Sealing device for reciprocating shaft

Details Sealing device for reciprocating shaft Sealing device for reciprocating shaft

2005-03-17

2010-02-23

Pickard, Alison K (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

C277S437000, C277S562000

Reexamination Certificate

active

07665740

ABSTRACT:
A sealing device for a reciprocating shaft capable of providing sufficient pressure tightness to a main lip and preventing troublesomeness of an assembling operation. The sealing device, which is interposed between a shaft and an outer peripheral member, includes a washer, a main lip integrally bonded to a sealed space side of the washer and slidably brought into close contact with an outer peripheral surface of the shaft, an auxiliary lip integrally formed in an outer peripheral side thereof, a backup ring fitted between an atmosphere side of a slidable surface of the main lip and an inner peripheral portion of the washer, and bearing the main lip from the atmosphere side and the inner peripheral side, a dust lip integrally bonded to the atmosphere side of the washer and slidably brought into close contact with the outer peripheral surface of the shaft, and an outer peripheral lip integrally bonded to an outer peripheral portion of the washer and brought into close contact with the outer peripheral member.

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