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SAFETY SHUTOFF VALVE STRUCTURE AND METHOD

  • US 3,705,594 A
  • Filed: 07/01/1971
  • Issued: 12/12/1972
  • Est. Priority Date: 07/01/1971
  • Status: Expired due to Term
First Claim
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1. Safety shutoff valve structure for maintaining a normally closed valve open until the occurrence of a predetermined condition and permitting the valve to close on the occurrence of the predetermined condition comprising a valve, means connected to the valve normally biasing the valve into a closed position, means adapted to be connected to the valve for opening the valve and retaining the valve in an open position in opposition to the means for biasing the valve into a closed position and means operably connected to the means for opening the valve and retaining it in the open position for disconnecting the means for opening the valve and retaining the valve in the open position from the valve, which last mentioned means is responsive to the predetermined condition.

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