US4062602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball bushing
Assignee: SKF Nova AB
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Filing: 1976-11-05
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Granted: 1977-12-13
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Expires: 1996-11-05
Abstract
Abstract A ball bushing comprising a sleeve, a cage, inside the sleeve adapted to be mounted on a shaft member or the like. The ball bushing has formed therein a number of closed ball paths, the balls being loaded between the sleeve and the shaft in a section or zone of each ball path. The sleeve has a number of longitudinal profiles countersunk in relation to a circle circumscribing the sleeve. The profiles define internal raceways for the loaded balls. The sleeve is also characterized by a generally uniform or constant cross sectional shape along its entire length.
Inventors
- 👤 Sven Walter Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:11
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/068; F16C29/0683; F16C29/0685; F16C29/0688; F16C29/008
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
85 words
A ball bushing comprising a sleeve, a cage and a number of closed ball paths with balls guided by the cage, the balls being loaded between the sleeve and a shaft surrounded by the sleeve in a section of each ball path, characterized by that the sleeve has a mainly constant sectional shape along its whole length and has a number of longitudinal profiles which are countersunk in relation to a circle circumscribing the sleeve, the profiles comprising internal raceways (6,13) for the loaded balls.
Claim 2
Dependent Claim
85 words
A ball bushing comprising a sleeve, a cage and a number of closed ball paths with balls guided by the cage, the balls being loaded between the sleeve and a shaft surrounded by the sleeve in a section of each ball path, characterized by that the sleeve has a mainly constant sectional shape along its whole length and has a number of longitudinal profiles which are countersunk in relation to a circle circumscribing the sleeve, the profiles comprising internal raceways (6,13) for the loaded balls.
Claim 3
Dependent Claim
50 words
A ball bushing according to claim 1, characterized by that the curved portions of the ball paths on each side of the loaded portions of the ball paths are surrounded by members (7,8) which are separate in relation to the sleeve and are provided on either side of said sleeve.
Claim 4
Dependent Claim
28 words
A ball bushing according to claim 1, characterized by that the sleeve is made of a profiled tube with a mainly constant wall thickness around the whole circumference.
Claim 5
Dependent Claim
41 words
A ball bushing according to claim 1, characterized by that the cross section circumference of the sleeve (12) has a generally circular shape and that the sleeve has a number of longitudinal corrugations, which constitute raceways (13) for the loaded balls.
Claim 6
Dependent Claim
45 words
A ball bushing according to claim 1, characterized by that the sleeve has a mainly polygonal profile, in while the loaded portions of the ball paths are situated about halfway between each corner (11) and an unloaded return portion (5) is situated at each corner.
Claim 7
Dependent Claim
40 words
A ball bushing according to claim 5, characterized by that the polygonal profile of the sleeve is modified so that the portions between each corner are outwardly convex or describe an angle with the point directed outwardly in unloaded state.
Claim 8
Dependent Claim
40 words
A ball bushing according to claim 5, characterized by that the polygonal profile of the sleeve is modified so that the portions between each corner are inwardly convex or describe an angle with the point directed inwardly in unloaded state.
Claim 9
Dependent Claim
90 words
A ball bushing comprising a cage having an inner bore to receive a shaft member of the like, an elongated sleeve circumscribing the cage and means defining a number of closed ball paths in the sleeve and cage including a series of axially extending circumferentially spaced grooves in the cage wherein the balls are loaded between the sleeve and shaft, said sleeve having a plurality of longitudinally extending, circumferentially spaced rim portions and longitudinal profiles between said rim portions spaced radially inwardly of a circular trace through said rim portions.
Claim 10
Dependent Claim
90 words
A ball bushing comprising a cage having an inner bore to receive a shaft member of the like, an elongated sleeve circumscribing the cage and means defining a number of closed ball paths in the sleeve and cage including a series of axially extending circumferentially spaced grooves in the cage wherein the balls are loaded between the sleeve and shaft, said sleeve having a plurality of longitudinally extending, circumferentially spaced rim portions and longitudinal profiles between said rim portions spaced radially inwardly of a circular trace through said rim portions.
Claim 11
Dependent Claim
21 words
A ball bushing as claimed in claim 8 wherein said sleeve is of generally uniform cross section for its entire length.
Claim 12
Dependent Claim
14 words
A ball bushing as claimed in claim 8 wherein said internal raceway is concave.
Claim 13
Dependent Claim
32 words
A ball bushing as claimed in claim 8 wherein the inner surface of each of said rim portions defines a raceway for the balls in the unloaded portion of the ball path.
Claim 14
Dependent Claim
47 words
A ball bushing as claimed in claim 8 wherein the sleeve is of polygonal cross section and the number of corners thereof defining the rim portions corresponds to the number of closed ball paths and the return portions of the ball paths are disposed at said corners.
Claim 15
Dependent Claim
35 words
A ball bushing as claimed in claim 8 adapted to be mounted in the cylindrical seat of a housing and wherein said rim portions are of an arcuate outer contour conforming to the cylindrical seat.
Claim 16
Dependent Claim
17 words
A ball bushing as claimed in claim 8 wherein said rim portions are of barrel-shaped cross section.
Claim 17
Dependent Claim
16 words
A ball bushing as claimed in claim 8 wherein said sleeve is of constant wall thickness.
Claim 18
Dependent Claim
28 words
A ball bushing as claimed in claim 8 wherein the wall thickness of said sleeve at the profiles is greater than said rim portion to provide increased rigidity.
Claim 19
Dependent Claim
38 words
A ball bushing as claimed in claim 8 including a housing having a cylindrical seat for mounting the ball bushing therein and a member made of an elastic material disposed between each of said profiles and said seat.
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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |