US3934946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating ball slide
Assignee: Motion Systems Inc
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Filing: 1973-10-05
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Granted: 1976-01-27
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Expires: 1993-10-05
Abstract
Abstract A recirculating ball slide for supporting heavy loads. The slide includes an oval ball race having a special concave ball track. The balls are retained in the race by means of a housing having a cut-away lower portion to expose the balls for mating engagement with a slide rail which also has a concave ball track.
Inventors
- 👤 John Kelsey Burr
- 👤 William Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/0614; F16C29/0621; F16C29/0623; F16C2240/00; F16C2240/40; F16C2240/70; F16C2240/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
In combination, a ball slide and a slide rail, said ball slide comprising: a recirculating ball race; a plurality of ball bearings; and means for retaining said ball bearings within said ball race, said ball slide and slide rail both including a concave ball track, at least the ball track in said ball race having an average radius of curvature less than 10 percent larger than the radius of said ball bearings, the center of curvature thereof being radially offset from the center of said ball bearings, said ball slide and said slide rail being respectively secured to first and second members which are adapted for relative movement with respect to one another, said slide rail and/or said ball slide being secured to their respective members by means of rotatable, eccentric machine screws.
Claim 2
Dependent Claim
133 words
In combination, a ball slide and a slide rail, said ball slide comprising: a recirculating ball race; a plurality of ball bearings; and means for retaining said ball bearings within said ball race, said ball slide and slide rail both including a concave ball track, at least the ball track in said ball race having an average radius of curvature less than 10 percent larger than the radius of said ball bearings, the center of curvature thereof being radially offset from the center of said ball bearings, said ball slide and said slide rail being respectively secured to first and second members which are adapted for relative movement with respect to one another, said slide rail and/or said ball slide being secured to their respective members by means of rotatable, eccentric machine screws.
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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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |