US3304794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanisms incorporating recirculating ball screw-jacks
Assignee: BAC AND BRITISH AEROSPACE
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Filing: 1965-01-21
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Granted: 1967-02-21
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Bird Walter John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2209; B; B66; B66F; B66F3/00; B66F3/08; F16H25/2003; F16H2025/2012; F16H25/24; F16H25/2472; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18728; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19744; Y10T74/19749; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE COMBINATION OF A RECIRCULATING BALL NUT AND A PLAIN NUT ELEMENT OF CONVENTIONAL IRREVERSIBLE FORM, OPERATIVELY CONNECTED TO OPERATE TANDEMWISE UPON THE SAME SCREW AND CONNECTED TOGETHER FOR LIMITED RELATIVE ROTATIONAL MOTION ON THE THREAD OF SAID SCREW, THE ARRANGEMENT BEING SUCH THAT IN NORMAL OPERATION THE ROTATION OF THE SCREW IS FIRST EFFECTIVE TO ROTATE THE PLAIN NUT UNTIL THE CLEARANCE OF THE RECIRCULATING BALL NUT ON THE SCREW HAS BEEN TAKEN UP, WHEREUPON THE LOAD IS TRANSFERRED TO THE RECIRCULATING BALL NUT.
Claim 2
Dependent Claim
85 words
THE COMBINATION OF A RECIRCULATING BALL NUT AND A PLAIN NUT ELEMENT OF CONVENTIONAL IRREVERSIBLE FORM, OPERATIVELY CONNECTED TO OPERATE TANDEMWISE UPON THE SAME SCREW AND CONNECTED TOGETHER FOR LIMITED RELATIVE ROTATIONAL MOTION ON THE THREAD OF SAID SCREW, THE ARRANGEMENT BEING SUCH THAT IN NORMAL OPERATION THE ROTATION OF THE SCREW IS FIRST EFFECTIVE TO ROTATE THE PLAIN NUT UNTIL THE CLEARANCE OF THE RECIRCULATING BALL NUT ON THE SCREW HAS BEEN TAKEN UP, WHEREUPON THE LOAD IS TRANSFERRED TO THE RECIRCULATING BALL NUT.
References Cited (Backward Citations)
US2447439A
Cited
US2623403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |