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Fuel Cells

Sealing-device

Primary electrochemical cell capable of high discharge rates

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Sealing device

Details

Inventors: Thate, Kurt; Bruckl, Konrad;
Assignee: AGFA-Gevaert AG (Leverkusen, DE)
Primary Examiner: Rosenthal; Arnold
Assistant Examiner:
Attorney, Agent or Firm: Kontler; Peter K.

A sealing device which can open or seal a gap between two spaces that are maintained at different pressures has two members provided with surfaces flanking the gap and a seal which is received in a recess provided in one of the surfaces and extending transversely of the gap. The seal has a first section constituting a diaphragm or a hose which is secured to the recessed member and a second section resembling a flap integral with but pivotable relative to the first section at that side of the first section which is nearer to the low-pressure space. The first section is deformable in response to admission of pressurized fluid against one of its sides whereby the other side moves the flap, or at least the free marginal portion of the flap, against the surface of the non-recessed member. Once the flap is moved to the sealing position, that side thereof which faces away from the gap is or can be exposed to the action of pressurized fluid in the high-pressure space so that the flap continues to sealingly engage the non-recessed member even if the application of fluid pressure against the one side of the first section of the seal is terminated.

DETAILED DESCRIPTION What is claimed is: 1.
A device for sealing a gap between a first space and a second space wherein the pressure exceeds, at least at times, the pressure in said first space, comprising first and second members respectively having first and second surfaces disposed at the opposite sides of and flanking said gap, the surfaces of one of said members having a recess extending substantially transversely of said gap; a seal mounted in said recess and including a deformable first section having a first side facing said gap and a second side located opposite said first side, a second section movably installed between said first section and the other of said members and having first and second portions respectively disposed nearer to said first and second spaces, and means for securing said second section to said one member so as to enable at least said second portion to move toward and away from said other member; a source of pressurized fluid; and means for admitting fluid from said source against said second side of said first section to thereby move said first side toward said gap and to thus effect the movement of at least said second portion of said second section into sealing engagement with the surface of said other member, said second section having a side facing away from said gap and being exposed to pressure in said second space in response to admission of pressurized fluid against said second side of said first section so that the pressure which is applied against said side of said second section maintains said second portion of said second section in sealing engagement with the surface of said other member as long as the pressure in said second space exceeds the pressure in said first space and regardless of whether or not pressurized fluid is evacuated from said second side of said first section subsequent to movement of said second section into sealing engagement with said other member.
2.
A device as defined in claim 1, wherein said first section of said seal has spaced-apart first and second marginal portions extending transversely of said gap, and further comprising means for maintaining at least one of said marginal portions in sealing engagement with said one member

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