Damping mechanism having a pressure actuated orifice seal and a compact internally disposed pressure relief assembly
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United States of America Patent
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May 27, 2003
Grant Date -
N/A
app pub date -
Oct 13, 2000
filing date -
Oct 13, 2000
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A single-use damping mechanism. A piston assembly fits within a chamber defined by a piston receiving member. The distal end of the piston receiving member includes a first and second passages which are disposed in fluidic series between the chamber and the ambient air. The first, inner passage is relatively small and controls the damping time of the mechanism. The second, outer passage is relatively large and holds a sealing assembly that prevents fluid from escaping from the chamber, through the first passage, until the mechanism is to be used. The piston assembly includes a pressure relief assembly, which comprises a cavity filled with a compressible material, into and out of which fluid can flow as necessary to protect the mechanism from temperature related pressure changes, and yet which does not interfere with the damping characteristics of the mechanism.
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