Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1980-12-08
1982-05-04
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 27, 277 82, 277 85, 277 92, F16J 1538, F16J 1548
Patent
active
043279210
ABSTRACT:
A seal apparatus (40) for sealing between relatively rotatable structures (12,14) is provided and has a pair of seal rings (62,64) which are engageable at axial sealing face portions (70,72). Axially facing surfaces (78,80) of the first seal ring (62) are arranged such that fluid pressure acting thereon biases it in a first direction. Axial positioning and circumferential retention of the second seal ring (64) is provided by an elastomeric toric (68) which is arranged radially between the second seal ring (64) and a retaining ring structure (46) which constitutes a part of the relatively rotatable structure (14). Axially facing surfaces (82,84,96) of the second seal ring (64) and the sealing toric (68) have areas in the axial direction which cause the second seal ring (64) to be pressure balanced in the axial direction by fluid pressure exerted thereon. A Belleville spring (88) is arranged axially between the retaining ring structure (46) and the second seal ring (64) and is prestressed to provide a constant axial force against the second seal ring (64). The toric (68) is engaged only on its radial extremes and thus may readily roll about its circular, central axis, but, when suitably radially compressed, will not readily slide circumferentially or axially relative to the second seal ring (64) and retaining ring structure (46).
REFERENCES:
patent: 2087313 (1937-07-01), Bigelow et al.
patent: 2470419 (1949-05-01), Voytech
patent: 2599034 (1952-06-01), Wilkinson
patent: 2710206 (1955-06-01), Huber
patent: 2814513 (1957-11-01), Kupfert et al.
patent: 3136389 (1964-06-01), Cummins
patent: 3157404 (1964-11-01), Doble
patent: 3198529 (1965-08-01), Voitik
patent: 3540743 (1970-11-01), Ashton et al.
patent: 3926443 (1975-12-01), Feverty et al.
patent: 4077634 (1978-03-01), Durham
patent: 4212475 (1980-07-01), Sedy
Clark, III Ernest B.
Reinsma Harold L.
Caterpillar Tractor Co.
Keen Joseph W.
Ward, Jr. Robert S.
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