US3153986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary torque actuator
Assignee: Individual
•
Filing: 1960-12-30
•
Granted: 1964-10-27
•
Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Wallace Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; F15B15/06; F15B15/068; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/1832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A ROTARY TORQUE ACTUATOR COMPRISING A CYLINDER, A PISTON SLIDABLE IN SAID CYLINDER, FLUID INLETS OPENING INTO SAID CYLINDER ON OPPOSITE SIDES OF SAID PISTON, A HOLLOW INTERNALLY AND EXTERNALLY CYLINDRICAL CAM MEMBER IN SAID CYLINDER CONNECTED TO SAID PISTON, SAID CAM MEMBER HAVING A PLURALITY OF INTERNAL AND EXTERNAL CAM FACES FORMED IN ITS CYLINDRICAL SURFACES, AT LEAST TWO OF SAID CAM FACES BEING ON THE SAME SURFACE AND BEING HELICAL ABOUT THE AXIS OF SAID CYLINDER, A PLURALITY OF CAM FOLLOWERS DISPOSED TO RIDE AGAINST SAID EXTERNAL CAM FACES, AN ECCENTRICALLY ADJUSTABLE MEANS RESPECTIVELY RELATED TO EACH BUT ONE OF SAID CAM FOLLOWERS FOR ADJUSTING THE RELATED FOLLOWER RELATIVE TO SAID CAM FACES, A DRIVE SHAFT PROJECTING FROM SAID CYLINDER AND BEING JOURNALLED IN AN END THEREOF FOR ROTATIONAL MOVEMENT, AND AT LEAST TWO OTHER CAM FOLLOWERS CARRIED BY SAID DRIVE SHAFT AND DISPOSED IN ENGAGEMENT WITH SAID INNER CAM FACES FOR IMPARTING ROTATIONAL MOVEMENT TO SAID SHAFT UPON LONGITUDINAL MOVEMENT OF SAID CYLINDER.
Claim 2
Dependent Claim
166 words
A ROTARY TORQUE ACTUATOR COMPRISING A CYLINDER, A PISTON SLIDABLE IN SAID CYLINDER, FLUID INLETS OPENING INTO SAID CYLINDER ON OPPOSITE SIDES OF SAID PISTON, A HOLLOW INTERNALLY AND EXTERNALLY CYLINDRICAL CAM MEMBER IN SAID CYLINDER CONNECTED TO SAID PISTON, SAID CAM MEMBER HAVING A PLURALITY OF INTERNAL AND EXTERNAL CAM FACES FORMED IN ITS CYLINDRICAL SURFACES, AT LEAST TWO OF SAID CAM FACES BEING ON THE SAME SURFACE AND BEING HELICAL ABOUT THE AXIS OF SAID CYLINDER, A PLURALITY OF CAM FOLLOWERS DISPOSED TO RIDE AGAINST SAID EXTERNAL CAM FACES, AN ECCENTRICALLY ADJUSTABLE MEANS RESPECTIVELY RELATED TO EACH BUT ONE OF SAID CAM FOLLOWERS FOR ADJUSTING THE RELATED FOLLOWER RELATIVE TO SAID CAM FACES, A DRIVE SHAFT PROJECTING FROM SAID CYLINDER AND BEING JOURNALLED IN AN END THEREOF FOR ROTATIONAL MOVEMENT, AND AT LEAST TWO OTHER CAM FOLLOWERS CARRIED BY SAID DRIVE SHAFT AND DISPOSED IN ENGAGEMENT WITH SAID INNER CAM FACES FOR IMPARTING ROTATIONAL MOVEMENT TO SAID SHAFT UPON LONGITUDINAL MOVEMENT OF SAID CYLINDER.
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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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |