Linear actuator
Abstract
Abstract A DEVICE FOR CONVERTING ROTARY MOTION TO LINEAR MOTION IN WHICH A SHAFT MEMBER AND A TUBULAR MEMBER ARE MOUNTED IN CONCENTRIC TELESCOPING RELATION, AND A BEARING UNIT IN THE FORM OF A PLURALITY OF BEARING BALLS ROLLING ON THE TUBULAR MEMBER AND MOUNTED IN A SPECIAL CAGE OR RETAINER IS INTERPOSED BETWEEN THE SHAFT MEMBER AND THE TUBULAR MEMBER, AND A WEDGE LOCK IS ESTABLISHED BETWEEN THE SHAFT MEMBER AND THE BEARING BALLS THAT WEDGE LOCKS THE BALLS BETWEEN THE TWO MEMBERS. THE BEARING UNIT IS MOUNTED IN A FIXED PLANE DISPOSED TRANSVERSELY OF THE DEVICE SHAFT AND TUBULAR MEMBER, AND THE BALLS ARE SPACED EQUIDISTANTLY ABOUT THE AXES OF SAID MEMBERS AND ROTATE ABOUT INDIVIDUAL AXES THAT ARE CANTED AT AN ACUTE ANGLE ON THE ORDER OF TWO DEGREES OUT OF PARALLELISM WITH THE LONGITUDINAL AXES OF SAID MEMBERS.
Inventors
- 👤 Richard B Stanley
Bibliographic Details
Claims Analysis
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |