US4522410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axle or shaft seal with overlapping ring extension members
Assignee: Carl Freudenberg KG
•
Filing: 1984-09-25
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Granted: 1985-06-11
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Expires: 2004-09-25
Abstract
Abstract An axle or shaft seal has inner and outer sealing rings for respective fixed connection to the axle or shaft and a structure thereabout with respect to which the axle or shaft is relatively rotatable axially. Each of the inner and outer rings has a pair of members associated therewith, at least one sealingly, and extending generally toward the other ring. The members associated with one ring are relatively movable and axially between the members associated with the other ring against which they are urged sealingly by a resilient element therebetween.
Inventors
- 👤 Helmut Holzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
131 words
A seal for sealing about an axle or shaft rotatable axially relative to a structure thereabout, comprising: inner and outer sealing rings for respective, fixed connection to the axle or shaft and structure thereabout, each ring having a pair of members associated therewith, at least one sealingly, and extending generally toward the other ring, the members associated with one ring being axially between the members associated with the other ring; and a resilient element between the members associated with the one ring for urging the members associated with the one ring axially of the axle or shaft into sealing engagement with the members associated with the other ring, whereby to maintain uniform sealing engagement force between the members irrespective of relative axial displacement between the axle or shaft and structure thereabout.
Claim 2
Dependent Claim
131 words
A seal for sealing about an axle or shaft rotatable axially relative to a structure thereabout, comprising: inner and outer sealing rings for respective, fixed connection to the axle or shaft and structure thereabout, each ring having a pair of members associated therewith, at least one sealingly, and extending generally toward the other ring, the members associated with one ring being axially between the members associated with the other ring; and a resilient element between the members associated with the one ring for urging the members associated with the one ring axially of the axle or shaft into sealing engagement with the members associated with the other ring, whereby to maintain uniform sealing engagement force between the members irrespective of relative axial displacement between the axle or shaft and structure thereabout.
Claim 3
Dependent Claim
33 words
The seal of claim 1, wherein the facing surfaces of the members associated with the one ring converge towards each other and the resilient element comprises a garter or garter-like ring engaging therebetween.
Claim 4
Dependent Claim
14 words
The seal of claim 2, wherein the resilient element comprises a rubber-elastic O ring.
Claim 5
Dependent Claim
18 words
The seal of claim 3, wherein the resilient element bears on the structure about the axle or shaft.
Claim 6
Dependent Claim
33 words
The seal of claim 1, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring are concave.
Claim 7
Dependent Claim
33 words
The seal of claim 2, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring are concave.
Claim 8
Dependent Claim
33 words
The seal of claim 3, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring are concave.
Claim 9
Dependent Claim
32 words
The seal of claim 1, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring converge.
Claim 10
Dependent Claim
32 words
The seal of claim 2, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring converge.
Claim 11
Dependent Claim
32 words
The seal of claim 4, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring converge.
Claim 12
Dependent Claim
32 words
The seal of claim 5, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring converge.
Claim 13
Dependent Claim
32 words
The seal of claim 7, wherein the surfaces of the members associated with the one ring which are urged axially into sealing engagement with the members associated with the other ring converge.
Claim 14
Dependent Claim
19 words
The seal of claim 1, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 15
Dependent Claim
19 words
The seal of claim 2, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 16
Dependent Claim
19 words
The seal of claim 4, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 17
Dependent Claim
19 words
The seal of claim 5, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 18
Dependent Claim
19 words
The seal of claim 7, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 19
Dependent Claim
19 words
The seal of claim 12, wherein the members associated with one of the rings additionally comprise hydrodynamically-acting back-feed members.
Claim 20
Dependent Claim
22 words
The seal of claim 13, wherein the hydrodynamically-acting back-feed members comprise paddles circumferentially spaced about the members associated with the other ring.
Claim 21
Dependent Claim
22 words
The seal of claim 18, wherein the hydrodynamically-acting back-feed members comprise paddles circumferentially spaced about the members associated with the other ring.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |