US3367622A

US3367622A - Throttle valve for spray nozzles

Info

Publication number: US3367622A
Application number: US488360A
Authority: US
Inventors: Robert J Moore
Original assignee: LEIGH PROD Inc
Current assignee: HARROW SECURITIES Inc A CORP OF; Harrow Products LLC
Priority date: 1965-09-20
Filing date: 1965-09-20
Publication date: 1968-02-06
Anticipated expiration: 1985-02-06

Description

Feb.- 6, 1968 R. J. MOORE 3,367,622 THROTTLE VALVE-FOR SPRAY NOZZLES Filed Sept. 20, 1965 3 5/ Q INVENTCSR.

3.; 34 4 47 05m J Moore A T TOKMEY United States Patent 3,367,622 THROTTLE VALVE FOR SPRAY NOZZLES Robert J. Moore, Grand Rapids, Mich, assignor to Leigh Products, lino, Coopersviile, Mich. Filed Sept. 20, 1965, Ser. No. 488,360 15 Claims. (Cl. 251114) This invention relates to improvements in a throttle valve for spray nozzles.

The principal objects of this invention are:

First, to provide a hand operated throttle valve for spray nozzle and the like in which the body of the valve is integrally formed with a U-shaped grip of resilient material and is provided with an integral supply tube connection so that the valve is easily held in one hand and the volume of liquid or material being sprayed is easily controlled by squeezing and deflecting the resilient grip portion of the valve.

Second, to provide a throttle valve in which the adjustment of the valve from closed to variably opened position is accomplished by movement of a portion of the nozzle tube through which the liquid is delivered.

Third, to provide a throttle valve which is easily and inexpensively assembled and in which the metallic parts of the spray tube and their support are easily assembled in passages molded into the valve body.

Fourth, to provide a pistol grip valve having the foregoing properties with a hold open member engaged with the body in such a manner as to also retain guide portions of the valve in the body of the valve.

Fifth, to provide a throttle valve which is simple and inexpensive to manufacture and assemble while at the same time being durable and positive in operation.

Other objects and advantages of the invention will be apparent from a consideration of the following description and claims. The drawings, of which there is one sheet, illustrate a highly practical form of the invention.

FIGURE 1 is a fragmentary side elevational view of the throttle valve associated with a delivery tube and spray nozzle and a supply pipe or tube from a source of liquid to be sprayed.

FIGURE 2 is an enlarged fragmentary side elevational view of the body portion of the valve with parts broken away in vertical longitudinal cross section.

FIGURE 3 is a horizontal cross sectional view taken along the plane of line 33 in FIGURE 2.

The valve of the invention is designed primarily for use with pressurized tanks for spraying insecticides but its use is not limited to this purpose and the valve may be used for controlling the delivery of other fluids from other sources. The valve consists of an integral molded member indicated generally at 1 and desirably formed of synthetic moldable plastic or other resilient material. The molded member includes a generally cylindrical but slightly tapered body portion 2 with a tubular connecting nipple 3 projecting downwardly at an angle therefrom. A U- shaped grip has a forward arm 4 extending in integral and downwardly and rearwardly inclined relation from the bottom of the front portion of the body to a cross member 5 and then upwardly in a rear arm 6 which terminates in spaced relationship behind the body portion 2. The body portion 2 has a rearwardly projecting tubular extension 7 of reduced diameter and the rear arm 6 carries an integral forwardly projecting and upwardly opening hook 8 on its front side.

The connecting nipple 3 has an enlarged and shouldered lower end adapted to be forced into a supply tube or hose 10 or resilient material and a common type of hose clamp 11 secures the end of the hose around the nipple 3. The cross member 5 of the handle grip defines a hole or opening 12 through which the end of the hose 10 is extended to the nipple so that the end of the hose is manipulated and directed at the same time as the valve and its body. The sides of the body 2 near the front end thereof have laterally projecting studs or bosses 13 with openings 14 formed therethrough to receive the inturned ends 15 of a generally U-shaped hold open member 16. The hold open member has rearwardly and downwardly projecting side arms 17 connected by a bight or cross portion 18 which is adapted to be swung downwardly into the notch 191 of the hook 8 when the rear arm 6 of the grip and the hook are moved or squeezed forwardly to the dotted line portion shown in 8A.

The head portion 2 of the molded valve is provided with a stepped internal bore having a relatively large front portion 19 terminating in a radially reduced and inwardly projecting shoulder 20. Rearwardly from the shoulder 20 the passage in the head is tapered gradually rearwardly as at 21 to a more sharply converging tapered shoulder 22 which is located rearwardly from the nipple 3 and the passage in the nipple which thus opens into the gradually tapered section 21 of the passage. Rearwardly of the shoulder 22 the body 2. and its rear extension 7 have a passage 31 of a uniform cross section formed therethrough.

Received in the large forward portion 1? of the passage in the body is an annular fitting 32 which may be formed of metal and which has a rearwardly facing external shoulder 33 abutted against the front end of the body 2. An annular groove 34 in the exterior of the fitting 32 receives the inwardly projecting ends of the wire hold open member to retain the fitting within the head of the valve. The fitting 32 defines a central bore or hole 35 of uniform diameter which slidably receives the midsection of a nozzle or spray tube 36. An O-ring seal 37 is positioned in the enlarged recess 19 seals between the shoulder 20, the surface of the delivery tube and the inner end of the fitting 32. The tube extends rearwardly through the tapered portion 21 of the body recess and has an inwardly oifset annular groove 38 formed therein With a second O-ring seal 39 received in the groove and coacting with the surface of the recess in the valve body as will be described. Located rearwardly from the groove 38 and seal 39 is a hole 40 formed in the side of the delivery tube and positioned in the narrowest rear portion 31 of the valve body recess when the valve is closed as shown in the full line position of the tube in FIGURES 2 and 3.

The rear end of the spray or delivery tube 36 is closed by a solid cylindrical extension 41 having a forward tip 42 pressed into the tube and an annular groove 43 into which the rear portion of the tube is knurled or offset as at 44 to form a permanent connection between the tube and the extension. Rearwardly of the tube 36 the extension has a second annular groove 45 formed therein which receives a third O-ring seal 46 in sealing engagement with the small rear portion 31 of the passage through the valve body. The extension 41 projects from the valve body to a threaded stud 47 of reduced diameter. Positioned around the extension 41 and slidable forwardly over the rear extension 7 of the body is a cup like adjustable backing member 48 having a knurled surface 49 and a reduced rearwardly projecting neck 50 that is internally threaded to be adjustably received on the threaded stud 47 of the tube extension. The neck 50 projects through a hole 51 in the upper end of the rear arm 6 of the grip so that the arm abuts against the rear end of the backing member 48. A cap nut 52 clamps the backing member in adjustment position on the stud 47 and a return spring 53 positioned within the backing member and compressed between the rear extension 7 of the body and the bottom of the backing member assists the flexibility of the grip arms in returning the valve to closed position.

In the normally closed position of the valve as illustrated the spring 53 and the resiliency of the

arms

4 and 6 forces the extension 41 and the delivery or spray tube 36 rearwardly into the body of the valve until the seal 39 closes against the sharply tapered portion 22. of the passage in the valve body. Squeezing the

grip arms

4 and 6 forces the tube 36 and seal 39 forwardly along the enlarged tapered section 21 of the valve body passage so that liquid under pressure from the inlet passage 30 is metered past the seal 39 in increasing quantity to the hole 40 in the tube from where it fiows outwardly through the tube to the nozzle 54 or other outlet device on the end of the tube. As the delivery tube and seal 39 are moved forwardly past the inlet passage 30 the valve is in full opened position in which full flow through the valve is provided. In the full opened position the notch 191 of the hook 8 is in the forward dotted position 8-A so that the hold open wire bail 18 can be swung downwardly into the notch to hold the valve open without pressure on the arms of the grip handle.

What is claimed as new is:

1. A manually operable throttle valve having a delivery tube comprising,

an integrally molded valve body having a depending supply nipple and a depending grip with a forward arm connected to the body ahead of the nipple and lower crosspiece below the nipple connected to an upwardly extending arm spaced from the rear of the body,

a passage formed through said body with a relatively large forward portion terminating in a radially re duced internal shoulder merging with a rearwardly converging tapered portion and a second radially reduced tapered shoulder at the rear of said tapered portion joined with the forward end of a rear cylindrical portion, said tube being positioned within said passage in said body, said nipple defining a supply passage opening to said tapered portion,

an annular guide fixture positioned within the enlarged front portion of said passage and around said tube,

a first deformable seal positioned around said tube and between said fixture and said first shouder,

an annular groove formed in said tube and having a second seal positioned therearound and engageable with said second shoulder,

an opening formed through said tube rearwardly of said second seal,

a closure member retained in the rear end of said tube by means of an annular rim rolled from the tube into a receiving groove in the forward end of the closure member,

a third annular seal carried by said closure and sealingly engaged within the rear end of said body,

said tube closure member having a threaded stud on its rear end projecting from the rear of said body,

a forwardly opening cup-shaped adjusting member embracing the rear end of said closure member and movable forwardly over the rear end of said body,

a neck of reduced diameter on the rear of said adjusting member threadedly engaged with said stud and and projecting through the rear arm of said handle a cap nut engaged with said stud and in locking engagement with said adjusting member,

a valve closing spring within said adjusting member and between the rear of said body and the bottom of said adjusting member,

an upwardly opening hook on the forward side of the rear arm of said handle grip,

and a U-shaped hold open bail having inwardly turned ends engaged through openings in the side of said body and retaining said guide fixture in said body,

the bight of said bail being engageable in said hook to hold said valve open.

2. A manually operable throttle valve having a delivery tube comprising,

said lower crosspiece having a hole therein adapted to pass a supply tube to said nipple,

a passage formed through said body with a relatively large forward portion terminating in a radially reduced internal shoulder merging with a rearwardly converging tapered portion and a second radially reduced tapered shoulder at the rear of said tapered portion joined with the forward end of a rear cylindrical portion, said tube being positioned within said passage in said body, said nipple defining a supply passage opening to said tapered portion,

a first deformable seal positioned around said tube and between said fixture and said first shoulder,

an opening formed through said tube rearwardly of said second seal,

a third annular seal carried by said closure and sealingly engaged within the rear end of said body, said tube closure member having a threaded stud on its rear end,

a neck of reduced diameter on the rear of said adjusting member threadedly engaged with said stud and projecting through the rear arm of said handle grip,

a cap nut engaged with said stud and in locking engagement with said adjusting member,

the bight of said bail being engageable in said hook to hold said valve open.

3. A manually operable throttle valve having a delivery tube comprising,

an integrally molded valve body having a depending supply nipple and a depending grip with a forward arm connected to the body and lower crosspiece connected to an upwardly extending arm spaced from the rear of the body,

a passage formed through said body with a relatively large forward portion terminating in a radially reduced internal shoulder merging with a rearwardly converging tapered portion and a second radially reduced shoulder at the rear of said tapered portion joined with the forward end of a rear cylindrical portion, said tube being positioned within said passage in said body, said nipple defining a supply passage opening to said tapered portion,

an opening formed through said tube rearwardly of said second seal,

a closure member retained in the rear end of said tube,

a third annular seal carried by said closure and sealingly engaged within the rear end of said body, said tube closing member having a threaded stud on its rear end,

a cap nut engaged with said stud and in locking engage ment with said adjusting member,

and a valve closing spring within said adjusting memand between the rear of said body and the bottom of said adjusting member.

4. A manually operable throttle valve having a delivery tube comprising,

an integrally molded valve body having a supply nipple extending laterally therefrom and a depending grip with a forward arm connected to the body and lower crosspiece connected to an upwardly extending arm spaced from the rear of the body,

an annular guide fixture retained within the enlarged front portion of said passage and around said tube,

an annular groove formed in said tube and having a second seal positioned therearound and engageable with said tapered portion and second shoulder,

an opening formed through said tube rearwardly of said second seal,

a closure member retained in the rear end of said tube,

said tube closure having a threaded stud on its rear end,

and a U-shaped hold open bail having inwardly turned ends engaged in the side of said body,

the bight of said bail being engageable in said hook to hold said valve open.

5. A manually operable throttle valve having a delivery tube comprising,

and an annular groove formed in said tube and having front portion of said passage and around said tube,

and an annular groove formed in said tube and having a second seal positioned therearound and engageable with said tapered portion,

an opening formed through said tube rearwardly of said second seal,

a closure member retained in the rear end of said tube,

a third annular seal sealingly engaged within the rear end of said body with said closure member,

said tube closure having a threaded stud on its rear end,

the bight of said bail being engageable in said hook to hold said valve open.

6. A throttle valve comprising an integral molded body of resilient material having a supply nipple projecting from one side,

a grip handle having a front arm depending integrally from the bottom of said body and connected by a bottom cross-piece to an upwardly extending rear arm,

said body having a passage formed therethrough in the general plane of said grip handle and having a rearwardly converging tapered central portion,

said nipple defining a supply passage opening to said tapered portion,

a delivery tube extending slidably into said passage from the front of said body,

first seal means engaged between said tube and the inside of said passage forwardly of the tapered portion of the passage,

second seal means movable with said tube and engageable between said tube and the smaller rear end of said passage,

said tube defining an opening in its side located rearwardly of said second seal means,

means closing the rear end of said tube,

third seal means positioned in sealing relation between the closed rear end of said tube and the interior of said passage rearwardly of said tapered portion of said passage,

and means arranged in two way thrust transmitting relation between the closed rear end of said tube and the upper end of said rear arm.

7. A throttle valve as defined in claim 6 in which said nipple projects from said body in the same general plane as said grip handle,

and said crosspiece of said handle has a hole formed therein adapted to receive a supply tube extending from said nipple.

8. A throttle valve as defined in claim 6 in which there is a valve closing spring positioned between the rear of said body and the top of said rear arm.

9. A throttle valve as defined in claim 6 in which said rear arm has a hook on its upper end,

and a hold-open member having its forward end pivotally connected to said body and having its rear end swingable into engagement with said hook in the forwardly deflected valve opening position of said rear arm.

10. A throttle valve as defined in claim 9 in which said hold-open member is a bail having lugs on the ends of its arms engaged in holes in the sides of said body and having its bight engageable with said hook.

11. A throttle valve as defined in claim 10 in which said first seal means is retained in said passage by an annular guide member surrounding said tube,

and said lugs on the arms of said bail extend through said body into retaining engagement with said guide member.

12. A throttle valve as defined in claim 6 in which said two-way thrust transmitting means includes a rear extension part on said tube having a threaded portion,

an adjusting member threaded on said threaded portion,

and a closing spring having its ends engaged between the rear of said body and said adjusting member.

13. A throttle valve as defined in claim 12 in which said adjusting member has a cylindrical portion projecting over said spring and the rear of said body.

14. A throttle valve as defined in claim 6 in which said closing means for the rear of said tube consists of a solid plug secured in the end of said pipe and projecting from the rear of said body,

and said means in two way thrust relation consists of a stud of reduced diameter on said plug projecting through an opening in said rear arm with a radially projecting member on the rear of said stud in overlapping relation to the back of said rear arm.

15. A throttle valve as defined in claim 14 in which said third seal is carried by and movable with said plug.

References Cited UNITED STATES PATENTS 613,041 10/1898 Kamerer 25 l-325 2,369,356 2/1945 Koehn 25 l-353 2,380,608 7/1945 Palm 251245 2,419,720 4/1947 Knight 81; a1. 251149.7

M. CARY NELSON, Primary Examiner.

W. CLINE, Assistant Examiner.

Claims

6. A THROTTLE VALVE COMPRISING AN INTEGRAL MOLDED BODY OF RESILIENT MATERIAL HAVING A SUPPLY NIPPLE PROJECTING FROM ONE SIDE, A GRIP HAVING A FRONT ARM DEPENDING INTEGRALLY FROM THE BOTTOM OF SAID BODY AND CONNECTED BY A BOTTOM CROSS-PIECE TO AN UPWARDLY EXTENDING REAR ARM, SAID BODY HAVING A PASSAGE FORMED THERETHROUGH IN THE GENERAL PLANE OF SAID GRIP HANDLE AND HAVING A REARWARDLY CONVERGING TAPERED CENTRAL PORTION, SAID NIPPLE DEFINING A SUPPLY PASSAGE OPENING TO SAID TAPERED PORTION, A DELIVERY TUBE EXTENDING SLIDABLY INTO SAID PASSAGE FROM THE FRONT OF SAID BODY, FIRST SEAL MEANS ENGAGED BETWEEN SAID TUBE AND THE INSIDE OF SAID PASSAGE FORWARDLY OF THE TAPERED PORTION OF THE PASSAGE.