Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening
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United States of America Patent
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Jun 1, 1993
Issued Date -
N/A
app pub date -
Feb 13, 1992
filing date -
Sep 14, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
A pressure equalizing membrane made of gas permeable, water impermeable polytetrafluoroethlyene is preassembled to a retaining ring and the ring retained within a housing wall with a watertight seal. Either a one or two part retaining ring is used as a holder for the PTFE membrane. The retaining ring is provided with at least one circumferential elastic sealing lip about its periphery for providing a press fit of the membrane and retaining ring assembly into the housing wall opening, and for providing a watertight seal about the membrane.
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