Title:
Water supply tank for concrete mixers
United States Patent 2316132


Abstract:
My invention relates to a water supply tank for concrete mixers. It has to do, more particularly, with a control system for controlling the flow of water from the tank into the mixer. This invention is particularly applicable to that type of water supply tank and measuring tank for concrete...



Inventors:
Gebhard, Jaeger
Application Number:
US34852640A
Publication Date:
04/06/1943
Filing Date:
07/30/1940
Assignee:
JAEGER MACHINE CO
Primary Class:
Other Classes:
222/133, 222/412, 222/434, 222/487
International Classes:
B28C7/12
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Description:

My invention relates to a water supply tank for concrete mixers. It has to do, more particularly, with a control system for controlling the flow of water from the tank into the mixer.

This invention is particularly applicable to that type of water supply tank and measuring tank for concrete mixers which is disclosed in United States.Letters Patent of Clarence I. Bohmer and Arthur E. Davis, No. 2,191,419, February 20, 1940.

One of the objects of my invention is to provide a simple-valve control system for controlling the-flow of water from the tank to the mixer.

Another object of my invention is to provide a valve-control system for operating a plurality of valves which is of such a nature that all the valves may be-operated from a single point in an easy and- efficient manner.

Another object of my invention is to provide a booster associated with the tank and the various valves for' forcing the water, withdrawn from the tank through the valves; into the mixer under pressure; the booster being of such a nature that it. will permit by-passing of the water into the mixer when not in operation.

Another object of my invention is to provide-a valve control system and booster of the type- indicated-which are associated with each other and, form a single unit- that may be- readily removed from the tank for replacement of parts.

Various other objects will be apparent fromn the following description.

In the device shown in said'Patent No. 2,191,419, three valves are shown for controlling the flow of water from the tank into the mixer. One of'these valves is employed for allowing the main supply of water in a predetermined amount to flow into, the mixer. The amount supplied is determined by adjustment of a syphon device. Another valve is provided for allowing "tempering water" to flow into the mixer. That is, this valve permits a small amount of additional water to flow into the mixer, if needed, after the said predetermined amount is supplied. The other valve is associated with a wash-water compartment, formed in the tank, and may be operated to permit wash-water to enter the mixer after the mixed material has been discharged..

The present invention relates to a control system for these various valves. According to this invention I provide a simple control system by which.the various valves may be operated from a single point with ease. I also provide a booster associated with the control system for receiving the water allowed to emerge from the tank by operation, of any of said valves and for forcing this water under pressure into the mixer. The valve control system and booster are associated' together as a single unit which may be readily applied to or removed from the tank.

The preferred embodiment of my invention is illustrated in the accompanying drawing wherein similar characters of reference designate corresponding parts and wherein: Figure 1 is a view partly in section and partly in side elevation, showing a water tank with my invention associated therewith.

Figure 2 is a view partly in perspective and partly in section of the control system which I provide.

Figure 3 is an end view, partly broken away, of the structure shown in Figure 2.

Figure 4 is a perspective view illustrating how the water tank, having my invention associated therewith, is disposed, on a mixer.

With reference to the drawing, in Figure 1 I have illustrated a water supply tank i. This tank is adapted to be mounted adjacent to the mixing drum to be supplied with water, as illustrated in Figure 4. As described in said Patent No. 2,191,419, the tank is provided with a vertical partition 3 for dividing the tank into a main compartment 4 and a wash-water compartment 5. A syphon device 6 of the type disclosed in said patent is provided for withdrawing a predeternmined amount of water from the compartment 4. This water leaves the tank through a valve opening 7 in the bottom of the tank. A valve opening 8 is provided for withdrawing "tempering water" from the compartment 4. A third valve opening S is provided for withdrawing wash-water from the compartment 5.

I provide a longitudinally extending tube 10 below the tank. This tube 10 is provided with three upstanding tubular inlets I which are connected to the tank I in association with the openings 7, 8 and 9. The upper end of each of the inlet members II has a peripheral flange 12 formed thereon which is bolted to the tank by means of bolts 13, a gasket 14 being provided between the flange and the tank to prevent leakage. Each valve opening 7, 8 and 9 is under the control of valve mechanism indicated by the numerals 7a, Sa and 9a, respectively.

Each of these mechanisms consists of a piston type valve member 15, which tightly fits within the cooperating member 11 and is adapted to move vertically therein. The member 15 has a depending guide structure 16, in the form of a framework, which also fits tightly within the member II and serves to guide the member 1:5 particularly when it is moved upwardly out of the member II. The guide structure 16 has a depending pin 17 on its lower end. A compres5- sion spring 18 has its lower end disposed in the cup-shaped upper side of the valve member 15.

The upper end of this spring bears against a plate 19. This plate 19 has lugs 20 on its opposite ends which fit into oppositely directea notches formed in the upper ends of a pair of supports 21. These supports 21 are carried by the flange 12 and are diametrically opposed.

The force of the spring 18 will normally hold the plate 19 in position. However, in order to remove the plate 19, it is merely necessary to rotate it in the proper direction so that the lugs 20 will swing out of the notches in the members 21.

