Patent US3129671A successfully refreshed from Google Patents.
US3129671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monorail tractor
Assignee: Textron Systems Corp
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Filing: 1961-08-21
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Granted: 1964-04-21
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Vanderbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
B; B61; B61C; B61C13/00; B61C13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
IN COMBINATION WITH AN OVERHEAD BEAM PROVIDING OPPOSED UPPER ROLLER SURFACES AND A LOWER TRACTION SURFACE, A PAIR OF VERTICALLY DISPOSED ROLLER FRAMES ARRANGED IN PARALLEL RELATION AND EACH OF SAID FRAMES HAVING AT LEAST ONE ROLLER JOURNALLED THEREON, A FIRST TIE ROD BETWEEN THE FRAMES ADJACENT ONE END AND A SECOND TIE ROD BETWEEN THE FRAMES ADJACENT THE OPPOSITE END, SAID TIE RODS SPACING THE ROLLERS FOR RECEPTION ON THE UPPER SURFACES OF THE OVERHEAD BEAM, A PAIR OF VERTICALLY DISPOSED TRACTION WHEEL SUPPORTS, ONE SUPPORT ARRANGED IN SPACED PARALLEL RELATION EXTERIORLY OF ONE OF THE ROLLER FRAMES AND THE OTHER SUPPORT ARRANGED IN SPACED PARALLEL RELATION EXTERIORLY OF THE OTHER OF THE ROLLER FRAMES, MEANS PIVOTALLY MOUNTING THE TRACTION WHEEL SUPPORTS TO THE ROLLER FRAMES ADJACENT ONE END, A TRANSVERSE BRACE SECURING THE OPPOSITE END OF THE TRACTION WHEEL SUPPORTS TOGETHER, SPRING MEANS SECURED BETWEEN THE SECOND TIE ROD AND SAID TRANSVERSE BRACE, AN AXLE ROTATABLY MOUNTED IN SAID TRACTION WHEEL SUPPORTS HAVING A TRACTION WHEEL DISPOSED BENEATH THE LOWER SURFACE OF THE OVERHEAD BEAM, SAID SPRING MEANS BIASING THE TRACTION WHEEL IN CONTACT WITH THE LOWER TRACTION SURFACE OF SAID OVERHEAD BEAM AND OPERATING MEANS INCLUDING A MOTOR CARRIED BY THE
Claim 2
Dependent Claim
204 words
IN COMBINATION WITH AN OVERHEAD BEAM PROVIDING OPPOSED UPPER ROLLER SURFACES AND A LOWER TRACTION SURFACE, A PAIR OF VERTICALLY DISPOSED ROLLER FRAMES ARRANGED IN PARALLEL RELATION AND EACH OF SAID FRAMES HAVING AT LEAST ONE ROLLER JOURNALLED THEREON, A FIRST TIE ROD BETWEEN THE FRAMES ADJACENT ONE END AND A SECOND TIE ROD BETWEEN THE FRAMES ADJACENT THE OPPOSITE END, SAID TIE RODS SPACING THE ROLLERS FOR RECEPTION ON THE UPPER SURFACES OF THE OVERHEAD BEAM, A PAIR OF VERTICALLY DISPOSED TRACTION WHEEL SUPPORTS, ONE SUPPORT ARRANGED IN SPACED PARALLEL RELATION EXTERIORLY OF ONE OF THE ROLLER FRAMES AND THE OTHER SUPPORT ARRANGED IN SPACED PARALLEL RELATION EXTERIORLY OF THE OTHER OF THE ROLLER FRAMES, MEANS PIVOTALLY MOUNTING THE TRACTION WHEEL SUPPORTS TO THE ROLLER FRAMES ADJACENT ONE END, A TRANSVERSE BRACE SECURING THE OPPOSITE END OF THE TRACTION WHEEL SUPPORTS TOGETHER, SPRING MEANS SECURED BETWEEN THE SECOND TIE ROD AND SAID TRANSVERSE BRACE, AN AXLE ROTATABLY MOUNTED IN SAID TRACTION WHEEL SUPPORTS HAVING A TRACTION WHEEL DISPOSED BENEATH THE LOWER SURFACE OF THE OVERHEAD BEAM, SAID SPRING MEANS BIASING THE TRACTION WHEEL IN CONTACT WITH THE LOWER TRACTION SURFACE OF SAID OVERHEAD BEAM AND OPERATING MEANS INCLUDING A MOTOR CARRIED BY THE
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |