F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/48
F16J 15/34 (2006.01) B60T 1/06 (2006.01) B62D 55/088 (2006.01) F16D 65/853 (2006.01)
Patent
CA 1159490
Pressure Balanced - Constant Engagement Force Seal Abstract of the Disclosure A seal apparatus for sealing between relatively rotatable structures is provided and has a pair of seal rings which are engageable at axial sealing face portions. Axially facing surfaces of the first seal ring are arranged such that fluid pressure acting thereon biases it in a first direction. Axial positioning and circumferential retention of the second seal ring is provided by an elastomeric toric which is arranged radially between the second seal ring and a retaining ring structure which constitutes a part of the relatively rotatable structure. Axially facing surfaces of the second seal ring and the sealing toric have areas in the axial direction which cause the second seal ring to be pressure balanced in the axial direction by fluid pressure exerted thereon. A Belleville spring is arranged axially between the retaining ring structure and the second seal ring and is prestressed to provide a constant axial force against the second seal ring. The toric 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 and retaining ring structure.
389402
Clark Ernest B. III
Reinsma Harold L.
Caterpillar Tractor Co.
Kirby Eades Gale Baker
LandOfFree
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