US4240643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular seal
Assignee: Carl Freudenberg KG
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Filing: 1978-08-31
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Granted: 1980-12-23
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Expires: 1998-08-31
Abstract
Abstract An annular seal for a shaft comprising an annular elastomeric lip 2 having an annular rim 2.1, and an annular reinforcing member 1 provided with a groove into which rim 2.1 fits. The portion of the member 1 spaced from the groove is compressible and in unassembled state is larger than in assembled state, the compression serving to lock the seal together. Multiple lips and/or grooves may be provided.
Inventors
- 👤 Bernd Becker
- 👤 Hans Forch
- 👤 Adam Helfrich
- 👤 Gottfried Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:06
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3248; Y; Y10; Y10S; Y10S277/00; Y10S277/925
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
An annular seal comprising an annular elastomeric lip member having at least one annular rim and an annular reinforcing member for said lip member, said reinforcing member having an end face provided with a groove in which said rim is held, at least the portion of the reinforcing member that is spaced from the groove being of flexible compressible construction and being of a diameter adjacent the groove which in uncompressed state is greater than the diameter when installed in operative position, the portion of the reinforcing member lying outside of the groove being provided with a plurality of slits dividing that portion into a plurality of segments uniformly distributed about the circumference.
Claim 2
Dependent Claim
113 words
An annular seal comprising an annular elastomeric lip member having at least one annular rim and an annular reinforcing member for said lip member, said reinforcing member having an end face provided with a groove in which said rim is held, at least the portion of the reinforcing member that is spaced from the groove being of flexible compressible construction and being of a diameter adjacent the groove which in uncompressed state is greater than the diameter when installed in operative position, the portion of the reinforcing member lying outside of the groove being provided with a plurality of slits dividing that portion into a plurality of segments uniformly distributed about the circumference.
Claim 3
Dependent Claim
33 words
An annular seal according to claim 1, wherein the lip member is joined to the reinforcing member by at least two rims axially spaced from and facing one another in a pincer-like manner.
Claim 4
Dependent Claim
27 words
An annular seal according to claim 1, wherein the lip member is joined to the reinforcing member by at least two rims disposed radially above one another.
Claim 5
Dependent Claim
17 words
An annular seal according to claim 1, wherein the rim has a projecting part of bulbous cross-section.
Claim 6
Dependent Claim
21 words
An annular seal according to claim 1, wherein the reinforcing member is formed of a thermoplastic, thermosetting plastic or elastomeric material.
Claim 7
Dependent Claim
27 words
An annular seal according to claim 1, wherein the reinforcing member in its outside diameter has an enlarged portion beveled at a shallow angle in both direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |