Rotary seal unit

Details Rotary seal unit Rotary seal unit

1980-01-30

1981-10-13

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 81R, 277DIG8, F16J 1534

Patent

active

042944546

ABSTRACT:
A rotary seal unit is fitted between a shaft and a surrounding member. The unit comprises a runner fixed to the shaft and within an outer housing fixed to the surround member. Mating sealing rings are carried one by the housing and the other by the runner. One of the rings is axially fixed while the other is axially slidable and urged by springs towards said one ring. The housing encloses and protects the sealing rings prior to and during fitting. A soft (or hard) setting ring may be provided to axially locate the axially fixed ring and the component carrying the other ring, but permitting rotation between them, so that the spring loading of the rings is not disturbed during fitting. The softer material wears away in use. The setting ring also protects against entry of dirt. An annular bearing can provide a similar result. The seals within the unit can be provided in axially spaced pairs, defining a space between them.

REFERENCES:
patent: 2820653 (1958-01-01), Yokel
patent: 2859054 (1958-09-01), Willi
patent: 2931631 (1960-04-01), Harrison
patent: 3122373 (1964-02-01), Lee et al.
patent: 3313580 (1967-11-01), Jelatis et al.
patent: 3582089 (1971-06-01), Amorese

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