Method of making captive O-ring face seal

Details Method of making captive O-ring face seal Method of making captive O-ring face seal

1995-06-05

1996-10-15

Schwartz, Larry I.

Metal working

Method of mechanical manufacture

Assembling or joining

2989014, 29237, 285379, 277170, B23P 1102

Patent

active

055641776

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: 944423 (1909-12-01), Feix
patent: 1523817 (1925-01-01), Long
patent: 3224080 (1965-12-01), Bryant et al.
patent: 3586350 (1971-06-01), Ashton
patent: 3831951 (1974-08-01), Patel et al.
patent: 3981066 (1976-09-01), Calvert
patent: 4073307 (1978-02-01), Royce
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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