Labyrinth type rotary seal with intermittent feature of contact

Details Labyrinth type rotary seal with intermittent feature of contact Labyrinth type rotary seal with intermittent feature of contact

1977-04-25

1979-02-13

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 82, 277 88, 3081872, F16J 1532, F16C 124, F16C 3380

Patent

active

041392035

ABSTRACT:
The invention is an improved rotary seal which is particularly well suited for protecting the bearing area in a conveyor idler roll. The seal has inner and outer annular members which normally rotate freely without contact relative to each other. The members have cooperative means to form a labyrinth effective to restrict the ingress of contaminant or the egress of lubricant to or from the bearing area. One of the members further includes an attached annular disc of resilient flexible material. When the lubricant pressure in the bearing area increases, such as when the bearing is being regreased, it forces the free edge of the disc into contact with the other member to form a barrier against the leakage of lubrication. When the lubricant pressure normalizes, the resilient disc recovers to its normal, noncontact position.

REFERENCES:
patent: 2132838 (1938-10-01), Weckstein
patent: 2641515 (1953-06-01), Bankauf et al.
patent: 2945730 (1960-07-01), Murray et al.
patent: 3350148 (1967-10-01), Sanguinetti et al.
patent: 3552809 (1971-01-01), Owens
patent: 3639016 (1972-02-01), Bourgeois
patent: 3858950 (1975-01-01), Otto

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