US3587683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic screwdriver
Assignee: Ingersoll Rand Co
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Filing: 1969-02-07
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Granted: 1971-06-28
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Expires: 1989-02-07
Abstract
Abstract AN AUTOMATIC SCREWDRIVER HAVING A HEAD WITH A MOVABLE SECTION WHICH IS NORMALLY RETRACTED SO THAT THE SCREWDRIVER BLADE IS RESILIENTLY URGED AGAINST A SCREW LOCATED IN THE SCREWDRIVER AND HAVING MEANS FOR MOVING THE MOVABLE SECTION FORWARD TO ALLOW THE FEEDING OF A SCREW INTO THE HEAD AND THEREAFTER RETRACTING THE MOVABLE SECTION. URGING THE SCREWDRIVER BLADE RESILIENTLY AGAINST THE HEAD OF THE SCREW PREVENTS THE SCREW FROM BACKING UP IN THE HEAD WHEN IT IS APPLIED TO A WORKPIECE. PNEUMATIC PRESSURE IS USED TO MOVE THE MOVABLE SECTION OF THE HEAD FORWARD.
Inventors
- 👤 Kenneth R Bangerter
- 👤 John P Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/04; B25B21/00
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |