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Fire sprinklers with frangible body closing a flow passage and separate means for shattering same

  • US 4,896,728 A
  • Filed: 09/26/1988
  • Issued: 01/30/1990
  • Est. Priority Date: 10/02/1987
  • Status: Expired due to Fees
First Claim
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1. A fire sprinkler comprising a flow passage extending from an inlet to an outlet, a fluid distributor positioned beyond the outlet, a frangible body closing the flow passage, separate means actuated by a temperature-responsive element of a shape-memory alloy for shattering the frangible body to allow passage of fluid on detection of predetermined temperature-rise conditions, said element itself generating the force required to shatter said frangible body.

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