Patent US4411478A successfully refreshed from Google Patents.
US4411478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling bearing for lengthwise guiding of a shaft or the like
Assignee: SKF GmbH
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Filing: 1981-11-02
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Granted: 1983-10-25
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Expires: 2001-11-02
Abstract
Abstract A rolling bearing for lengthwise movement along a shaft comprised of an outer sleeve having a plurality of races therein for rolling bearings, a cage being provided to guide the rolling bearings. A sealing ring is provided at each end of the assembly, the sealing ring having lips extending radially inwardly to contact the shaft. The sealing lips are thin and elastically bendable, and are mounted to enable bowing thereof into free spaces on opposite sides thereof, depending upon direction of lengthwise movement of the shaft. As a consequence, for small movements of the shaft, the sealing lips cling to the shaft and become bulged, rather than sliding along the shaft.
Inventors
- 👤 Armin Olschewski
- 👤 Manfred Brandenstein
- 👤 Lothar Walter
- 👤 Horst M. Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:01
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/068; F16C29/0683; F16C29/0685; F16C29/0688; F16C29/08; F16C29/084
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
In a rolling bearing for lengthwise movement along a shaft, comprised of an outer sleeve, axially extending races in the bore of the outer sleeve for loaded rolling bodies and return races for unloaded rolling bodies, with at least one endless row of rolling bodies positioned in said races, and a sealing ring mounted on each end of said outer sleeve, the bore surface of the outer sleeve adapted to slide on said shaft; the improvement wherein each said sealing ring has a thin elastically bendable radially inwardly directed sealing lip, the inner diameter of the bore of said sealing lips, when the shaft is not assembled in said rolling bearing, being less than the diameter of said shaft, said bearing having limiting walls defining free spaces on both the axially opposite sides of each sealing lip for limiting the movement, of said lips whereby said sealing lips may be selectively bulged in opposite axial directions into said spaces upon lengthwise movement of the shaft in opposite directions, when the shaft is assembled in the bore of said rolling bearing.
Claim 2
Dependent Claim
180 words
In a rolling bearing for lengthwise movement along a shaft, comprised of an outer sleeve, axially extending races in the bore of the outer sleeve for loaded rolling bodies and return races for unloaded rolling bodies, with at least one endless row of rolling bodies positioned in said races, and a sealing ring mounted on each end of said outer sleeve, the bore surface of the outer sleeve adapted to slide on said shaft; the improvement wherein each said sealing ring has a thin elastically bendable radially inwardly directed sealing lip, the inner diameter of the bore of said sealing lips, when the shaft is not assembled in said rolling bearing, being less than the diameter of said shaft, said bearing having limiting walls defining free spaces on both the axially opposite sides of each sealing lip for limiting the movement, of said lips whereby said sealing lips may be selectively bulged in opposite axial directions into said spaces upon lengthwise movement of the shaft in opposite directions, when the shaft is assembled in the bore of said rolling bearing.
Claim 3
Dependent Claim
46 words
The rolling bearing of claim 1 further comprising a cage mounted within said outer sleeve and having guide channels for guiding the rolling bodies, and an end ring affixed to each end of said outer sleeve and covering the corresponding axially facing sides of said cage.
Claim 4
Dependent Claim
33 words
The rolling bearing of claim 2 wherein said sealing rings are clamped between the axial ends of said cage and the respective end rings, said sealing rings being of an elastic compressible material.
Claim 5
Dependent Claim
13 words
The rolling bearing of claim 1 wherein said sealing rings are disc shaped.
Claim 6
Dependent Claim
15 words
The rolling bearing of claim 1 further comprising ventilation openings extending through said sealing lips.
Claim 7
Dependent Claim
56 words
The rolling bearing of claim 1 wherein each of said sealing rings has a second thin elastically bendable radially inwardly directing sealing lip with an inner diameter substantially equal to that of the first mentioned sealing lip, said second sealing lips being axially spaced from the first mentioned sealing lips, to form a free space therebetween.
Claim 8
Dependent Claim
18 words
The rolling bearing of claim 6 wherein each of said sealing lips has a ventilation hole extending therethrough.
Claim 9
Dependent Claim
37 words
The rolling bearing of claim 7 further comprising inclined surfaces defining said free spaces at opposite sides of said sealing lips, whereby said ventilation holes are selectively sealed upon different direction of lengthwise movement of said shaft.
References Cited (Backward Citations)
US2719768A
Cited
US3353875A
Cited
US3692272A
Cited
US4123121A
Cited
US4227751A
Cited
US4328999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |