Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1994-12-09
1997-03-04
Cummings, Scott
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277136, 277 37, 264268, F16J 1532
Patent
active
056071680
ABSTRACT:
A shaft seal includes a case defining an axial portion and a radial portion, and a resilient PTFE sealing member is secured to the case by an elastomeric material, such as rubber, in an injection molding process. The elastomeric material forms an outer ring encasing the case axial portion and the outer portion of the resilient sealing element. The resilient sealing element is initially in the form of a disc-like member having a central aperture, and the shaft seal is formed by clamping the disc-like member and the case together within a pair of mold sections defining mold cavities corresponding to the desired final shape of the elastomeric material. After the elastomeric material has hardened, the seal is placed against a base and a mandrel is used to deflect the inner portion of the resilient sealing member relative to the outer portion. The seal may further include an excluder lip seal formed of the elastomeric material integrally with the ring. The excluder lip seal extends inwardly from the inner edge of the case radial portion, in a direction opposite that of the inner portion of the resilient sealing member.
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Albert Trostel Packings, Ltd.
Cummings Scott
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