Patent US4132421A successfully refreshed from Google Patents.
US4132421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Federal Mogul World Wide LLC
•
Filing: 1977-08-05
•
Granted: 1979-01-02
•
Expires: 1997-08-05
Abstract
Abstract An improved metal encased radial-type oil shaft seal of either single or dual lip construction wherein the primary seal lip is polytetrafluoroethylene -- or the like and is bonded and mechanically interlocked to the metal case by an elastomeric material.
Inventors
- 👤 George L. Corsi
- 👤 Stanley N. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:51
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/328; F16J15/3284; Y; Y10; Y10S; Y10S277/00; Y10S277/924
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
An oil seal adapted to be press fitted into a bore of a housing member through which a rotating shaft extends and wherein the seal is to be mounted on such shaft in interference fit therewith so as to exclude the passage of oil along the shaft comprising, a relatively rigid metal case means, a wafer-like seal element including an annular frustoconically shaped portion defining a seal lip at one end adapted for interference fit with a shaft, said wafer-like seal element being of uniform cross-sectional thickness and being of a non-elastomeric material other than metal and heatably unbondable thereto, a flange portion of said seal element being in juxtaposition with said case means, elastomeric bonding means for securing said seal element to the case means, said bonding means including a main body portion opposite the flange portion of said seal element from the case means, said flange portion of said seal element including a plurality of passages in and circumferentially spaced about the flange portion, and said elastomeric bonding means further including secondary portions extending from the main body portion and through each of said plurality of passages and being bonded to the case means whereby said seal element is fixed in place relative to the case means and is prevented from rotating relative thereto.
Claim 2
Dependent Claim
216 words
An oil seal adapted to be press fitted into a bore of a housing member through which a rotating shaft extends and wherein the seal is to be mounted on such shaft in interference fit therewith so as to exclude the passage of oil along the shaft comprising, a relatively rigid metal case means, a wafer-like seal element including an annular frustoconically shaped portion defining a seal lip at one end adapted for interference fit with a shaft, said wafer-like seal element being of uniform cross-sectional thickness and being of a non-elastomeric material other than metal and heatably unbondable thereto, a flange portion of said seal element being in juxtaposition with said case means, elastomeric bonding means for securing said seal element to the case means, said bonding means including a main body portion opposite the flange portion of said seal element from the case means, said flange portion of said seal element including a plurality of passages in and circumferentially spaced about the flange portion, and said elastomeric bonding means further including secondary portions extending from the main body portion and through each of said plurality of passages and being bonded to the case means whereby said seal element is fixed in place relative to the case means and is prevented from rotating relative thereto.
Claim 3
Dependent Claim
79 words
An oil seal as defined in claim 1, wherein: said case means includes an outer cylindrical portion and a radial flange depending from one end thereof, said radial flange being of stepped configuration and including a lower radial portion, an intermediate cylindrical portion, and an upper radial portion, said lower radial portion and said intermediate cylindrical portion defining a counterbore, and said flange portion of wafer like seal element and said elastomeric bonding means being located within said counterbore.
Claim 4
Dependent Claim
28 words
An oil seal as defined in claim 1 further including a second seal lip means, said second seal lip means being of elastomeric material and of annular shape.
Claim 5
Dependent Claim
47 words
The oil seal of claim 3 wherein said second seal lip is integral with said elastomeric bonding element means, and is of frustoconical shape with the radially inwardmost end of said second seal lip means being directed in a direction axially opposite that of said seal element.
Claim 6
Dependent Claim
15 words
The oil seal as defined in either claim 1 wherein said seal element is polytetrafluoroethylene.
References Cited (Backward Citations)
US2157995A
Cited
US2183004A
Cited
US2264413A
Cited
US2819106A
Cited
DE1213182B
Cited
US3549445A
Cited
US3521890A
Cited
US3924861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |