Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Patent
1997-05-19
1998-11-10
Nicholson, Eric K.
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
277438, 277562, F16J 1532
Patent
active
058332456
ABSTRACT:
An elastomer ring seal for pressurized fluids that is particularly suited for preventing unidirectional fluid flow between outer and inner cylindrical surfaces of two or more mating members, which resists permanent deformation, and is highly leak resistant.
The ring seal has an annular body with a central longitudinal axis and an irregular polygonal profile in right cross section comprising a solid base portion at its back axial end, concentric outer and inner asymmetrical independent arm members axially extending from said base portion to its front axial end. The arm members are set apart from each other by a deep annular depression which forms opposing radial walls of said arm members.
The outer arm, configured to resist compression strain, includes; an outermost radial sealing portion near midpoint along the arm length; and includes a supporting narrow section toward the base portion, forming a thin flexible conical band around the ring seal outer side.
The inner arm, configured to resist expansion strain, includes; an innermost radial sealing portion at midpoint along the arm length; and includes a supporting long tapering section with a thin locus at the base portion, forming a flexible circular hinge-like joint around the ring seal inner side.
Outer and inner arm members include flexible elements toward the front axial end, which provide means to retain elastic potential energy, thereby contributing additional resilient support for each arm member under strain. The flexible elements include angular surfaces which form lead-in bevels providing damage resistant ease of assembly of mating members.
REFERENCES:
patent: 3653670 (1972-04-01), Sifri et al.
patent: 4111441 (1978-09-01), Sick et al.
patent: 4417503 (1983-11-01), Izumi
patent: 5265890 (1993-11-01), Balsells
patent: 5269537 (1993-12-01), Kiesel
Binda Greg
Nicholson Eric K.
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