US4688950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller bearing for linear movement
Assignee: Nippon Thompson Co Ltd
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Filing: 1984-06-26
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Granted: 1987-08-25
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Expires: 2004-06-26
Abstract
Abstract A linear motion roller bearing for allowing an object such as a slider to move along a straight line defined, for example, by a track rail includes an endless path and a plurality of rollers having substantially the same size in diameter and height, which are arranged in contact in the endless path with their axes of rotation directed as rotated over 90 DEG alternately with respect to the longitudinal axis of the endless path. The endless path includes a pair of straight portions and a pair of semicircularly curved portions each of which connects the corresponding ends of the pair of straight portions. Each of the curved portions is so structured that the maximum number of rollers which can be present therein ranges between (even number +0.1) and (even number +0.5) if the pair of straight portions are not provided on the same horizontal plane and between (integer +0.1) and (integer +0.5) if the pair of straight portions are provided on the same horizontal plane or a plane close thereto.
Inventors
- 👤 Yasunori Yokota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:12
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/0633; F16C29/0635; F16C29/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A linear roller bearing including an endless path and a plurality of rollers having substantially the same size in diameter and height arranged in said endless path in contact between adjacent ones of said rollers having their axes of rotation rotated over 90° alternately with respect to the longitudinal axis of said endless path, said endless path comprising a pair of straight portions which are spaced apart from and in parallel with each other and a pair of curved portions each connecting the corresponding ends of said pair of straight portions, each of said curved portions being so structured that the maximum number of said rollers which can be present in each curved portion ranges between an even number of rollers plus 0.1 to 0.5 of an additional roller if said pair of straight portions are not provided in the same horizontal plane.
Claim 2
Dependent Claim
143 words
A linear roller bearing including an endless path and a plurality of rollers having substantially the same size in diameter and height arranged in said endless path in contact between adjacent ones of said rollers having their axes of rotation rotated over 90° alternately with respect to the longitudinal axis of said endless path, said endless path comprising a pair of straight portions which are spaced apart from and in parallel with each other and a pair of curved portions each connecting the corresponding ends of said pair of straight portions, each of said curved portions being so structured that the maximum number of said rollers which can be present in each curved portion ranges between an even number of rollers plus 0.1 to 0.5 of an additional roller if said pair of straight portions are not provided in the same horizontal plane.
Claim 3
Dependent Claim
22 words
A linear motion roller bearing as defined in claim 1 wherein each of said pair of curved portions has a semicircular shape.
Claim 4
Dependent Claim
56 words
A linear motion roller bearing as defined in claim 1 wherein each of said pair of straight portions has a length ranging between a diameter of said rollers multiplied by an even number plus 0.2 of an additional roller and a diameter of said rollers multiplied by an odd number plus 0.2 of an additional roller.
Claim 5
Dependent Claim
147 words
A linear motion roller bearing including an endless path and a plurality of rollers having substantially the same size diameter and height arranged in said endless path in contact between adjacent ones of said rollers and having their axes of rotation rotated over 90° alternately with respect to the longitudinal axis of said endless path, said endless path comprising a pair of straight portions which are spaced apart from each other and in parallel and a pair of curved portions each connecting the corresponding end of said pair of straight portions, each of said curved portions being so structured that the maximum number of said rollers which can be present in each curved portion ranges between an integer number of rollers plus 0.1 of an additional roller if said pair of straight portions are provided in the same horizontal plane or in a plane substantially close thereto.
Claim 6
Dependent Claim
147 words
A linear motion roller bearing including an endless path and a plurality of rollers having substantially the same size diameter and height arranged in said endless path in contact between adjacent ones of said rollers and having their axes of rotation rotated over 90° alternately with respect to the longitudinal axis of said endless path, said endless path comprising a pair of straight portions which are spaced apart from each other and in parallel and a pair of curved portions each connecting the corresponding end of said pair of straight portions, each of said curved portions being so structured that the maximum number of said rollers which can be present in each curved portion ranges between an integer number of rollers plus 0.1 of an additional roller if said pair of straight portions are provided in the same horizontal plane or in a plane substantially close thereto.
Claim 7
Dependent Claim
22 words
A linear motion roller bearing as defined in claim 4 wherein each of said pair of curved portions has a semiircular shape.
Claim 8
Dependent Claim
48 words
A linear motion roller bearing as defined in claim 4 wherein each of said pair of straight portions has a length ranging between a diameter of said rollers multiplied by an integer and a diameter of said rollers multiplied by an integer plus 0.4 of an additional roller.
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) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |