Captive O-ring face seal

Details Captive O-ring face seal Captive O-ring face seal

1993-04-06

1996-02-13

Kashnikow, Andres

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277207A, 285379, F16J 1510

Patent

active

054906806

ABSTRACT:
A fitting body is provided with a lip that protrudes radially from at least one of the side walls of the seal groove in the sealing face toward the other side wall to form an undercut whereby an annular seal is trapped axially behind the lip to prevent the annular seal from falling out of the groove. The lip is formed by forming the fitting body with a ledge that is integral with the fitting body and protrudes axially from the sealing face adjacent one of the side walls of the groove in the sealing face. The ledge is then flattened to form the lip and an annular seal such as an elastomeric O-ring seal is then inserted into the groove with the annular seal being mechanically trapped axially behind the lip to prevent the annular seal from falling out of the groove.

REFERENCES:
patent: 329931 (1888-11-01), Prindle
patent: 1523817 (1925-01-01), Long
patent: 3586350 (1971-06-01), Ashton
patent: 3831951 (1974-08-01), Patel et al.
patent: 4258925 (1981-03-01), Guyton
patent: 4519636 (1985-05-01), Tomlin et al.
patent: 4886303 (1989-12-01), Carson et al.
patent: 5087504 (1992-02-01), Kanai et al.
Drawings Showing Prior Art Valve Assembly, Exhibits A1-A2.
Drawings Showing Prior Art Valve Assembly, Exhibits B1-B3.

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