Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1985-08-05
1986-12-02
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277227, 277235R, 277235B, F16J 1510
Patent
active
046259791
ABSTRACT:
A gasket assembly having a gasket member defining an opening therethrough and a substantially flat surface portion around the opening is disclosed herein. A first low extrusion-resistant elastomeric sealing bead is disposed on the flat surface portion of the gasket member circumscribing the opening. A second high extrusion-resistant bead is disposed on the flat surface portion of the gasket member circumscribing the opening and lying closely adjacent to the first sealing bead. A third high extrusion-resistant bead is disposed on the flat surface portion of the gasket member circumscribing the opening and lying closely adjacent to the first sealing bead, the second and third beads straddling the first sealing bead. The first sealing bead has an overall height which is greater than the heights of the second and third beads. When said gasket member is placed under compression, the second and third beads restrict displacement of the first bead to prevent extrusion of the first sealing bead. Preferably, the volumes of the spaces between the first sealing bead and the second and third beads is less than the volume of the first sealing bead which lies above an imaginary line connecting the uppermost edges of the second and third sealing beads so that under compression by a compressing surface, the displacement of the first sealing bead is confined by the second and third beads and the first sealing bead material remains as the primary seal against a compressing surface. A method of making the gasket assembly is also disclosed.
REFERENCES:
patent: 3531133 (1970-09-01), Sheesley et al.
patent: 3565449 (1971-02-01), Ascencio et al.
patent: 3794333 (1974-02-01), Czernik et al.
patent: 4095809 (1978-06-01), Smith
Felt Products Mfg. Co.
Shoap Allan N.
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