US3279632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back hoe excavator
Assignee: Individual
•
Filing: 1964-11-27
•
Granted: 1966-10-18
•
Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Lorenz H Kramlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:56
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/32; E02F3/36; E02F3/42; E02F3/427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A BACK HOE EXCAVATOR HAVING A DRAG BOOM PIVOTALLY MOUNTED AT ONE END TO A TRACTOR MOUNTED CAB, A SHOVEL PIVOTALLY MOUNTED TO A FREE END OF SAID BOOM AND MEANS FOR RAISING AND LOWERING SAID BOOM, THE IMPROVEMENT COMPRISING MEANS FOR EXERTING A DOWNWARD FORCE UPON SAID BOOM AS THE SHOVEL IS OPERATED, SAID MEANS COMPRISING REEVING AN OPERATING CABLE CONNECTING A POWER DRUM MOUNTED UPON THE CAB WITH THE SHOVEL UNDERNEATH THE PIVOTAL CONNECTION OF SAID BOOM UPON SAID CAB, SAID MEANS COMPRISING A SHEAVE HAVING A LOWER SURFACE POSITIONED UNDERNEATH SAID PIVOTAL CONNECTION, AND MEANS FOR VARYING SAID DOWNWARD FORCE COMPRISING MEANS FOR VARYING THE POSITION OF SAID SHEAVE WITH RESPECT TO SAID BOOM.
Claim 2
Dependent Claim
118 words
IN A BACK HOE EXCAVATOR HAVING A DRAG BOOM PIVOTALLY MOUNTED AT ONE END TO A TRACTOR MOUNTED CAB, A SHOVEL PIVOTALLY MOUNTED TO A FREE END OF SAID BOOM AND MEANS FOR RAISING AND LOWERING SAID BOOM, THE IMPROVEMENT COMPRISING MEANS FOR EXERTING A DOWNWARD FORCE UPON SAID BOOM AS THE SHOVEL IS OPERATED, SAID MEANS COMPRISING REEVING AN OPERATING CABLE CONNECTING A POWER DRUM MOUNTED UPON THE CAB WITH THE SHOVEL UNDERNEATH THE PIVOTAL CONNECTION OF SAID BOOM UPON SAID CAB, SAID MEANS COMPRISING A SHEAVE HAVING A LOWER SURFACE POSITIONED UNDERNEATH SAID PIVOTAL CONNECTION, AND MEANS FOR VARYING SAID DOWNWARD FORCE COMPRISING MEANS FOR VARYING THE POSITION OF SAID SHEAVE WITH RESPECT TO SAID BOOM.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |