Self-venting seal

Details Self-venting seal Self-venting seal

1982-03-16

1984-05-15

Levy, Stuart S.

Cutlery

277 29, 277 50, 277152, F16C 3376

Patent

active

044484615

ABSTRACT:
A seal for closing a bearing cavity that has a bore and a wear surface at its end includes an elastomeric retaining band that fits snugly against the wall of the bore, an elastomeric seal lip that contacts the wear surface and creates a barrier to the passage of fluid along that surface as the surface rotates relative to the seal or vice-versa, and an impervious connecting section that extends between the retaining band and the seal lip. The retaining band contains several axially directed channels that communicate with the bearing cavity and are normally closed and isolated from the ambient atmosphere by flaps which are formed integral with the band and are highly flexible. As a consequence, the flaps will flex when subjected to a slight increase in pressure within the bearing cavity so as to expose the channels to the ambient atmosphere and thereby vent the bearing cavity.

REFERENCES:
patent: 2830832 (1958-04-01), Moorman et al.
patent: 3314735 (1967-04-01), Kocian
patent: 3748003 (1973-07-01), Barber
patent: 3858950 (1975-01-01), Otto
patent: 4043620 (1977-08-01), Otto
patent: 4106781 (1978-08-01), Benjamin et al.
patent: 4337956 (1982-07-01), Hopper
patent: 4344631 (1982-08-01), Winn

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