Patent US3667320A successfully refreshed from Google Patents.
US3667320A
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Wave generator configurations
Assignee: QUINCY TECHNOLOGIES Inc A CORP OF DE
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Filing: 1971-01-18
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Granted: 1972-06-06
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Expires: 1991-01-18
Abstract
Abstract In mechanical harmonic drive actuators, an elliptoidal wave shape is employed to generate a circumferential wave of radial deflection. The present invention provides an improved shape for a wave generator cam, specifically a wave generator plug defined by a pair of arc centered on the major axis, a pair of arc centered on the minor axis, and these arcs sharing common points of tangency. Bending stress is reduced in the deflecting member and better load distribution attained in the wave generator bearing.
Inventors
- 👤 Hugh A Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:03
CPC Classifications
F; F16; F16H; F16H49/00; F16H49/001; Y; Y10; Y10T; Y10T74/00; Y10T74/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
For use in a harmonic drive type actuator, a wave generator for imparting a circumferential wave of radial deflection to a flexing member, the wave generator having a peripheral shape comprising a pair of major axis arcs centered on its major axis and a pair of arcs centered on the minor axis, the major axis arcs having equal included angles, respectively, of about 90* to 150* and the minor arcs having equal included angles of about 90* to 30*, respectively, said arcs having common points of tangency.
Claim 2
Dependent Claim
87 words
For use in a harmonic drive type actuator, a wave generator for imparting a circumferential wave of radial deflection to a flexing member, the wave generator having a peripheral shape comprising a pair of major axis arcs centered on its major axis and a pair of arcs centered on the minor axis, the major axis arcs having equal included angles, respectively, of about 90* to 150* and the minor arcs having equal included angles of about 90* to 30*, respectively, said arcs having common points of tangency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |