US3138035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-backlash pinion
Assignee: North American Aviation Corp
•
Filing: 1961-06-12
•
Granted: 1964-06-23
•
Expires: 1981-06-12
Abstract
No abstract record available.
Inventors
- 👤 Armen H Sivaslian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/18; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19898
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
IN COMBINATION: A FIRST GEAR HAVING A FIRST SHAFT, SAID FIRST SHAFT BEING HOLLOW ALONG ITS AXIS AND HAVING A JOURNAL BEARING FORMED THEREIN IN THE REGION OF SAID FIRST GEAR AND FURTHER HAVING A NOTCH FORMED IN ONE END THEREOF, A SECOND GEAR HAVING A SECOND SHAFT, SAID SECOND SHAFT BEING HOLLOW ALONG ITS AXIS AND HAVING A NOTCH LOCATED AT ONE END THEREOF IN THE REGION OF SAID SECOND GEAR, SAID NOTCH IN THE REGION OF SAID SECOND GEAR PROVIDING MEANS FOR APPLYING TORQUE TO SAID SECOND GEAR RELATIVE TO SAID FIRST GEAR, SAID SECOND SHAFT BEING POSITIONED TO ROTATE IN SAID JOURNAL BEARING; TORSION SPRING MEANS POSITIONED IN THE NOTCHES OF SAID FIRST AND SECOND SHAFTS FOR FORCING SAID GEARS AXIALLY TOGETHER AND FOR APPLYING ANTI-BACKLASH TORQUE TO ONE OF SAID GEARS WITH RESPECT TO THE OTHER, AND A THIRD GEAR CONNECTED TO ENGAGE SAID FIRST AND SECOND GEARS.
References Cited (Backward Citations)
US1197261A
Cited
US1554889A
Cited
DE596082C
Cited
US2163836A
Cited
US2663198A
Cited
US2845809A
Cited
US2868033A
Cited
US2966806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |