Patent US3134493A successfully refreshed from Google Patents.
US3134493A
Expired / Lapsed
US
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Excavating and loading attachment for tractors
Assignee: Massey Ferguson Inc
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Filing: 1960-10-14
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Granted: 1964-05-26
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Expires: 1980-10-14
Abstract
No abstract record available.
Inventors
- 👤 King James Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/3405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN ATTACHMENT FOR TRACTORS COMPRISING, IN COMBINATION, A FRAME ADAPTED TO BE MOUNTED ON A TRACTOR, AN ELONGATED BOOM COMPRISING A PAIR OF RIGID SECTIONS HINGED TOGETHER, MEANS PIVOTALLY SUPPORTING ONE SECTION OF THE BOOM ADJACENT ITS FREE END ON SAID FRAME TO SWING IN A VERTICAL PLANE BETWEEN A LOWERED SUBSTANTIALLY VERTICAL DIGGING POSITION AND A RAISED DUMPING POSITION, A LOAD DEVICE PIVOTALLY MOUNTED AT THE FREE END OF THE OTHER BOOM SECTION, AND A RIGID LINK CONNECTED BETWEEN SAID FRAME AND SAID OTHER BOOM SECTION OPERATIVE TO VARY THE ANGULAR RELATION OF THE SECTIONS SO THAT THE LENGTH OF THE LEVER ARM DEFINED BY THE BOOM IS REDUCED TO A MINIMUM WHEN THE BOOM IS IN THE DIGGING POSITION AND IS INCREASED TO A MAXIMUM WHEN THE BOOM IS RAISED TO DUMPING POSITION.
Claim 2
Dependent Claim
135 words
AN ATTACHMENT FOR TRACTORS COMPRISING, IN COMBINATION, A FRAME ADAPTED TO BE MOUNTED ON A TRACTOR, AN ELONGATED BOOM COMPRISING A PAIR OF RIGID SECTIONS HINGED TOGETHER, MEANS PIVOTALLY SUPPORTING ONE SECTION OF THE BOOM ADJACENT ITS FREE END ON SAID FRAME TO SWING IN A VERTICAL PLANE BETWEEN A LOWERED SUBSTANTIALLY VERTICAL DIGGING POSITION AND A RAISED DUMPING POSITION, A LOAD DEVICE PIVOTALLY MOUNTED AT THE FREE END OF THE OTHER BOOM SECTION, AND A RIGID LINK CONNECTED BETWEEN SAID FRAME AND SAID OTHER BOOM SECTION OPERATIVE TO VARY THE ANGULAR RELATION OF THE SECTIONS SO THAT THE LENGTH OF THE LEVER ARM DEFINED BY THE BOOM IS REDUCED TO A MINIMUM WHEN THE BOOM IS IN THE DIGGING POSITION AND IS INCREASED TO A MAXIMUM WHEN THE BOOM IS RAISED TO DUMPING POSITION.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |