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Check valve system for fire extinguisher

  • US 4,890,677 A
  • Filed: 08/24/1988
  • Issued: 01/02/1990
  • Est. Priority Date: 08/24/1988
  • Status: Expired due to Fees
First Claim
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1. In a chemical fire extinguisher system, a chemical flow check system comprising:

  • check valve means having selectably open and closed states, said check valve means having associated therewith a resilient biasing element for urging flow control surfaces of said check valve means into communication with one another, whereby said check valve means is urged in the direction of said closed state;

    carrier means having a first chemical flow channel therein, said first chemical flow channel being adapted to engage sealingly with said check valve means for controlling chemical flow through said first chemical flow channel in response to said selectably open and closed states of said check valve means;

    actuator means having a check valve engagement portion arranged to be in communication with said first chemical flow channel of said carrier means for actuating said check valve means, said actuator means further having a second chemical flow channel therein and arranged to communicate with said first chemical flow channel;

    coupler means for removably coupling said carrier means and said actuator means in a predetermined orientation with respect to one another whereby, when said coupler means is completely coupled with said carrier means, said actuator means is in an engaged relationship with said check valve means, and as said coupler means is uncoupled from said carrier means, said actuator means assumes a disengaged relationship with said check valve means, said engaged and disengaged relationships corresponding to open and closed states, respectively, of said check valve means;

    pressure chamber means coupled to said coupler means and arranged to be in fluid communication with said second chemical flow channel of said actuator means, for receiving at least a portion of said chemical flow through said first and second chemical flow channels when said check valve means is in said open state; and

    control valve means arranged in fluid communication with said pressure chamber means, said control valve means having a closed state for permitting a static pressure to be retained in said pressure chamber means, and an open state for venting said pressure in said pressure chamber means.

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