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Cock apparatus of automatic ignition type for gas appliance

  • US 4,110,065 A
  • Filed: 05/16/1977
  • Issued: 08/29/1978
  • Est. Priority Date: 01/14/1976
  • Status: Expired due to Term
First Claim
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1. A cock apparatus of automatic ignition type for use in a gas appliance comprising:

  • a frame member;

    a cock body mounted on one side of said frame member and having an internal space;

    an ignition handle having a shaft extending at one end portion thereof into the internal space of said cock body and at the other end portion thereof toward the exterior through said frame member;

    a valve member disposed within the internal space of said cock body for rotation with the turning movement of said ignition handle thereby permitting supply and shut-off of the flow of combustible gas toward a main burner and a pilot burner;

    a spark generator generating sparks for igniting said pilot burner in response to the turning movement of said ignition handle; and

    a device affixed to said cock body for preventing leakage of live combustible gas;

    said live gas leakage preventive device comprising a casing mounted on the end face of said cock body, a rotary shaft journaled in said casing and capable of free rotation and restrained rotation relative to said valve member, spring means mounted on said rotary shaft for normally urging said rotary shaft in the closing direction of said valve member, heat sensor means mounted on said casing for sensing ignition and non-ignition of said burner, engaging means for forcedly interrupting the operation of said spring means by cooperating with said heat sensor means when said main burner is properly ignited, and means for releasing said engaging means thereby permitting said spring means to exert its resilient returning force at a constant speed when said heat sensor means does not operate or ceases to operate due to ignition failure or accidental flame extinction of said main burner.

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