Patent US3422696A successfully refreshed from Google Patents.
US3422696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double ball nut and screw actuator
Assignee: SARGENT ENG CORP
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Filing: 1964-03-27
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Granted: 1969-01-21
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Peter Valenti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:38
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2056; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
IN A BALL SCREW ACTUATOR, THE COMBINATION OF: A SUPPORT MEMBER, A HOLLOW NONROTARY SCREW FIXED AT ONE END TO SAID SUPPORT MEMBER, A ROTARY NUT MOUNTED TO TURN ON SAID SCREW, A HOLLOW ROTARY SCREW SECURED TO TURN WITH SAID ROTARY NUT, SAID SCREWS BEING COAXIAL AND TELESCOPICALLY ARRANGED, ONE HAVING A RIGHT-HAND HELIX AND THE OTHER HAVING A LEFT-HAND HELIX, A NONROTARY NUT MOUNTED ON SAID ROTARY SCREW, MEANS FOR RESTRAINING SAID NUT FROM ROTATION, BALLS INTERPOSED BETWEEN EACH OF SAID SCREWS AND ITS RESPECTIVE NUT, A DRIVE SHAFT ROTATABLY MOUNTED ON THE SUPPORT MEMBER AND EXTENDING THROUGH SAID NONROTARY SCREW, A SPLINE DRIVE ELEMENT FIXED ON THE DRIVESHAFT REMOTE FROM SAID SUPPORT MEMBER, AN AXIAL INTERNAL SPLINE ELEMENT ON SAID ROTARY SCREW SLIDABLY ENGAGED BY SAID SPLINE DRIVE ELEMENT, WHEREBY ROTATION OF THE DRIVESHAFT CAUSES SIMULTANEOUS AXIAL TRAVEL OF EACH NUT UPON ITS RESPECTIVE SCREW, EACH NUT HAVING AN AXIAL LENGTH MATERIALLY SHORTER THAN ITS RESPECTIVE SCREW WHEREBY BOTH SCREWS PROJECT BEYOND BOTH NUTS WHEN THE DRIVE SHAFT IS TURNED TO RETRACT SAID NUTS, AND STOP MEANS FOR LIMITING AXIAL TRAVEL OF ONE OF THE NUTS IN ONE DIRECTION AND OF THE OTHER NUT IN THE OTHER DIRECTION.
Claim 2
Dependent Claim
201 words
IN A BALL SCREW ACTUATOR, THE COMBINATION OF: A SUPPORT MEMBER, A HOLLOW NONROTARY SCREW FIXED AT ONE END TO SAID SUPPORT MEMBER, A ROTARY NUT MOUNTED TO TURN ON SAID SCREW, A HOLLOW ROTARY SCREW SECURED TO TURN WITH SAID ROTARY NUT, SAID SCREWS BEING COAXIAL AND TELESCOPICALLY ARRANGED, ONE HAVING A RIGHT-HAND HELIX AND THE OTHER HAVING A LEFT-HAND HELIX, A NONROTARY NUT MOUNTED ON SAID ROTARY SCREW, MEANS FOR RESTRAINING SAID NUT FROM ROTATION, BALLS INTERPOSED BETWEEN EACH OF SAID SCREWS AND ITS RESPECTIVE NUT, A DRIVE SHAFT ROTATABLY MOUNTED ON THE SUPPORT MEMBER AND EXTENDING THROUGH SAID NONROTARY SCREW, A SPLINE DRIVE ELEMENT FIXED ON THE DRIVESHAFT REMOTE FROM SAID SUPPORT MEMBER, AN AXIAL INTERNAL SPLINE ELEMENT ON SAID ROTARY SCREW SLIDABLY ENGAGED BY SAID SPLINE DRIVE ELEMENT, WHEREBY ROTATION OF THE DRIVESHAFT CAUSES SIMULTANEOUS AXIAL TRAVEL OF EACH NUT UPON ITS RESPECTIVE SCREW, EACH NUT HAVING AN AXIAL LENGTH MATERIALLY SHORTER THAN ITS RESPECTIVE SCREW WHEREBY BOTH SCREWS PROJECT BEYOND BOTH NUTS WHEN THE DRIVE SHAFT IS TURNED TO RETRACT SAID NUTS, AND STOP MEANS FOR LIMITING AXIAL TRAVEL OF ONE OF THE NUTS IN ONE DIRECTION AND OF THE OTHER NUT IN THE OTHER DIRECTION.
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |