Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1987-03-27
1988-05-31
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277183, 277184, 277208, 277214, 277236, 285108, 285110, 2851371, 285917, F16J 1502, F16L 1702, F16L 3900
Patent
active
047476060
ABSTRACT:
A bi-directional metal-to-metal seal (10) comprising a ring with a pair of oppositely acting sealing elements (20 or 22) integral with the outer periphery of the ring. In one embodiment, two pairs of such sealing elements (20 and 22) are located on each end of the ring (as viewed in cross section) and are of a thickness to be resilient (springy) and deflectable when inserted in an interference fit relationship into a cylindrical wall or bore to be sealed. The first sealing element (24) has a curved outer surface (26) and with an opening (30) facing the main flow path of pressure fluid. The curved outer surface rolls inward against the cylindrical wall (42) while being inserted into the cylinder, partially closing the opening (30) but still allowing the pressure fluid to enter and urge the curved surface against the cylindrical wall. The second sealing element (32) also has a curved outer surface (36) and is of a thickness to be flexible and springy and likewise deflectable (rollable) into the cylindrical surface (26) in an interference fit relationship. The second sealing element (32) has a wall (34) which is open towards a second fluid under pressure so that the seal elements are operable in two directions. The latter sealing elements are similar but oppositely arranged for sealing against leakage between the two pairs and in either direction of flow through the pipe or flow path. In the embodiment having two pairs of bi-directional seal elements, there is a center area (16) of larger diameter than the sealing elements (20 and 22) for retention in a retainer (52) so that a cluster of such seals can be retained as an assembly of seals.
REFERENCES:
patent: 1139396 (1915-05-01), Barthel
patent: 1830937 (1931-11-01), Falkenstein
patent: 2474564 (1949-06-01), Zoromskis
patent: 2772931 (1956-12-01), Biedermann
patent: 2915348 (1959-12-01), Arnold et al.
patent: 3352212 (1967-11-01), Read
patent: 3493147 (1970-02-01), Ballin
patent: 3563557 (1971-02-01), Doutt
patent: 4075935 (1978-02-01), Panigati
Dwyer Joseph R.
Shoap Allan N.
Vetco Gray Inc.
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