US2450128A

US2450128A - Mixing valve

Info

Publication number: US2450128A
Authority: US
Inventors: Gordon R Gemmell
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-06-07
Filing date: 1946-06-07
Publication date: 1948-09-28
Anticipated expiration: 1965-09-28

Description

Sept. 28, 1948. G. R. GEMMELL 2,450,128

MIXING VALVE Filed June '7, I946 I fA/vE/v'roe azdo/zikm/r'zel 5y Arrow/5y Patented Sept. 28, 1948 UNITED STATES PATENT OFFICE MIXING VALVE Gordon B. Gemmell, Portland, Oreg. Application June 7, 1946, Serial No. 675,066 I 1 Claim.

This invention relates generally to valves for controlling the temperature of liquids and particularly to a mixing valve.

The main object of this invention is to provide an exceedingly simple and efficient form of mixing valve wherein the temperature of water may be held to a pre-determined temperature regardless of fluctuation in the temperature of the hot and cold water delivered thereto.

The second object is to produce a device of the class described which will be free from delicate or expensive parts and not easily rendered inoperative.

I accomplish these and other objects in a manner set forth in the following specification as illustrated in the accompanying drawing, in which:

Figure 1 is a vertical section through the device.

Figure 2 is an elevation taken along the line 2-2 in Figure 1, with the cover plate and control wheel removed.

Figure 3 is a fragmentary horizontal view taken along the line 3-3 in Figure 1.

Figure 4 is an enlarged vertical section taken along the line 44 in Figure 3.

Figure 5 is an end view of the thermostatic element taken along the line 5-5 in Figure 1.

Similar numbers of reference refer to the same or similar parts throughout the several Views.

Referring in detail to the drawing there is shown a water containing compartment H! having the bottom II, the top l2, the back l3 and the sides M. which are all preferably integral in relation to each other. A cover plate I5 forms a closure for the box and is hermetically sealed by means of the gasket I6 and held by the screws l1. Cold water is admitted to the container l through the inlet pipe I8 and hot water is admitted to the container l0 through the inlet pipe [9. The pipes l8 and I9 are provided with

extensions

20 and 2| whose faces 22 are somewhat inclined in relation to the back l3.

Between the pipes i8 and t9 and on the inner side of the back I3 is formed a post 23 from which extends a pivot bolt 24 upon which is mounted the rocker plate 25 having

extensions

26 and 21 formed thereon, said extensions having the inclined faces 28, which are adapted to register with and seal the faces 22 when brought into contact by a rocking movement of the member 25. It will be noted in Figure 2 that when one of the

members

26 or 21 is in front of its prospective member It or l9, then the other member H3 or I9 is uncovered as is shown in Figure 2.

The cover plate I is also provided with a stuff- 2 ing box 29 containing the packing gland 30 through which extends the reduced portion 3| of the shaft 32.

On the shaft 32 is mounted a spiral thermostatic element 33, whose end 34 is secured to the shaft 32 and whose end 35 is securedto the end member 26, by means of a rivet 36.

The portion 3| of the shaft 32 has a further reduced area 31 upon which is mounted the hub 38 of the hand wheel 39 which is indexed to one of several positions by means of the ball detent 40 contained within the casing 4|,

An outlet opening 42 is formed in the top of the container H] for drawing the water at the desired temperature.

The operation of the device is as follows: Assuming that hot water is available at the pipe I8 and cold water is available at the pipe [3, it is only necesary to turn the hand wheel 39 in the desired direction. This would rotate the shaft 32 and through the thermostatic element 33, it would rotate the rocker plate 25, changing the relationship between the amount of water, which can flow into the compartment II! from the two pipes I8 and I9 and thereby changing the temperature of the water in the compartment Hi, therefore controlling the temperature of the water which flows from the opening 42.

Now, if the temperature of the hot water changes in either direction or the pressure varies in a manner to effect the thermostatic element 33, then the thermostatic element 33 itself will vary the proportion of the water inlet areas.

In actual practice it is desirable to provide a plurality of depressions 43 in the back of the hub 38 so as to receive the ball detent 40, which is preferably spring urged.

It can be seen that by this arrangement, any

desired temperature within the range of the min-,

imum cold water temperature and the maximum hot water temperature can be obtained by simply rotating the hand wheel 39 and a perfect mixing of the water is obtained thereby.

I claim:

In a device of the class described the combination of a compartment having a pair of inlet openings extending through one side thereof, said opening having the outlet ends thereof inclined with relation to the axes of the openings,

a rocker plate having inclined faces formed thereon adapted to form closures for the respective openings when said plate is rocked to either extreme position, a rock shaft journaling in said container having a hand wheel thereon for rotating same, said hand wheel having a detent for yieldably holding same in a pre-determined position and a thermostatic element connected to said rock shaft and to said rocker plate whereby a change of temperature in said compartment will produce a corresponding movement in said rocker plate and a lowering temperature in said compartment will open the hot water inlet and close the cold Water inlet.

GORDON R. GEMMZEIL.

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

Number Number