Retractable seal for oil-filled rotating machine

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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277 9, 277153, 403 12, 403288, 403359, 464 16, F16J 1532

Patent

active

056475977

ABSTRACT:
A rotating machine has a splined primary shaft rotatably mounted in an opening of an oil-filled housing and a primary seal carried by the housing for sealing with a mating secondary splined shaft upon insertion of the secondary shaft into the housing opening for mating with the primary shaft. A retractable member is carried by the primary shaft for sealing with the primary seal to maintain the oil within the housing prior to the insertion of the secondary shaft and prevent the flow of oil to the spline. Upon insertion of the secondary shaft through the housing opening, the secondary shaft seals with the primary seal to prevent leakage from the housing. Furthermore, the secondary shaft forcibly retracts the retractable member away from the primary seal and establishes a flow path around the retractable member to the secondary shaft so that oil flows to the mating splines of the shafts.

REFERENCES:
patent: 2919939 (1960-01-01), Adresen et al.
patent: 3072413 (1963-01-01), Parks
patent: 3337221 (1967-08-01), Hulsebus
patent: 3577746 (1971-05-01), Dolan
patent: 3621937 (1971-11-01), Edge
patent: 4081218 (1978-03-01), Geabriel
patent: 4817846 (1989-04-01), Eichinger
patent: 5224762 (1993-07-01), Levenstein
patent: 5244215 (1993-09-01), Cather, Jr. et al.

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