Patent US3659909A successfully refreshed from Google Patents.
US3659909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing constructions
Assignee: Individual
•
Filing: 1970-10-26
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Granted: 1972-05-02
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Expires: 1990-10-26
Abstract
Abstract An anti friction bearing construction comprising a sleeve in which is telescoped a flat sided polygonal cross-section shaft; with longitudinally spaced rollers frictionlessly mounted in the sleeve and engaging the flat sides of the shaft.
Inventors
- 👤 James Egbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:02
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
In combination, an elongated flat and smooth sided square cross-section shaft, and a linear bearing for said shaft; said bearing comprising a hollow round straight sided cylindrical unitary sleeve; longitudinally spaced, transversely extending, elongated, small diameter, straight sided needles traversing the interior of the sleeve and traversing and engaging the flat smooth sides of the shaft to provide needle bearings for the shaft at longitudinally spaced points; there being at least four such needles, arranged in at least two separate and different transverse planes; two to a plane; and with the ends of each of the needLes being within and surrounded by and journalled in two larger diameter frictionless bearings, these being mounted in sockets of the sleeve; with the needles being of a length to a diameter ratio of at least about 6 to 1, whereby the ratio of cross sectional area of the shaft to the cross sectional area of the sleeve is at a maximum.
Claim 2
Dependent Claim
158 words
In combination, an elongated flat and smooth sided square cross-section shaft, and a linear bearing for said shaft; said bearing comprising a hollow round straight sided cylindrical unitary sleeve; longitudinally spaced, transversely extending, elongated, small diameter, straight sided needles traversing the interior of the sleeve and traversing and engaging the flat smooth sides of the shaft to provide needle bearings for the shaft at longitudinally spaced points; there being at least four such needles, arranged in at least two separate and different transverse planes; two to a plane; and with the ends of each of the needLes being within and surrounded by and journalled in two larger diameter frictionless bearings, these being mounted in sockets of the sleeve; with the needles being of a length to a diameter ratio of at least about 6 to 1, whereby the ratio of cross sectional area of the shaft to the cross sectional area of the sleeve is at a maximum.
References Cited (Backward Citations)
CA636315A
Cited
US1841032A
Cited
US2144156A
Cited
US2638387A
Cited
US3059979A
Cited
US3353875A
Cited
US3407011A
Cited
US3433033A
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |