Fluid handling – Systems – Multi-way valve unit
Patent
1982-04-05
1984-02-07
Cohan, Alan
Fluid handling
Systems
Multi-way valve unit
251 38, 251 51, F16K 1102
Patent
active
044297157
ABSTRACT:
A mixing valve for hot and cold domestic water has a control member (20,22 and 23) movable within a body (12) whereby axial movement of the control member controls opening and closing of communication from hot and cold inlets (13 and 14) to an outlet (32, 2) and rotation of the control member controls the relative proportions of fluid flow from respective inlets to the outlet. A pressure chamber (90) is supplied with pressure fluid from the inlets for assisting closing action of the valve upon closure of a vent (28,30) from the pressure chamber. In order to resist pressure surges at either inlet a restricted aperture (83) is provided to reduce flow from a reducing volume movement damping chamber towards the end of closing movement of the valve control member to prevent the final portion of the valve closing movement being too sudden.
REFERENCES:
patent: 2547254 (1951-04-01), Braithwaite
patent: 2708092 (1955-05-01), Smith
patent: 2712324 (1955-07-01), Lund
patent: 4241759 (1980-12-01), Billeter
patent: 4245813 (1981-01-01), Grenier
Cohan Alan
Goldsmith Patent Holdings (Sevenoaks) Limited
Rivell John A.
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