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Spring diaphragm

  • US 4,231,287 A
  • Filed: 05/01/1978
  • Issued: 11/04/1980
  • Est. Priority Date: 05/01/1978
  • Status: Expired due to Term
First Claim
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1. A high pressure diaphragm comprisinga generally planar central member having an outer edge, a low pressure side and a high pressure side,a generally planar outer flange-engaging member having an inner edge, a low pressure side and a high pressure side,a rigid, generally planar annular ring member having an outer edge, an inner edge, a low pressure side and a high pressure side,a first means for flexibly connecting said outer edge of said annular ring member to said inner edge of said flange-engaging member, comprisinga first bridge member having a thickness less than the thickness of said annular ring member and fabricated integrally with said annular ring and said flange-engaging member,a second means for flexibly connecting said inner edge of said annular ring member to said outer edge of said central member comprisinga second bridge member having a thickness less than the thickness of said annular ring member and fabricated integrally with said annular ring member and said central member, and,an electroexpansive member located proximate said low pressure side of said central member and adapted to exert force thereon when said electroexpansive member is in its expanded position, andmeans for maintaining said electroexpansive member at all times under compression.

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