US3141349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball bearing screw and nut mechanism
Assignee: Milacron Inc
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Filing: 1962-09-17
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Granted: 1964-07-21
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 David I Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:56
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2214; F16H25/2219; F16H25/2209; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18728; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PRELOADED RECIRCULATING BALL BEARING SCREW AND NUT UNIT COMPRISING IN COMBINATION: (A) A SCREW HAVING A HELICAL GROOVE EXTENDING THEREALONG, (B) A PAIR OF NUTS, EACH OF SAID NUTS HAVING A BORE THERETHROUGH TO LOOSELY RECEIVE SAID SCREW AND A HELICAL GROOVE IN SAID BORE OF THE SAME LEAD AS SAID SCREW HELICAL GROOVE, (C) A PLURALITY OF BALLS RECEIVED BETWEEN SAID SCREW AND NUT HELICAL GROOVES TO EFFECT A THREADED ENGAGEMENT FOR TRANSMISSION OF RELATIVE AXIAL FORCES THEREBETWEEN, (D) MEANS TO MAINTAIN SAID NUTS IN ALIGNMENT ON SAID SCREW WITH A RELATIVE TORQUE THEREBETWEEN TENDING TO MOVE SAID NUTS APART WHEREBY SAID SCREW AND NUT GROOVES DEFINE A CONTINUOUS BALL TRACK THROUGH SAID NUTS AND A PRELOAD FORCE IS PRODUCED BETWEEN SAID SCREW AND EACH OF SAID NUTS, AND (E) MEANS TO RECIRCULATE SAID BALLS FROM ONE END OF SAID BALL TRACK TO THE OTHER END THEREOF WHEN SAID NUTS AND SCREW ARE RELATIVELY ROTATED.
Claim 2
Dependent Claim
157 words
A PRELOADED RECIRCULATING BALL BEARING SCREW AND NUT UNIT COMPRISING IN COMBINATION: (A) A SCREW HAVING A HELICAL GROOVE EXTENDING THEREALONG, (B) A PAIR OF NUTS, EACH OF SAID NUTS HAVING A BORE THERETHROUGH TO LOOSELY RECEIVE SAID SCREW AND A HELICAL GROOVE IN SAID BORE OF THE SAME LEAD AS SAID SCREW HELICAL GROOVE, (C) A PLURALITY OF BALLS RECEIVED BETWEEN SAID SCREW AND NUT HELICAL GROOVES TO EFFECT A THREADED ENGAGEMENT FOR TRANSMISSION OF RELATIVE AXIAL FORCES THEREBETWEEN, (D) MEANS TO MAINTAIN SAID NUTS IN ALIGNMENT ON SAID SCREW WITH A RELATIVE TORQUE THEREBETWEEN TENDING TO MOVE SAID NUTS APART WHEREBY SAID SCREW AND NUT GROOVES DEFINE A CONTINUOUS BALL TRACK THROUGH SAID NUTS AND A PRELOAD FORCE IS PRODUCED BETWEEN SAID SCREW AND EACH OF SAID NUTS, AND (E) MEANS TO RECIRCULATE SAID BALLS FROM ONE END OF SAID BALL TRACK TO THE OTHER END THEREOF WHEN SAID NUTS AND SCREW ARE RELATIVELY ROTATED.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |