Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1976-02-27
1976-10-26
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 65, 277 83, F16J 1534
Patent
active
039880265
ABSTRACT:
The present invention relates to a self-compensating rotary seal member such as is used in low pressure applications, i.e. where a drive shaft extends through a container wall. The seal member is characterized by an elastomeric collar member mounted on the drive shaft within a housing, the ends of the collar being in frictional driving connection with a spaced pair of thrust washers, the washers in turn being yieldingly pressed against wear plates formed of material having a low coefficient of friction. Sealing is effected in a direction axially of the shaft by the interfit of the collar about the shaft, and in the direction normal to the axis by the frictional and rotary engagement of the thrust washers against portions of the wear plate or plates surrounding the shaft and disposed at the ends of the housing. Since the seal, in a radial direction, is effected between surfaces aligned normal to the direction of rotation of the shaft, substantial degrees of eccentricity can be accommodated, as can a degree of tilting of the shaft relative to the housing.
REFERENCES:
patent: 2189686 (1940-02-01), Stevenson
patent: 2367403 (1945-01-01), Kosatka
patent: 2561694 (1951-07-01), Gilbert
patent: 2586739 (1952-02-01), Summers
patent: 2853020 (1958-09-01), Hollinger et al.
patent: 3015505 (1962-01-01), Smith
patent: 3268232 (1966-08-01), Richards
patent: 3442516 (1969-05-01), Voitik
Basseches Mark T.
Basseches Paula T.
Smith Robert I.
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