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Combined safety blow-out and gas permeable membrane for galvanic cells

  • US 3,218,197 A
  • Filed: 09/20/1963
  • Issued: 11/16/1965
  • Est. Priority Date: 02/25/1960
  • Status: Expired due to Term
First Claim
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1. IN A GALVANIC CELL HAVING A CUP-SHAPED CONTAINER AND SEALED IN THE OPEN END OF SAID CONTAINER A CELL CLOSURE COMPRISING AN ANNULAR U-SHAPED SEAL GASKET HAVING A CENTRAL APERATURE THEREIN, A RIGID ANNULAR COVER DISPOSED IN THE U OF SAID GASKET AND HAVING A VENTING APERTURE THEREIN, AND A RIVET EXTENDING THROUGH SAID CENTRAL APERTURE AND COMPRESSING SAID GASKET BETWEEN SAID COVER AND SAID RIVET;

  • THE IMPROVEMENT WHEREIN SAID SEAL GASKET IS COMPOSED OF A GAS PERMEABLE MATERIAL RESISTANT TO COLD FLOW AND WHEREIN SAID SEAL GASKET HAS AT LEAST ONE COMBINED SAFETY BLOW-OUT AND VENTING MEMBRANCE CONSISTING OF AN INTEGRAL PORTION OF SAID GASKET THINNER THAN ADJACENT AREAS OF SAID GASKET, SAID MEMBRANE BEING SUFFICIENTLY THIN TO EFFECT A RUPTURE AT EXCESSIVE PRESSURES WITHIN SAID CELL.

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