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Accessory for detecting leaking of safety valves

  • US 5,323,142 A
  • Filed: 07/17/1991
  • Issued: 06/21/1994
  • Est. Priority Date: 07/17/1991
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting flow of material through a valve, the valve having a moving part, the moving part having a first position at which the valve is fully closed and a second position at which the valve is fully open;

  • the apparatus comprising;

    load detection means for providing a signal representative of a force applied to the load detection means; and

    load generating means for coupling to the moving part of a valve, the load generating means exerting a force on the load detection means corresponding to the relative displacement of the moving part, the displacement of the moving part indicating opening of the valve,wherein the load generating means is comprised of a spring means coupled to a moving part, displacement of the moving part causing compressing in the spring means and wherein the load detection means is comprised of a load cell means and wherein the spring means generates a first load in response to a first displacement of the moving part from the first position which is small relative to the moving part'"'"'s maximum displacement, at which first displacement leaking of fluid through the valve occurs, and wherein the load cell senses the first load indicating the first displacement.

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