Linear drive motor with flexible coupling
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United States of America Patent
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-
Sep 8, 1992
Issued Date -
N/A
app pub date -
Mar 29, 1991
filing date -
Oct 8, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A linear drive motor of a cryogenic refrigerator, where a reciprocating armature is coupled to a piston which alternately compresses and expands a gaseous fluid in a thermodynamic cycle. The piston has a clearance seal and is attached at one end to a flexible coupling to reduce cross-bearing loads exerted by the piston along the clearance seal. A displacer assembly of the cryogenic refrigerator employs a displacer piston that reciprocates along a clearance seal. The displacer piston is coupled to the displacer cylinder and/or the armature of a displacer drive motor by a flexible coupling that reduces radial forces exerted by the displacer piston on the clearance seal.
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