Patent US3555929A successfully refreshed from Google Patents.
US3555929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended root flexsplines
Assignee: QUINCY TECHNOLOGIES Inc A CORP OF DE
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Filing: 1968-08-02
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Granted: 1971-01-19
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Expires: 1988-08-02
Abstract
Abstract A FLEXSPLINE, THE MEMBER CARRYING A CIRCUMFERENTIAL WAVE AND MESHING WITH A COAXIAL CIRCULAR SPLINE TO PROVIDE A HARMONIC DRIVE TYPE ACTUATOR, IS GIVEN A NOVEL, IMPROVED CONFIGURATION MUCH LESS SUSCEPTIBLE TO LOCALIZED STRESSES AT ROOT SECTIONS OF ITS TEETH. THIS NEW FLEXSPLINE PERMITS GREATER RADIAL DEFLECTION WITHOUT EXCESSIVE CONCENTRATED STRESSES, HENCE PROVIDES GREATER FATIGUE LIFE AND A LOWER PRACTICAL LIMIT OF THE DRIVE RATIOS OBTAINABLE WITH HARMONIC DRIVE ACTUATORS.
Inventors
- 👤 John D Hossfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
F; F16; F16H; F16H49/00; F16H49/001; Y; Y10; Y10T; Y10T74/00; Y10T74/19
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |