Pressure sensitive shaft sealing ring

Details Pressure sensitive shaft sealing ring Pressure sensitive shaft sealing ring

1988-09-21

1989-07-04

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277134, 277153, F16J 1544

Patent

active

048444804

ABSTRACT:
A radial shaft sealing ring includes an outer fastening ring reinforced by an insert for fixing the sealing ring in the bore of a casing through which a rotating shaft passes. The sealing ring includes a sealing lip directed toward the inside of the casing and biased by a spring against the outer surface of the shaft. A dust protection lip, directed angularly toward the outside of the casing, includes an arcuate cut through its thickness defining a deflectable tab, which opens by bending through the thickness of the lip within the space extending between the dust protecting lip and the sealing lip when pressure within the space rises.

REFERENCES:
patent: 2743950 (1956-05-01), Helfrect
patent: 3472519 (1969-10-01), Gehret
patent: 3606352 (1971-09-01), Lutz
patent: 3685838 (1972-08-01), Malmstrom
patent: 3785660 (1974-11-01), Bush
patent: 4433846 (1984-02-01), Romero et al.
patent: 4522411 (1985-06-01), Burgan
patent: 4613143 (1986-09-01), Butler
patent: 4616836 (1986-10-01), Drygalski et al.

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