Shaft seal

Details Shaft seal Shaft seal

1975-02-19

1976-06-15

Rothberg, Samuel B.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 59, 277 67, 277 73, 277134, F16J 1540

Patent

active

039632474

ABSTRACT:
A visco-type seal is disclosed wherein a sealing pressure is built up in a fluid by means of one or more helical windings, the fluid being enclosed in a narrow clearance between a stator and a rotor. The alignment of the rotor within the stator is insured by providing a thin layer of material at the outer ends of at least one of the helical windings so that the clearance in a radial direction between the stator and the rotor at this location is less than the clearance existing in a radial direction between the helical windings and the stator. In one embodiment, the stator is designed as a sleeve which has a flexible connection in the radial direction with respect to a wall. The stator or a sealing element fastened thereto is movable in an axial direction by means of a resilient force to obtain a proper sealing when the device is at rest.

REFERENCES:
patent: 1770496 (1930-07-01), Lawaczeck
patent: 3051497 (1962-08-01), Wigg et al.
patent: 3076656 (1963-02-01), Hofmann
patent: 3558238 (1971-01-01), Van Herpt
patent: 3622164 (1971-11-01), Herbert
patent: 3746350 (1973-07-01), Mayer

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