US1809419A - Valve - Google Patents

Description

Jne 9,v 1931. E. MULLER 1,809,419

VALVE Filed Jan.I 4, 1927 Z INVENTOR MMV, A

BY v

l ATTORNEY Patented June 9, 1931 STATS VALVE Application led January 4,V 1927. Serial No. 158,924.

`One object of the invention is to provide a water supply controlling valve which embodies novel and improved features of construction whereby hammering or pounding of the valve head into closed position as commonly takes place yin spring closed valves under large water pressures, is prevented, so that both the noise and vibration incident to such hammering or snap closing of the valve as well as the wear and tear upon the valveincident to hammering and pounding is obviated.

Other objects of the invention are to provide a water supply controlling valve so constructed that the valvehead is prevented from being forced againstits seat with a snap action and under the full pressure of the water in thedirection of closing, so that the valve closes substantially noiselessly and with slight impact upon the seat thereof; to provide novel and improved means for retarding the closing movement of the valve head of a sliding stem valve; 'to accomplish this result by means whereby the valve head operates in an inverted cup arranged to surroundthe valve seat and having restricted ports therein communicating with the water supply; to provide a novel and improved dash-pot construction for a sliding stem liquid supply valve for preventing snap closing and hammering of the valve head rupon its seat, and to obtain other results and advantages as may be brought out by the following description.

Referring to the accompanying drawings, in which corresponding and like. parts are designated throughout the several views by the same reference characters,

Figure l is an enlarged vertical sectional Vview of the water supply controlling valve,

showing the valve in closed position;

Figure 2 is a horizontal sectional view, taken on the line 2- 42 of Figure l;

Figure 3 is a fragmentary view similar to Figure 1, showing the valve at the beginning of the closing operation, and

`Figure 4 is a similar View showing a modified form of the valve.

Specifically describing the embodiment of my invention illustrated in Figures 1-3, in-

clusive, the valve 7 comprises a casing having inlet and outlet passages 50 and 51 respectively, separated by a diaphragm or partition 52 through which is a valve opening 53 disposed at substantially right angles to the inletvand outlet passages 50 and 5l, and having at the inlet side thereof a valve seat 54 with which cooperates a valve head 55 carried by a stem 56 which is slidably mounted at. one end in the valve neck57 at one side of the seat 54, and at its other end in a cap 58 which closes the valve casing at the other side ofthe seat 54. The stem 56 is normally influenced by a compression spring 59 to move the valve head 55 against its seat 54 to close the valve opening 53, said spring being interposed between the cap 58 and a` piston disk 60 fast on the valve stem and having a loosely slidable relation to the valve casing. The valve may be opened by any suitable means such as the lever 34.

To retard the movement of the valve head 55 to its seat 54 and thereby prevent snap or hammer action of the valve head upon the seat, I provide an inverted cup 6l which is co-axially arranged for loose sliding movement upon the valve stem 50 and over` the valve head 55 so that the valve head serves as a piston, the open endof said cup being arranged to abut against the partition 52 and surround the valve seat 54 and being normally iniiuenced toward said partition by a light compression spring 63 interposed between the cup and disk 60. rlhe cup is longer than the valve head 55, and adjacent the outer edge thereof isformed with a plurality of small transverse openings 64 which permit water to iiow into the cup when the same is seated up the partition 52.

When the valve is in normal closed position, the parts are located as shown in Figure l, the valve head 55 being seated, upon the seat 54 and the edge of the cup 61 abutting against the partition 52, the openings 64 in the cup being closed by the valve head 55. Obviously, the space in the cup 6l behind the valve head 55 will be lled with water, and as thev valve stem 56 is moved by the lever 34C inwardly of the casing, the valve head 55 is moved from its seat 54 and simultaneously the cup 61 is moved away from the partition 52. Free iiow of water is thus permitted from the inlet passage 50 through the valve opening 53 to the outlet passage 51. lVhile the valve remains in open position the spring 63 gradually forces the cup 61 toward the partition 52, so that the closed end of the cup rests upon the valve head 55. The proportion of the parts, however, is such that the valve head holds the cup off the partition 52 to permit free flow of the water through the valve opening 53. When the valve stem is released by the lever 34 the spring 59 moves the valve head toward its seat, but the edge of the cup 61 strikes the partition before the valve head reaches the seat, as shown in Figure 3 of the drawings. rlhe movement of the valve head toward the seat is then retarded due to the fact that it must move relatively to the cup 61, and in so moving in the cup 61 creates a suction between itself and the closed end of the cup. The water flows into the cup through the openings 64, and some of it passes between the valve head and the walls of the cup into the space between the closed end of the cup and the valve head. The passages thus provided, however, are so small thatv the movement of the valve head is necessarily slow; and accordingly the valve head approaches the seat 54: slowly and easily and without any material impact or hammering action. Snap action of the valve is also reduced by the disk 60 through a similar action.

Hammering or snap action of the valve may be further reduced by a construction such as shown in Figure 4, where the cup 6l has arranged on the top thereof a cup 66 within which is loosely reciprocable a piston disk 67 fast to the valve stem 56. rihis piston disk 67 corresponds to the disk 6() shown in Figures 1 and 3, but is of considerably less diameter and cooperates with the cup or cylinder 66 instead of with the valve casing. lVhen the valve is closed the piston 67 is arranged within the cylinder 66, and of course the cylinder is filled with water. Upon movement of the valve stem 56 to open the valve, the cylinder 66 moves with the piston 67 and the Vvalve stem, as does also the cup 61, but after the valve has remained open a short time the cylinder 66 is moved away from the piston 67 as is also the cup 61.v As the valve starts to close, the cup 61 engages the partition 52 and thereafter the valve stem and piston 67 move relatively to the cylinder 66 which is fixed with respect to the partition, and as the piston 67 must partially displace the water in the cylinder 66 and the How of water from the piston is restricted by the close lit of the piston therein, the movement of the valve stem under the influence of the spring 59 is thus retarded.

Preferably, the seat of the valve is removable and may be in the form of an exteriorly screw threaded bushing or tube 68 fitted in a screw threaded opening 69 in the partition 52.

0f course, while l have shown the cup 61 cooperating with the valve head, and the cylinder 66 with the piston 67 used together in one valve, these two retarding means might be used separately and independently in different valves. Furthermore, it will be obvious that the invention is susceptible of use in pump valves and many other different types of valves than that illustrated and described, and that the details of construction of the valve may be modified and changed by those skilled in the art without departing from the spirit or scope of the invention. Therefore, I do not desire to be understood as limiting myself except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what I claim is:

1. A valve comprising a body having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat, a valve stem slidably supported in said body at opposite sides of said valve opening, a valve head fixed on said stem to cooperate with said valve seat, a cup slidable upon said valve stem providing a cylinder for the valve head with its open end arranged to abut said partion around said valve seat and having lateral openings near said open end, a stop on said valve stem at the opposite side of the cup from the valve head, and a spring on said valve stem between said stop and the cup normally iniiuencing said cup toward the valve head, whereby all said parts upon the valve stem can be inserted into a valve body as a unit and positioned with respect to one another by said valve stem.

2. A valve comprising a body having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat, a valvestem slidably supported in said body at opposite sides of said valve opening, a valve head fixed on said stem to cooperate with said valve seat, a cup slidable upon said valve stem providing a cylinder for the valve head with its open end arranged to abut said partition around said valve seat and having lateral openings near said open end, a piston disk on said valve stem at the opposite side of the cup 'from the valve head for retarding movement of said valve headtoward its seat, a cylinder for said piston disk which cylinder when said cup abuts the partition is fixed with respect to said partition, and a spring on said valve stem between said piston disk and the cup normally influencing said cup toward the valve head, whereby all said parts upon the valve stem can be inserted into a valve body as a unit and positioned with respect to one another by said valve stem.

3. A valve comprising a casing having an inlet passage and an outlet passage separated by a partition formed with a valve opening surrounded by a valve seat, a valve stem slidably mounted in said casing, a valve head mounted on said stem to cooperate with said valve seat to close and open said valvev opening upon movement of said stem in the direction of flow of liquid through the valve and in the opposite direction respectively, a piston on the valve stem for retarding movement of said valve head toward its seat, a spring interposed between said piston and said casing for influencing said valve head to its seat, a cup loosely slidable upon said valve stem and over said valve head with its open end arranged to abut said partition around said valve seat, a cylinder for said piston which cylinder when said cup abuts the partition is fixed with respect to said partition, and a spring in enga ement with said piston for normally in uencing said cup in the direction of closing movement of said valve head, so that said cup is moved and held from said partition by said valve head on the opening movement of the latter and abuts said partition in advance of said valve head upon closing movement of the latter, whereby closing movement of said valve head is restrained.

4. A valve comprising a casing having an inlet passage and an outlet passage separated by a partition formed with a valve opening surrounded by a valve seat, a valve stem slidably mounted in said casing, a valve head mounted on said stem to cooperate with said valve seat to close and open said valve opening upon movement of said stem in the direction of flow of liquid through the valve and in the opposite direction respectively, a cup loosely slidably upon said valve stem and over said valve head with its open end arranged to abut said partition around said valve seat, a spring for normally influencing said cup in the direction of closing movement of said valve head, so that said cup is moved and held from said partition by said valve head lon the opening movement of the latter and abuts said partition in advance of said valve head upon closing movement of the latter, a second cup co-aXial and movable with and facing oppositely from said cup, and a piston on said valve stem to have a loosely reciprocable movement relative to said second cup whereby closing movement of said valve head is retarded.

5. A valve comprising a casing having an inlet passage and an outlet passage separated by a partition formed with a valve opening surrounded by a valve seat, a valve stem slidably mounted in said casing, a valve head mounted on said stem to cooperate with said valve seat to close and open said valve opening upon movement of said stem in the direction of flow of liquid through the valve and in the opposite direction respectively, a piston disk fast on said valve stem, a pair of oppositely facing cups slidable on said valve stem between said piston disk and valve head and forming cylinders to loosely receive said parts, both said cups being movable with said piston disk and valve head upon opening movement of the latter, and means for limiting movement of said cups with respect to said piston disk and valve head upon closing movement of the latter, whereby closing of the said valve head is retarded.

EDWARD MULLER.

Images