US1844532A - Valve structure - Google Patents

Description

Feb. 9, 1932. E. R. WHARTON 1,344,532

VALVE STRUCTURE Filed March 12, 1931 Patented Feb. 9, 1932 UNITED STATES EDWARD R. WEAR-TON, F MEDFORD, MASSACHUSETTS VALVE STRUCTURE Application filed March 12, 1931.

My invention relates to valve structures but more especially to valve structures such as are incor izotsated in the delivery nozzles of grease guns and the like, and it has for its object to improve the construction of valve structures of this class.

It is also an object of this invention to provide an improved valve structure of the type shown and described in my co-pending applix, cation filed January 2, 1931, Serial Number Grease guns and the like have heretofore been provided with a delivery nozzle comprising a tubular body whose outlet end portion was adapted to he slid telescopically on to a nipple forming part of a ported receiving fixture after which the nozzle was partially rotated on the nipple to interlock the two devices so that they would be held 19,; coupled together while operating the gun to deliver grease, oil or the like into the receiving fixture.

It has been common to provide a normally closed valve within the tubular body which a was automatically opened by the nipple when said body was slid endwise on to the same, said valve being normally held closed, and yieldingly urged toward the outlet end of the body, by a coiled spring which was the :ri sole means depended upon for closing said valve while the nozzle was being removed endwise from the nipple at the conclusion of the delivery operation of the gun.

In the application above referred to the "I; valve is positively opened by rotation of the body on the nipple in a direction to lock the same thereto and positively closed by rotation of said body in the opposite direction when uncoupling said body from the nipple.

u) it also a feature of the invention of said Serial No. 522,046.

proved valve structure of the same type as that shown and described in my co-pending application above noted and characterized by the same mode of operation, and this invention resides in the peculiar features of construction and arrangement of parts set forth in the following description, the several features of the invention being particularly pointed out and defined in the claims at the close thereof.

In the accompanying drawings lligure 1 is a central longitudinal sectional view of a delivery nozzle for grease guns and the like, said nozzle being shown coupled to the nipple of a receiving fixture and with the valve mechanism thereof in its open condition.

Figure 2 is a central longitudinal sectional view of the nozzle shown in Figure 1 with the valve mechanism thereof in its closed condition.

Figure 3 is a section on line 3-3 of Fig. 1.

Figure 4 is a section on line 44 of Fig. 1.

Figure 5 is a section on line 55 of Fig. 1.

Figure 6 is a section on line 66 of Fig. 1.

Figure 7 is a side elevation of the valveoperating member hereinafter described.

Figure 8 is an end view of the valve-operat ing member shown in Figure 7.

Herein I have embodied my invention in a nozzle for grease guns and the like comprising a tubular or hollow body 10 that is formed interiorly with a bore or chamber 11 extending from end to end thereof which is, in most part, approximately cylindrical.

One end portion 12 of this chamber is hereinafter referred to as the inlet end portion and the opposite end portion 13 is hereinafter referred to as the outlet end portion.

Within the outlet end portion 13 of chamber 11 the body 10 is formed with a pair of integral segmental lugs 14, one at each side of chamber 11, said lugs having straight, relatively parallel, chord-like inner edges which are spaced apart to provide between them a passageway for the end portion of the nipple a of a ported receiving fixture A of usual construction which is ordinarily permanently attached to a hearing or the like.

The nipple a is formed with a cylindrical neck 6 at the inner end of which is provided an annular shoulder c and at the outer end of which is provided a head including as parts thereof two radial lugs e disposed diametrically opposite each other and of no greater width than the neck I).

The diameter of the neck Z) is slightly less than the passageway between the lugs 1a of body 10 and the distance from endto end of the lugs e, as well as the diameter of the body portion of nipple a, is slightly less than the diameter of the outlet end portion 13 of chamber 11.

Therefore, it is possible to slide the outlet end of body 10 telescopically on to the nipple a with the lugs 6 held in positions to pass between and beyond the lugs 14 after which rotary movement of body 10 on the nipple a to the extent of ninety degrees in a right hand direction places the lugs e behind the lugs 1a thereby interlocking the body and nipple so that they are held or locked coupled together as shown in Figure 1.

The fixture A. is made with a port or conduit 7 whose inlet end is at the center of the head of the nipple and controlled by the usual outwardly closing spring pressed ball check valve 9.

Within the chamber 11, behind the lugs 14, is provided a novel valve mechanism including a rotatable and axially movable valve operating member 15 comprising an approximately cylindrical body 16 slidably fitting the chamber 11. At its inner rear end the body 16' is formedwith a boss 17 having an exteriorly grooved cylindrical base portion, Figure 7, upon which a packing ring 35 of leatheror the like is secured by means of a split ring 36 that is sprung into the groove of said boss.

The inner end portion of the boss 17 is formed upon opposite sides thereof with parallel flat sides 17a to adapt the same to fit loosely between a pair of jaws 18 provided at the outer end of the stem 19 of a disk gate 7 valve 20. At its inner end the boss 17 is made with an axially alined exteriorly cylindrical piston extension or stud 21 snugly butslidably fitted within a cylindrical hole 22 formed through valve 20 and its stem 19 at the middle thereof.

The valve 20 is rotatably mounted within. a cup shaped valve seat member 23 having four ports 24 formed therethrough to cooperate with four ports 25 formed through the valve member 20. The ports 24- and 25 are all positioned the same distance from the axis of valve 20 and the ports of each set are relatively disposed angularly ninety degrees apart around the axis of the valve. It will, therefore, be clear that by rotatively adjusting. the valve its ports 25 be positioned in register with the ports 24 to open the valve mechanism, or they may be positioned between the ports 24' to close the valve mecha- 1 nism.

The cup-like valve seat member 23 is fixed immovably within the inlet end of the body 10 so as to constitute a part or section thereof, by means of a key-pin 26 and threaded sleeve 27.

The valve member 20 is held in position.

36' where it is formed with radial branches 3O communicating with chamber 11 between packing ring and valve seat member 23.

The threaded sleeve 27 is screwed on to the usual exteriorly threaded outlet nipple (not shown) of the cylinder of the grease gun or the like so that when the valve mechanism is in its open condition and the grease gun or the like is operated to discharge material therefrom into the inlet end of the nozzle, said material is forced under pressure through the ports 25 and 24: into that part of chamber 11 which is between valve seat member 23 and packing 35 and thence through branch ports 30 and main port 29 into the port 7 of the receiving fixture A.

Into the outlet end portion of the port 29 is driven a pin or stud 32 whose outer end is projected into the inlet end of port f when the nozzle is slid telescopically on to the nipple of the receiving fixture and thereby operates to open the check valve 9 against the pressure of its spring, and to hold said check valve open during the delivery operation.

The pin or stud 32 is square in cross-section and when driven partly into port 29, four passageways or ports exist around said pin or stud as shown in Figure 8, through which the material is delivered into port 7" as described.

When the body 10 is slid on to the nipple a the lugs e of the latter pass between the lugs 14 on body 10 and the end portion of the nipple surrounding the inlet end of port f is brought into abutting engagement with an annular complementary seat 37 Figure 8, provided upon the outer end of valve-oper ating member 15 around the delivery ends of the four passages or ports alongside of the pin or stud 32. Continued movement of body 10 endwise on to the nipple after the latter is in engagement with the seat 37 shifts the body 10 axially relatively to the nipple a and valve-operating member 15 until the lugs 14; of the body have passed the lugs e of the nipple, whereupon the body 10 is turned ninety degrees in a right hand direction which brings the lugs 14 into position behind the lugs 6 thereby interlocking the nipple and body.

The outer end of the valve operating member 15 is made with two lugs 42 which are diametrically opposite each other and sepa rated, one from the other, a distance slightly greater than the diameter of the neck 7). Therefore, as the body 10 is shoved endwise on to the nipple as described the lugs e of the latter are caused to be positioned between the lugs 42 of the valve-operating member with the result that the nipple holds said member against rotating with the body 10 when the latter is given a quarter turn to position the lugs 14: behind the lugs 6. It will, therefore, be clear that the rotation of valve seat member 23 with the body 10 opens the valve mechanism preparatory to the delivery operation of the gun.

During the delivery operation of the gun the grease or other fluid material is subjected to great pressure and transmits this pressure to the inner end of the piston 21 and also upon the packing ring Consequently, the pressure thus imposed on these parts, together with the re-action of this pressure through the piston and cylinder of the gun upon body 10, serves to cause said body and valve-operating member 15 to hold the latter tightly seated against the end of the nipple during the delivery operation.

As shown in Figure 5 the body 16 of the valve-operating member 15 is formed upon its exterior with an arcuate notch 38 that occupied by a. stop lug 39 provided upon the interior of body 10 which co-operates with shoulders 40 and 41 at opposite ends of said notch. These shoulders are spaced apart an angular distance of ninety degrees plus the thickness of the stop lug 39 and through engagement with the latter serve to limit to ninety degrees the rotary movement of body 10 in either direction relatively to valve-operating member 15.

Thus, when the delivery operation is completed. and body 10 is turned on the nipple a in a left hand direction to uncouple the body and nipple and close valve the extent of the movement of the body in this direction is limited to ninety degrees by the engagement oi lug 39 and shoulder 40. When lug 39 is thus brought against shoulder the lugs 42 of the valve-operating member are in position behind the lugs 14, and the lugs e of the nipple are in register with the passageway between said lugs 14 so that body 10 can be removed endwise from the nipple.

ills the body 10 is removed endwise from the nipple the pressure of the fluid material behind the packing ring 35 and against the inner end of the piston 21 urges the valveoperating member outwardly until. the lugs i2 seat against the lugs 14 of the body where they remain until said body is again applied to the nipple.

What I claim is:

1. In a valve structure for controlling the delivery of a fluid under pressure the combination with a body formed with a chamber extending therethrough having inlet and outlet end portions whereof the latter portion is adapted to he slid on to the nipple of a ported receiving fixture and then rotated to interlock said body and nipple, of a valve mechanism comprising a port-controlling valve member mounted within said chamber so that said body is movable rotatively with relation thereto but not axially; a ported valve-operating member adj ustably connected with said valve member and mounted within said chamher so that said body is movable axially and also rotatively with relation thereto, said valve-operating member having means adj acent its outer end to abut and interlock with said nipple when said body is slid on to thelattor so that when said body is thereafter rotated to interlock it with said nipple, the said valve and valve-operating members are held stationary by said nipple, the connection between said two members permitting the pres sure of the fluid within the inlet end portion of said chamber to urge said valve-operating plember toward the outlet end of said cham- 2. In a valve structure for controlling the delivery of fluid under pressure, the combination with a body formed with a chamber extending therethrough having inlet and outlet end portions whereof the latter porti on is adapted to be slid telescopically on to the nipple of a ported receiving fixture and then rotated to interlock said body and nipple, of a valve mechanism comprising a valve member for controlling the passage of fluid under pressure through said chamber, said member being mounted within said chamber and rotatable relatively to said body but immovable axially with relation thereto, and a ported valve-operating member adjustably connected with said valve member and mounted within said chamber between said valve member and said outlet end portion so that it is movable both axially and rotatively with relation to said body, said valveoperating member having means adjacent its outer end to abut and interlock with the nipple of the receiving fixture when said body is slid on to said nipple thereby to cause said nipple to hold said valve and valve-operating member stationary when said body is rotated to interlock it with said nipple, the connection between said two members permitting of axial movement of said valve-operating member relatively to said valve member so that the pressure of the fluid within the inlet end portion of said chamber urges said valve operating member toward and against the end of the nipple of the receiving fixture during the delivery operation.

3. A valve structure for controlling the delivery of fluid under pressure constructed in accordance with claim 2 and including a packing ring mounted u on the exterior of said valve-operating mem er and slidably engaging the interior of said body thereby to prevent leakage of material through the joint between said valve-operating member and said body.

4. A valve structure for controlling the delivery of fluidunder pressure constructed in accordance with claim 2 and including means provided at the outer end of said valve-operating member to engage and open the valve of a receiving fixture of the character described when said body is slid telescopically into position upon the nipple thereof.

' 5'. A valve structure for controlling the delivery of fluid under pressure constructed in accordance with claim 2 and wherein the outlet end portion of said chamber is constructed with a pair of oppositely disposed lugs to interlock with the nipple of the receiving fixure and which also serve as stops to limit the outward movement of said valveoperating member under the influence of said pressure.

Signed by me at Boston, county of Suffolk, and State of Massachusetts, this 2nd day of March, 1931. 1

' EDWARD R. WHARTON.

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