US2477127A

US2477127A - Valve

Info

Publication number: US2477127A
Application number: US594705A
Authority: US
Inventors: Holtz Gustav
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-05-19
Filing date: 1945-05-19
Publication date: 1949-07-26
Anticipated expiration: 1966-07-26

Description

July 26, 1949.

HOLTZ 2,477,127

VALVE Filed May 19, 1945 figa.

INVENTOR, G05 7741 HOL TZ.

AGENT.

Patented July 26, 1949 UNITED'STATES' PATENT OFFICE Gustav Holtz, San Francisco, Calif.

Application May 19, 1945, Serial No. 594,705

The present invention relates to valves suitable for controlling the flow of fluids, and more particularly to improvements in the construction of valves of the manually opened, self-closing type. In certain applications wherein valves are employed, it is often desirable to provide a valve which may be quickly opened by hand and which will automatically return to closed position when the operating handle is released.- Such valves, for example, are commonly used upon ships and other places for flushing water closets. Valves of this type are generally opened manually against the action of a spring and returned to closed position again through the action of the sprin or springs. It has been proposed in the past to mount the valves slidably in a housing which is provided with openings so that the water flowing through the valve casing will also enter above the valve proper and assist the spring or springs in returning the valve to its seat. When this arrangement is not employed, it is necessary to provide a sprin having sufficient force not only to return the valve to closed position but also to overcome the pressure of the water below the valve body and between the valve and the valve seat.

In my prior United States Patent No. 1,589,696, issued June 22, 1926, there is shown a manually opening, self-closing valve wherein the advantage is taken of the water pressure to assist in closing the valve. The present invention relates primarily to certain improvements in the'structure and operation of the valve disclosed in the patent referred to above.

In my previously mentioned patent the valve housing is provided with openings which serve the purpose of permitting the water or other fluid to enter above the valve proper, tl'iese openings also serving as guides for the movement of the valve. Accordingly the openings are arranged in the form of angularly disposed slots, into which an element carried by the valve stem enters, the valve stem proper extending upward from the valve through the tubular housing and carrying a handle, whereby it may be turned, and at the same time will be lifted in a direction to open the valve, owing to the engagement of the projections on the lower end of valve stern with the anew larly disposed slots. A compression spring mounted above the valve and surrounding the valve stem serves to return the valve stem and valve to closed position when the handle re.- leased, the pressure of the water entering the housing also assisting in bringing about the clo sure of the valve. The projections carried by Claims. (Cl. 251-132) the valve stem which engage the angularly disposed slots are in the form of a pin passing through the valve stem and provided with antifric-tion rollers at the opposite ends thereof which travel in the aforementioned slots.

A primary object of the present invention is to provide improved construction in the pin carried by the valve stem which engages the angularly disposed slots. A further object is to provide a pin of the type described above which provides greater bearing surface and accordingly facilitates operation of the valve. Another object is to provide a pin of the class described which is simple in construction, foolproof in operation and readily replaced when worn or damaged. A still further object of the invention is to provide an improved valve stem packing arrangement for valves of the present type.

Additional objects, together with some of the advantages to be derived in utilizing the present invention, will become apparent from the following detailed description thereof taken together with the accompanying drawings forming part of the specification and wherein:

Fig. 1 is a vertical elevation, partly in section, illustrating the construction and assembly of a manually opening, self-closing valve according tothe invention. I

Fig. 2 is a vertical elevation of the valve parts shown removed from the valve casing.

Fig. 3 is a fragmentary elevation, partly in section, taken through 3-3'oi Fig. 2.

'Fig. .is an elevation, partly in section, of the improved guide pin utilized in the invention.

Referring particularly to Figs. 1, 2 and 3, the valve shown in the-accompanying drawings comprises a valve casing I, having threaded intake and

discharge openings

2 and 3, between which openings is provided a web 4 having a removable valve seat 5 threadedly engaged thereto. The valve unit 6 extends into the casing l and is removably positioned in place by a flanged, internally threaded collar 8 which screws onto a nipple a carried. by easing l. Collar 8 engages an annular flange ill on the especially constructed cylindrical housing ll of valve unit It, also engaging the outer end of nipple 9. In this manner valve I2 is disposed in proper'relation to its seat so that it may be seated and unseated on valve seat 5 while. remaining in the lower end of housing ll.

Valve I 2. is detachably mounted in cap l3 in the lower end of valve stem M by a suitable fastening, such as the threaded bolt-and-nut arrangement shownat 5, although it will be appreciated that any desirable detachable fastening may be employed for this purpose. Valve stem l4 extends upwardly through the opening in the upper end of housing II and on its upper end is provided with an operating handle or lever I! detachably mounted thereon. Valve stem 14 is also provided with a rigidly secured collar it which may be formed as a part of the valve stem, if desired, pin 20 passing through collar [8 and valve stem I 4 in slidable and rotatable relationship therewith. A compression spring' 23 is mounted on valve stem l4 and engages at its upper end a packing element supporting collar 24 slidably mounted on valve stem M, the lower end of compression spring 23 abutting against collar l8.

Pin 20 is sufficiently long to extend beyond the diameter of collar I8 and engages angularly disposed

slots

22 and 22 provided in the sides of valve housing H. The portion of valve housing ll containing the

slots

22 and 22* therein is spaced from the wall of valve casing I and water accordingly enters the housing through intake opening 2 and

slots

22 and 22. Thus the pressure of the water is directly applied to the upper side of cap l3, in which valve I2 is mounted, and tends to force valve [2 and valve stem H in a direction to seat valve l2 on valve seat 5. The bore of the housing which receives the valve l2 and cap l3 as they are raised is enlarged, as indicated at 25, and the lower end of the valve is of less area accordingly than the upper end, as a result of which a greater pressure is exerted on the intake side of the valve than on the discharge side thereof; this pressure diiferential serving to assist the spring 23 in bringing about automatic closin of the valve.

Referring particularly to Figs. 3 and 4, the guide pin comprises a first roller 3! provided with a stem portion 32 which is, in turn, provided with a groove 33 towards the end thereof. A second roller 34 is drilled to receive the stem portion 32 of roller 3|. When the two rollers have been assembled, as shown in the drawing, roller 34 is swaged, as indicated at 35, thereby indenting the interior surface of roller 34 into the groove 33 of stem portion 32. The swaging operation is carried out in such manner that when completed the two rollers can not be separated from each other but are freely rotatable with respect to each other.

It will be seen that the guide pin illustrated serves as an anti-friction roller, although constructed of but two parts, and that substantially the entire length of the stem 32 serves as a, hearing surface for rotation of roller 34 with respect to the roller 3|. The facile rotation of these rollers, with respect to each other, is necessitated by the fact that they must rotate in opposite directions while engaging

slots

22 and 22 in valve housing H as the valve is opened and closed by manipulation of handle I1,

The valve stem packing arrangement, referring to Fig. 1, comprises a packing ring 2'! formed of rubber, leather or other suitable packing material which is engaged by collar 24 which is constantly urged upwardly against packing ring 21 by the compression spring 23. Valve housing H-terminates in a threaded nipple 36 having an internal diameter sufliciently larger than valve stem l4 to permit insertion of a second packing ring and packing ring follower 29 which is in the form of a collar slidably mounted on valve stem l4. Cap 28 is rotatably mounted on valve stem l4 and threadedly engages nipple 36. As cap 28 is threaded onto nipple l3 it bears against the top of packing ring follower 29, thereby exerting pressure on packing ring 30 and forming a fluid-tight seal between valve stem l4 and packing ring 30.

In the operation of the valve, when valve handle I! is turned in a counter-clockwise direction, in looking down on the valve, in Fig. 1 it will be seen that collar [8 is rotated with valve stem l4, thereby rotating the pin 20, which, due to its

engagement'with slots

22 and 22, brings about a simultaneous lifting of valve 12 from valve seat 5 as valve stem I4 is turned. Compression spring 23 is, of course, further compressed as collar IB is raised by the action of the guide pin 20. In this manner the flow of water through intake, outlet 2 and discharge outlet 3 is permitted. When handle I l is released pressure of water in the valve casing l I above cap l3 and; valve l2, assists compression spring 23 in returning the valve to closed position, guide pin 20 rotating valve stem 14 and valve l2 as it is closed and thereby further insuring firm seating of valve l 2 in valve seat 5.

I claim:

1. A valve comprising a casing having intake and discharge openings, a valve seat in said casing, a tubular valve housing mounted in said casing, valve means including a valve stem mounted rotatably in said tubular housing, said valve means engaging said valve seat to prevent fluid flow from said intake opening to said discharge opening when said valve means is in closed position, said valve housing being provided with angularly disposed guide slots in the walls thereof, and a guide pin extending through said valve stem in slidable and rotatable relationship therewith and engaging said guide slots, whereby said valve means is raised and lowered with rotation of said valve stem, said guide pin comprising a first roller provided with a cylindrical stem and a second roller rotatably mounted on said cylindrical stem, each of said rollers engaging said valve stem and oppositely rotatable relative to one another.

2. A valve comprising a valve casing having intake and discharge openings, a tubular valve housing mounted in said valve casing, a valve seat mounted in said valve casing, valve means including a valve stem rotatably and slidably mounted in said valve housing, said valve stem extending through the top of said valve housing, packing means engaging said valve stem whereby fluid leakage around said valve stem at the point whereat said valve stem passes through said valve housing is prevented, said valve means engaging said valve seat to prevent fluid flow from said intake opening to said discharge opening when said valve means is in closed position, spring means normally urging said valve to closed position and simultaneously urging said packing means against said valve stem, said valve housing being provided with angularly disposed guide slots in the walls thereof providing flow communication between said intake opening and the interior of said valve housing above said valve means, and a guide pin extending through said valve stem in slidable and rotatable relationship therewith and engaging said guide slots, whereby said valve means is raised and lowered with rotation of said valve stem, said guide pin comprising a first roller provided with a cylindrical stem at one end thereof, said cylindrical stem being provided with an annular roove and a second roller rotatably mounted on said cylindrical stem, said second roller being circumferentially swaged into said annular groove in said cylindrical stem, thereby preventing separation of said rollers, each of said rollers engaging said valve stem and oppositely rotatable relative to one another.

3. In a valve actuating mechanism the combination comprising a valve housing, valve means including a valve stem slidably and rotatably mounted in said valve housing, and a guide pin slidably and rotatably mounted in said valve stem and extending transversely therethrough, said valve housing being provided with angularly disposed guide slots, the ends of said guide pin engaging said guide slots, whereby said valve means is raised and lowered upon rotation of said valve stem in said valve housing, said guide pin comprising a first roller provided with a cylindrical projection on one end thereof and a second roller rotatably mounted on said cylindrical projection, each of said rollers engaging said valve stem and oppositely rotatable relative to one another.

4. In a valve actuating mechanism the combination comprising a valve housing, valve means including a valve stem slidably and rotatably mounted in said valve housing, and a guide pin slidably and rotatably mounted in said valve stem and extending transversely therethrough, said valve housing being provided with angularly disposed guide slots, the ends of said guide pin engaging said guide slots, whereby said valve means is raised and lowered upon rotation of said valve stem in said valve housing, said guide pin comprising a first roller provided with a cylindrical projection coaxially disposed at one end thereof, said cylindrical projection being provided with an annular groove, and a second roller having the same external diameter as said first roller and rotatably mounted on said cylindrical projection, said cylindrical projection being disposed entirely within said second roller and said second roller being circumferentially swaged into said annular groove in said cylindrical projection, thereby preventing separation of said rollers, each of said rollers engaging said valve stem and oppositely rotatable relative to one another.

5. A valve comprising a casing havin an inlet and outlet, a valve housing in said casing, valve means comprising a valve stem rotatably mounted in said housing, said valve housing provided with angularly disposed guide slots in the walls thereof, a transverse bore provided in said valve stem, and a guide pin extending through said bore and engaging said guide slots, whereby said pin is raised and lowered with rotation of said valve stem, said guide pin comprising a pair of rollers rotatable relative to one another, each of said rollers engaging said valve stem, the portions of said guide pin engaging said guide slots being rotatable relative to one another.

GUSTAV HOLTZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,365,694 Jernstedt Jan, 18, 1921 1,589,696 Holtz June 22, 1926 20691 48 Pickup Feb. 9, 1937