Patent US3559500A successfully refreshed from Google Patents.
US3559500A
Expired / Lapsed
US
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Ball screw shaft
Assignee: Thomson Saginaw Ball Screw Co LLC
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Filing: 1969-10-16
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Granted: 1971-02-02
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Expires: 1989-10-16
Abstract
Abstract A LONG BALL SCREW SHAFT UNIT IS FABRICATED OF A PLURALITY OF SHAFT SECTIONS IN WHICH EACH OF THE JOINS BETWEEN ADJACENT SECTINS IS COMPRESSION LOADED DURING ASSEMBLY THROUGH USE OF A THERMAL CONTRACTION PROCESS. THE STARTS OF THE BALL SCREW GROOVE ON ADJACENT SHAFT SECTIONS ARE ENSURED OF ALIGNMENT FOR GROOVE CONTINUITY THROUGHOUT THE UNIT UPON COMPLETION OF THE CONSTRUCTION PROCESS THROUGH USE OF INTERNAL TENSION MEMBERS, EACH CONNECTED BETWEEN ADJACENT SECTIONS BY MEANS OF THREADS ON OPPOSITE ENDS OF THE TENSION MEMBER FORMED WITH DIFFERING PITCH.
Inventors
- 👤 David A Galonska
- 👤 Dan R Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:08
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F16H25/22; F16H25/2204; F16H25/2209; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |