Sealing member

Details Sealing member Sealing member

2005-11-22

2008-08-19

Rivell, John (Department: 3753)

Valves and valve actuation

Reciprocating valve

Particular head and seat cooperation

C277S626000, C277S549000, C277S644000, C277S642000, C251S356000

Reexamination Certificate

active

07413164

ABSTRACT:
A rubber (elastic substance) is attached by vulcanization and an annular sealing member4is formed in an annular groove3having a step and provided in the bottom wall of a body2of a valve disc1. The sealing member4has an annular portion41and an annular portion42. Most of the annular portions41, 42are located in a deep groove portion31and a shallow groove portion32, respectively, and the volume of the annular portion41is larger than the volume of the annular portion42. Furthermore, an annular protrusion43, which protrudes downward, is provided in the boundary region between the annular portions41, 42. An inclined section that is inclined at the prescribed inner angle Q is also formed in the boundary region.

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