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Integral check, pressure balanced, control valve

  • US 5,425,394 A
  • Filed: 08/17/1993
  • Issued: 06/20/1995
  • Est. Priority Date: 08/26/1992
  • Status: Expired due to Term
First Claim
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1. A shower control valve assembly comprising:

  • a casing having first and second water inlets and first and second water outlets therein;

    a cartridge shell insertable into said casing and having first and second separate inlet chambers in respective communication with said casing inlets;

    said inlet chambers being defined by an annular diaphragm member within said cartridge and a throttle valve unit centrally carried by said diaphragm;

    first and second flow tube members within said throttle valve unit and directed towards the respective casing inlets, each flow tube member having an open outer end and a closed inner end with outlet opening means adjacent the closed end thereof for passing water to a respective throttling portion of said throttle valve unit;

    means in each flow tube member defining a valve seat at the outer open end thereof;

    a check valve member in said flow tube member, adapted to move into and out of engagement with said valve seat to prevent or allow water flow into said flow tube member;

    wall means having first and second valve openings to the first and second chambers respectively;

    a mixing valve disk rotatably mounted in said cartridge in abutting engagement with said wall means;

    the casing having a discharge chamber on the side of said disk away from said inlet chambers and communicating with one of said water outlets; and

    said disk having first and second ports co-operable with the valve openings to pass water from one or both of said inlet chambers to said discharge chamber.

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