Patent US3128990A successfully refreshed from Google Patents.
US3128990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning connector for stud tensioners
Assignee: Babcock and Wilcox Co
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Filing: 1961-05-08
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Granted: 1964-04-14
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Brooks
- 👤 Leroy S Demart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:14
CPC Classifications
B; B25; B25B; B25B29/00; B25B29/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN COMBINATION, A STUD TENSIONER HAVING A PEDESTAL AND A RECIPROCABLE MOTOR DISPOSED ABOVE SAID PEDESTAL AND SUPPORTABLE THEREBY, A DRAWBAR CONNECTED TO SAID MOTOR AND EXTENDING DOWNWARDLY WITHIN SAID PEDESTAL, THE LOWER PORTION OF SAID DRAWBAR BEING OF ANNULAR SHAPE WITH AN INTERNAL DIAMETER SUFFICIENTLY LARGE TO PERMIT THE DRAWBAR TO BE FREELY LOWERED OVER A STUD, A CONNECTOR HAVING A NUT DISPOSED WITHIN SAID DRAWBAR AND MOVABLE AXIALLY WITH RESPECT THERETO, AN INTERNAL THREAD ON SAID NUT COMPLEMENTARY TO THE STUD THREAD, FACING SURFACES ON SAID NUT AND DRAWBAR RESPONSIVE TO AN UPWARD FORCE EXERTED ON SAID DRAWBAR WHEN SAID SURFACES ARE IN ENGAGEMENT TO CAUSE AN UPWARD FORCE TO BE EXERTED ON SAID STUD, MEANS FOR MOVING SAID NUT WITH RESPECT TO SAID DRAWBAR BETWEEN AN UPPER POSITION IN WHICH SAID NUT THREADS ARE DISENGAGED FROM SAID STUD AND A LOWER POSITION IN WHICH SAID NUT THREADS ARE ENGAGED WITH SAID STUD, AND A DRIVING MEMBER EXTENDING UPWARDLY FROM SAID NUT AND NON-ROTATABLY
Claim 2
Dependent Claim
166 words
IN COMBINATION, A STUD TENSIONER HAVING A PEDESTAL AND A RECIPROCABLE MOTOR DISPOSED ABOVE SAID PEDESTAL AND SUPPORTABLE THEREBY, A DRAWBAR CONNECTED TO SAID MOTOR AND EXTENDING DOWNWARDLY WITHIN SAID PEDESTAL, THE LOWER PORTION OF SAID DRAWBAR BEING OF ANNULAR SHAPE WITH AN INTERNAL DIAMETER SUFFICIENTLY LARGE TO PERMIT THE DRAWBAR TO BE FREELY LOWERED OVER A STUD, A CONNECTOR HAVING A NUT DISPOSED WITHIN SAID DRAWBAR AND MOVABLE AXIALLY WITH RESPECT THERETO, AN INTERNAL THREAD ON SAID NUT COMPLEMENTARY TO THE STUD THREAD, FACING SURFACES ON SAID NUT AND DRAWBAR RESPONSIVE TO AN UPWARD FORCE EXERTED ON SAID DRAWBAR WHEN SAID SURFACES ARE IN ENGAGEMENT TO CAUSE AN UPWARD FORCE TO BE EXERTED ON SAID STUD, MEANS FOR MOVING SAID NUT WITH RESPECT TO SAID DRAWBAR BETWEEN AN UPPER POSITION IN WHICH SAID NUT THREADS ARE DISENGAGED FROM SAID STUD AND A LOWER POSITION IN WHICH SAID NUT THREADS ARE ENGAGED WITH SAID STUD, AND A DRIVING MEMBER EXTENDING UPWARDLY FROM SAID NUT AND NON-ROTATABLY
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |