Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1986-08-26
1987-06-02
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 12, 277 30, 277152, 277 1, 464133, F16J 1532, F16D 384
Patent
active
046697373
ABSTRACT:
An annular shaft seal to be moved over a first, larger diameter portion of a shaft and to seal against a second, smaller, diameter portion of the shaft. The shaft seal comprises a mounting portion, a sealing lip portion and a flexible channel-shaped portion interconnecting the mounting portion and the sealing lip portion. The sealing lip portion has a primary sealing lip and a secondary sealing lip disposed adjacent to and spaced axially from the primary sealing lip in a direction away from the mounting portion. The sealing lip portion is movable with respect to the mounting portion from the sealing profile in which the primary sealing lip has a smaller diameter than the secondary sealing lip and is adapted to be in sealing contact with the second portion of the shaft, to a non-sealing profile in which the diameter of the primary sealing lip is larger than that of the secondary sealing lip, and in which the secondary sealing lip engages the larger diameter portion of the shaft thereby distending the primary sealing lip to its larger diameter condition such that the primary sealing lip cannot contact either portion of the shaft when the seal is being installed on the shaft. The primary sealing lip is maintained out of contact with the first portion of the shaft during installation and after installation the sealing lip portion without reversal thereof automatically returns from non-sealing profile back to sealing profile whereby the primary sealing lip automatically moves into sealing contact with the second portion of the shaft after the secondary sealing lip has been moved over and beyond the first portion of the shaft to engage the second portion of the shaft.
REFERENCES:
patent: 2181203 (1939-11-01), Reynolds
patent: 3235271 (1966-02-01), Johnson et al.
patent: 3346265 (1967-10-01), Rhoads et al.
patent: 3545770 (1970-12-01), Wheelock
patent: 3591963 (1971-07-01), Kopp
patent: 3813104 (1974-05-01), Smith
patent: 3825271 (1974-07-01), Bellastio
patent: 3940948 (1976-03-01), Schultenkamper
patent: 3947944 (1976-04-01), Washington
patent: 4114897 (1978-09-01), Bainard
patent: 4126317 (1978-11-01), Bainard
patent: 4131286 (1978-12-01), Bainard
patent: 4215869 (1980-08-01), Pendleton
Neapco Inc.
Ward Robert S.
LandOfFree
Annular shaft seal with cam portion on sealing lip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Annular shaft seal with cam portion on sealing lip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Annular shaft seal with cam portion on sealing lip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-607948