US3206994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw jack brake device
Assignee: Individual
•
Filing: 1963-11-19
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Granted: 1965-09-21
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert J Angsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:05
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F16H25/2454; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A SCREW JACK ASSEMBLY COMPRISING A ROTATABLE THREADED SHAFT HAVING A TRVELING NUT THREADABLY MOUNTED THEREON THE IMPROVEMENT WHICH COMPRISES A SLIDING MEMBER MOUNTED ON THE SCREW SHAFT BETWEEN THE END THEREOF AND THE TRAVELING NUT AND ADJACENT TO SAID NUT, SAID MEMBER BEING MOUNTED SO AS TO PERMIT THE MEMBER TO MOVE LONGITUDINALLY ALONG THE SHAFT WHILE ROTATING WITH THE SHAFT; A FLEXIBLE, RESILIENT BRAKE LOOSELY MOUNTED ON SAID SHAFT ADJACENT SAID SLIDING MEMBER AND NON-ROTATING ELEMENT DISPOSED ADJACENT TO SAID BRAKE ELEMENT SO AS TO PRODUCE FRICTIONAL CONTACT WITH SAID BRAKE WHEN ROTATION OF THE SHAFT CAUSES THE TRVELING NUT TO PUSH THE SLIDING MEMBER INTO CONTACT WITH THE BRAKE, THE AREA OF CONTACT BETWEEN THE SLIDING MEMBER, THE BRAKE, AND THE NON-ROTATING MEMBER BEING SUFFICIENT TO CREATE A FRICTIONAL FORCE GREATER THAN THE ROTATIONAL FORCE ON THE SHAFT.
Claim 2
Dependent Claim
142 words
IN A SCREW JACK ASSEMBLY COMPRISING A ROTATABLE THREADED SHAFT HAVING A TRVELING NUT THREADABLY MOUNTED THEREON THE IMPROVEMENT WHICH COMPRISES A SLIDING MEMBER MOUNTED ON THE SCREW SHAFT BETWEEN THE END THEREOF AND THE TRAVELING NUT AND ADJACENT TO SAID NUT, SAID MEMBER BEING MOUNTED SO AS TO PERMIT THE MEMBER TO MOVE LONGITUDINALLY ALONG THE SHAFT WHILE ROTATING WITH THE SHAFT; A FLEXIBLE, RESILIENT BRAKE LOOSELY MOUNTED ON SAID SHAFT ADJACENT SAID SLIDING MEMBER AND NON-ROTATING ELEMENT DISPOSED ADJACENT TO SAID BRAKE ELEMENT SO AS TO PRODUCE FRICTIONAL CONTACT WITH SAID BRAKE WHEN ROTATION OF THE SHAFT CAUSES THE TRVELING NUT TO PUSH THE SLIDING MEMBER INTO CONTACT WITH THE BRAKE, THE AREA OF CONTACT BETWEEN THE SLIDING MEMBER, THE BRAKE, AND THE NON-ROTATING MEMBER BEING SUFFICIENT TO CREATE A FRICTIONAL FORCE GREATER THAN THE ROTATIONAL FORCE ON THE SHAFT.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |