or hose connection; The body member terminates at its opposite end in an externally threaded boss 4 for the reception of a conventional hose connection.

At the base of the threaded flange 2, on the interior thereof, the body member is provided with an annular shoulder 5 that surrounds a shallow circular depression, the peripheral wall of which is shown as flared in the direction of the flange 2. Fitting within this shallow flared depression is a plate or disc 6, also desirably of plastic. The disc 6 is provided with a central aperture 7 that opens through the side of the disc toward the flange 2, While the opposite side of the disc is formed with a shallow recess 8 that is somewhat greater in diameter than, and is concentric with, the aperture 7.

10 denotes a main pressure passage that extends axially through the body member 1, and the inlet end of said passage is of substantially the same diameter as the recess 8 wherewith it registers, so that said recess constitutes an extension of the main passage. This passage, adjacent its inlet end, is shown as cylindrical for a distance from the disc 6, and therebeyond as flaring toward its outlet end. An annular chamber 14 of substantial depth opens through the circular wall of the beforementioned depression, in concentric relation to the inlet end of the passage 10. Communication between the main pressure passage 10 and the chamber 14 is provided by a channel 15 in the disc 6 that extends radially from the recess 8, as shown in Figs. 3 and 5. An. extension or hose connection 16 projects laterally from the body member 1, and through it extends a branch suction passage 17 that opens at-its inner end through the peripheral Wall of the annular chamber 14. A check valve 18 prevents reverse or back flow through the branch passage 17 and, in its present preferred form, it consists of a short length of standard tubing of natural or synthetic rubber that floats, so to speak, within the chamber 14, and upon initial reverse flow of liquid through said chamber, the valve 18 snaps against and yields to the contour of the peripheral Wall of the chamber about the inner end of the branch passage 17 and is held against said wall as long as back pressure prevails within the chamber.

In order to reduce the weight of the body member and effect some saving in material, a relatively deep annular channel 20 is formed in the body member and opens through the end thereof about the outlet end of the main passage 10.

It is evident from the foregoing construction that the valve 18 is confined within the chamber 14 by the disc 6; and that said disc, in turn, is held in place by a washer 21 that fits tightly within the threaded flange 2, adjacent the base thereof, and overlies the marginal portion of the disc. Thus the parts of the structure are held in assembled relation by said washer, and upon removal of the washer, the disc 6 and valve 18 may be readily withdrawn for inspection and cleaning.

Also, since the plastic parts are preferably molded, accuracy and economy of production are assured, and these ends are further advanced by the use of a standard hose washer for the part designated 21, and a piece of conventional tubing of natural or synthetic rubber for the valve 18. i

In preparing to use the invention in a hookup like that illustrated in Fig. l, the flanged end of the jet pump is screwed onto the faucet 23, and a section of garden hose 24 is attached, by the conventional connection 2.5, to the boss 4 of the pump. A relatively small tube or hose 25 has one of its ends frictionally engaged over the extension or hose connection in of the pump and its opposite end, to which a strainer 27 of stainless steel or other noncorrosive material is attached, dropped into a container 39 that holds a quantity of concentrated solution that forms the trea ment that is to be applied, with the water, to a lawn or other planted area by means of the hose 24. The container 30 may consist of an ordinary pail, and since the jet pump is interposed between the faucet and the inlet end of the hose 2d and has communicative connection with the container 36) through the relatively short hose 26, the container may be left in one position while shifting the outlet end of the hose 24 about in the sprinkling of an entire area that is capable of being reached by the hose. In practice, the length of the hose 24 should not exceed approximately fifty feet.

Thus, my invention is distinguished from those types of aspirators that are attached to the outlet end of the hose, and which makes it necessary for the user to carry the container for the treatment about with him as the sprinkling progresses. With my invention, the treatment is administered in the customary manner of sprinkling, and the water, with the treatment therein, is applied at about the usual rate as to speed and quantity. A further advantage of having the pump interposed between the water supply and hose is that the treatment is thoroughly mixed with the water before it reaches the outlet end of the hose.

Having thus described my invention, what 1 claim is:

1. In a jet pump, a body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward its outlet end, the body member having a chamber that opens through a surface of said member adjacent the inlet end of said main passage, a plate positioned upon said surface, said plate having an orifice in register with the inlet end of the main passage, restricted areas of said surface and said plate being spaced apart to provide a passageway through which said chamber communicates with the main passage, the aforesaid branch passage opening at its inner end into said chamber, and a flap valve confined in said chamber by said plate for engagernnct over the inner end of the branch passage.

2. in a jet pump, a body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward its outlet end, the body member having a chamber that opens through a surface of said member adjacent the inlet end of said rain passage, a plate positioned upon said surface, said plate having an orifice in register with the inlet end of said main passage, restricted areas of said surface and said plate being spaced apart to provide a passageway through which said chamber communicates with the main passage, the aforesaid branch passage opening at its inner end into said chamber, a valve confined in said chamber by said plate for engagement over the inlet end of the branch passage, an internally threaded flange defining one end of the body member and surrounding the aforesaid surface, and a Washer of pliable material holdingly engaged within said flange and serving to retain said plate adjacent said surface.

3. In a jet pump, a body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward its outlet end, the body member having an annular chamber that opens through a surface of said member surrounding the inlet end of said main passage, a plate positioned upon said end surface, said plate having an orifice in register with 4 the inlet end of the main passage, the plate being provided with a radial channel through which the main passage communicates with said annular chamber, the aforesaid branch passage opening at its inner end into said chamber through the peripheral Wall of the latter, and a flap valve afloat in said chamber.

4. In a jet pump, the combination and arrangement of parts defined claim 3, wherein the body member includes an internally threaded flange that surrounds said surface, and a washer of pliable material confined within said flange and overlying the edge portion of said plate and serving to hold the plate upon said surface.

5. In a jet pump, a body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward its outlet end, the body member having an annular chamber that opens through a surface of said member surrounding the inlet end of said main passage, a plate positioned upon said surface, said plate having an orifice in register with, and of smaller cross sectional area than, the inlet end of the main passage, the plate having a recess in the side thereof adjacent said main passage that constitutes an extension thereof of slight depth, the plate being further provided with a radial channel through which the extension of the main passage communicates with said annular chamber, the aforesaid branch passage opening at its inner end into said chamber through the peripheral wall of the latter, and a flap valve consisting of a tube of pliable material afloat in said chamber.

6. In a jet pump, the combination and arrangement of parts defined by claim 5, wherein the body member includes an internally threaded flange that surrounds said surface, and a washer of pliable material confined within said flange and overlying the edge portion of said plate and serving to hold the plate upon said surface, the end of the body remote from said flange incorporating hose attaching means.

7. In a jet pump, a body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward its outlet end, the body member having an annular chamber that opens through a surface of the body member surrounding the inlet end of said main passage, the body member having a shallow depression throughout the central region of said surface and extending radially outwardly beyond the annular chamber, a disc occupying said depression and having an orifice registering with the inlet end of the main passage, the peripheral Wall of the depression flaring outwardly and the edge portion of the disc being shaped complementary thereto, the disc being provided with a radial channel through which said main passage communicates with the annular chamber, the aforesaid branch passage opening at its inner end through the peripheral wall of the annular chamber, a flap valve in said annular chamber for engagement overthe inner end of the branch passage, the body member having a lateral extension through which the branch passage opens exteriorly of said chamber and that is shaped to provide a connection for a hose, the body including an internally threaded flange that surrounds the aforesaid surface, and a washer of pliable material confined by said flange adjacent said end surface and overlying the edge portion of the disc.

8. in a jet pump, body member characterized by a main pressure passage and a branch suction passage, the main passage extending through the body member and enlarging in cross sectional area toward. its outlet end, the body member having an annular chamber that opens througl'i a surface of the body member surrounding the inlet end of said main passage, the body member having a shallow depression throughout the central region of said surface and extending radially outwardly beyond the annular recess, disc occupying said depression and having an orifice in substantially concentric relation to,

and of smaller cross sectional area than, the inlet end of the main passage, the disc being provided with a shal' low recess in axial alignment with said orifice that registers with and constitutes an extension of the main passage, the disc being further provided with a radial channel through which said recess communicates with the annular chamber, a flap valve consisting of a tube of pliable material afloat in said annular chamber, the aforesaid branch passage opening at its inner end into said annular chamber through the peripheral wall thereof, the body member having a lateral extension through which the branch passage opens exteriorly of said chamber and that is shaped to provide a connection for a hose, the body including an internally threaded flange that surrounds the aforesaid surface, and a washer of pliable material confined by said flange adjacent said surface and overlying the edge portion of the disc.

9. A jet pump comprising a body member that terminates at one end in an internally threaded flange and at its opposite end in an externally threaded boss, said flange surrounding a surface of the body member characterized by a shallow circular depression, the body member having an axial main pressure passage that opens at its inlet end into said depression and that enlarges toward its outlet end where it opens through the end of the body constituted of the aforesaid externally threaded boss, the body member having an annular chamber that surrounds the inlet end of the main passage and that opens into the aforesaid depression, the body member being provided With a lateral extension, and having a branch suction passage disposed axially of said extension and that opens at its inner end into said annular chamber through the peripheral wall thereof, a disc fitting within the aforesaid depression and having a central aperture in axial alignment with the main passage, the disc being provided with a radial channel through which the main passage communicates with the annular chamber, a sleeve-like flap valve of pliable material o-ccupying the annular chamber for limited movement in all directions therein, and a washer of pliable material confined within the aforesaid flange adjacent said surface and overlying the edge portion of the disc.

10. A jet pump comprising a body member that terminates at one end in an internally threaded flange and at its opposite end in an externally threaded boss, said flange surrounding a surface of the body member characterized by a shallow circular depression defined in part by an edge Wall that flares outwardly in the direction of said flange, the body member having an axial main pressure passage that opens at its inlet end into said depression and that enlarges toward its outlet end where it opens through the end of the body member constituted of the aforesaid externally threaded boss, the body member having an annular chamber surrounding the inlet end of the main passage and that opens into the aforesaid depression, the body member being provided with a lateral extension, and having a branch suction passage disposed axially of said extension and that opens at its inner end into said annular chamber through the peripheral wall thereof, a disc complementary to and occupying the aforesaid depression and having a central aperture in axial alignment with the main passage, the side of the disc adjacent said passage having a recess substantially concentric with the aperture and that con stitutes an extension of the main passage, the disc being provided, also, with a radial channel through which said recess communicates with the annular chamber, a sleevelike flap valve of pliable material occupying the annular chamber for limited movement in all directions therein, and a washer of pliable material confined within the aforesaid flange adjacent said surface and overlying the edge portion of the disc.

No references cited.

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