Low friction linear clearance seal

Details Low friction linear clearance seal Low friction linear clearance seal

1997-02-05

1998-10-20

Kilner, Christopher

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

60520, F25B 900

Patent

active

058229949

ABSTRACT:
This invention provides a low friction linear clearance seal for use in closed cycle cryogenic coolers. The clearance seal comprises a cylinder, a piston mounted within the cylinder for reciprocating movement and a self lubricating polymer liner bonded to the piston which forms an effective seal around the piston. The clearance seal improves the sealing capability between the piston and the cylinder and reduces heat generated by the motion of the piston along the cylinder wall. The clearance seal also improves the performance and reliability of the cryogenic cooler.

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patent: 5522214 (1996-06-01), Beckett et al.
patent: 5642623 (1997-07-01), Hiresaki et al.

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