Seal assembly for reciprocating shaft

Details Seal assembly for reciprocating shaft Seal assembly for reciprocating shaft

2003-10-22

2009-10-06

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal for well apparatus

For below ground apparatus

C277S338000, C277S342000, C277S518000

Reexamination Certificate

active

07597328

ABSTRACT:
A seal assembly for a reciprocating shaft includes a body having a bore and a shaft adapted to move reciprocally within the body between an extended position extending from the body and a retracted position retracted within the body. The shaft has a first seal travel area which is in contact with a first seal during axial reciprocating movement of the shaft. The shaft has a second seal travel area which is in contact with a second seal during axial reciprocating movement of the shaft. The first seal travel area and the second seal travel area are axially spaced separate and distinct areas on the shaft. Damage to the exposed portion of the first seal travel area leading to a failure of the first circumferential seal, does not lead to failure of the second circumferential seal.

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