Thus, the spring 18 may be readily removed and replaced. The spring 18 normally tends to force the valve member 15 downwardly. It will be understood that when the member 15 is downwardly within the member I , the valve opening will be closed. However, if the member is moved upwardly so that it is disposed above the upper end of member II and the guide portion 16 is still in member I , the valve opening will be opened to permit passage of water therethrough.

In order to operate these valves, I provide the following structure. A shaft 22 extends longitudinally through the tube 10. This shaft is rotatably mounted in a bearing 23 in one end of the tube and in a sleeve 24 disposed at the other end of the tube. This sleeve 24 will rotate in a bearing 25 disposed in the end of tube 10 and on the shaft 22. The shaft 22 has keyed thereon a cam 7b and a cam 8b. These cams will contact with the pins 17 of the valve operating mechanisms 7a and 8a. The sleeve 24 carries on its inner end a cam 9b which is adapted to contact with pin 17 of the valve operating mechanism 9a. The sleeve 24 has a handle lever 26 keyed on its outer end by means of which it may be rotated. The shaft 22 has a handle lever 27 keyed on its outer end by means of which it may be rotated. A disc member 28 is disposed on the outer end of the tube 10 and is associated with handle members 26 and 27, as indicated.

Pins 29 and 30 on the disc limit movement of the handle 26 which controls the wash-water valve mechanism 9a. The pin 30 and an additional pin 31 control movement of the handle 27 which controls the main water supply valve mechanism 7a and the tempering water supply valve mechanism 8a.

The cams 7b and 8b are so disposed relative to each other that when the handle 27 is rotated from the intermediate point, indicated in Figure 3, towards the pin 31, the valve mechanism la will be operated to open the valve, and when the handle is rotated towards the pin 30, the valve mechanism 8a will be operated to open the valve. These two valves may be operated independently of the valve mechanism 9a. The valve mechanism 9a is operated merely by moving handle 26 between the pins 29 and 30.

An outlet portion 32 leads from the bottom of tube 10. This outlet is connected to a booster housing 33. This booster housing 33 incloses a rotatable member 34 which carries a suitable blade or vane that tends to force the water downwardly. The blade is preferably helically arranged. This member 34 is driven by a shaft 35 which may be connected to any suitable source of power preferably the transmission 35a (Figure 4) of the mixer drum rotating mechanism. The member 34 is of such a nature and fits in housing 33 with clearances so that it will permit a free flow of water past it, even if it is not rotating. The discharge line 36 of the booster is connected to a pipe 37 which extends axially into the mixer drum and which may carry a water distributing device 38. This device 38 may be of the type disclosed in my co-pending application 201,250, filed April 11, 1938, Patent 2,225,374.

It will be apparent that all of the water which flows from the tank through the openings 7, 8 and 9 will enter into the tube 10. This water will then flow through the outlet 32. The booster will force the water under pressure through the discharge pipe 36 into the pipe 37.

It will be apparent from the above description that my invention has a number of advantages.

I provide a simple and efficient valve control system for controlling the flow of water from the tank to the mixer. All of the valves may be selectively operated from a single point with ease.

Furthermore, the booster which I provide will force the water, leaving the tank through the various valve controlled openings, into the mixer.

If the booster becomes inoperative for any reason, for example failure of the source of power, tIhe water can still flow past the booster into the mixer. My device constitutes a single unit which may be readily removed from the tank and replaced in order to renew certain parts.

Various other advantages will be apparent from the drawing and the following claims.

Having thus described my invention what I claim is: 1. In combination with a water supply tank having a plurality of outlets, a housing connected to all of said outlets, valve mechanism for controlling each of said outlets, said mechanism normally keeping the valve closed, means for opening said valves, said means comprising a rotatable shaft extending through said housing and carrying cams adapted to engage some of said valve mechanisms, a rotatable sleeve disposed on said shaft and carrying at least one cam adapted to engage one of said valve mechanisms, and means for rotating said shaft and said sleeve independently of each other from a point outside of said housing.

2. In combination with a water supply tank having a plurality of outlets, a housing connected to all of said outlets, valve mechanism for controlling each of said outlets, said mechanism normally keeping the valve closed, means for opening said valves, and means comprising a rotatable shaft extending through said housing and carrying cams adapted to engage some of said valve mechanisms, a rotatable sleeve disposed on said shaft and carrying at least one cam adapted to engage one of said valve mechanisms, means for rotating said shaft and said sleeve independently of each other from a point outside of said housing, said housing being provided with an outlet, a booster housing connected to said outlet, and a booster disposed in said housing for forcing the water which leaves said tank through said outlet to the point where it is to be used.

3. The combination set forth in claim 2 wherein the booster is of such a nature that it will permit flow of water past it when it is not operating.

4. In combination with a water supply tank having a plurality of outlets, a housing connected to all of said outlets, valve mechanism for con(5 trolling each of said outlets, means for operating said valve mechanisms, said means comprising a rotatable shaft extending through said housing and carrying at least one cam adapted to engage one of said valve mechanisms, a rotatable sleeve disposed on said shaft and carrying at least one cam adapted to engage one of said valve mechanisms, and means for rotating said shaft and said sleeve independently of each other from a point outside of said housing.

GEBHARD JAEGER.