Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
1999-05-10
2001-04-03
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C251S235000
Reexamination Certificate
active
06209581
ABSTRACT:
The invention relates to a mixing valve battery cartridge used for mixing cold and warm water, having said cartridge one inlet disc and one control disc arranged one above the other and forming a plane sealing together.
The invention is intended to implement a mechanism to mix cold and warm water as well as to release and shut off the water flow, respectively, which combines the advantages of mixing valves using either plane ceramic discs and or a sphere as control element. The mixing valves of plane disc are of long service life; however, due to their structural constraints, the outlet pipes of valve batteries have to bypass their inlet pipelines; therefore, their space requirement is high.
The mixing valves using spherical control element contain sliding sealing made of rubber or some rubber-like material which get damaged within short time; nevertheless, they are of low space requirement. A solution of this kind is described in U.S. Pat. No. 4,838,304.
The mixing valve with plane disc controlled by spherical segment does not contain elastic sliding sealing. The mixed water outlet is directed toward the outlet pipeline; thus, its mounting space requirement is low, while its service life is the same as the mixing valves using plane discs—all these features are added to the customary operational parameters and range of motion.
The invention implements the objective set that the upper control disc is driven by an arm in a manner that each point of the arm displaces along a spherical surface the center of which lies beyond the arm. This movement of the arm is insured by the fact that the lower and/or upper bushing surface are/is designed as a spherical surface, wherein said spherical surface is located next to a further spherical surface, preferably between two spherical surfaces, that is, between the lower surface of the cover and the upper surface of the spacer. The opening on the cover allows the driving arm to be moved together with the bushing while its lower end connected to the driving disc made of ceramics moves the latter into a position determined by the position of the driving arm, while also moving the control disc connected to the driving disc made of ceramics along a plane surface according to their guide.
In this embodiment, the driving arm can be freely rotated around its axis.
This embodiment allows one to implement valve batteries in which the driving arm controlling the flow and mixing ratio functions as a control stick.
In order to mount a customary valve battery shaft as the driving arm, the driving arm shall be prevented from rotating around its axis. An exemplary solution is shown in
FIG. 2
where the bushing that is made of a single piece in the basic embodiment is divided into two parts, i.e. the so called upper bushing which in itself has two spherical surfaces guided within the cover so as to allow the displacement along an arc only in the direction of closing and opening, on the one hand, and the lower bushing arranged below the upper bushing, which also has two spherical surfaces and moves together with the upper bushing in the direction of closing and opening, while it is guided in the upper bushing when moved at right angles to the direction of opening and closing to allow the mixing ratio to be controlled, on the other hand.
REFERENCES:
patent: 3415281 (1968-12-01), Perlman
patent: 3041696 (1982-06-01), None
patent: 3245898 (1984-06-01), None
patent: 0238674 (1987-09-01), None
patent: 9005868 (1990-05-01), None
Bachman & LaPointe P.C.
Fox John
Kerox-Multipolar II. Kft
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