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SAFETY VALVE WITH INERTIAL OPENING CONTROL

  • US 3,787,067 A
  • Filed: 11/18/1971
  • Issued: 01/22/1974
  • Est. Priority Date: 11/18/1970
  • Status: Expired due to Term
First Claim
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1. An inflatable air cushion safety fluid system for controlling the expulsion of gas comprising:

  • an inflatable cushion device;

    a source of expanding gas;

    a cylinder body having a discharge opening at one end, connected to the inflatable cushion device, and an evacuation opening at the opposite other end, the cylinder body further having a lateral fluid inlet opening adjacent the discharge opening;

    a piston slidably positioned within the cylinder body so as to close the discharge opening in its normal at rest position, the piston having a port in its lateral wall providing fluid communication between the lateral fluid inlet and the evacuation opening;

    a compression spring mounted in the cylinder body to bias the piston against the discharge opening, the valve is mounted so that a large inertial force will force the piston against the compression spring and permit fluid communication between the lateral fluid inlet opening and the discharge opening whereby the gas can inflate the cushion device; and

    means for controlling said source of expanding gas comprising a deceleration responsive control device which normally confines said gas to said source of expanding gas but which permits said gas to enter said cylinder body through said later fluid inlet therein when said means are subjected to a deceleration in a predetermined direction at least equal to a predetermined value.

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