Patent US3295612A successfully refreshed from Google Patents.
US3295612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control linkage for earthworking tools
Assignee: Caterpillar Inc
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Filing: 1964-11-12
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Granted: 1967-01-03
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Roy E Mayo
- 👤 Wayne E Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/30; E02F5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
DRAFT AND CONTROL LINKAGE BETWEEN A TRACTOR AND A FRAME SUPPORTING A RIPPER SHANK COMPRISING UPPER AND LOWER PAIRS OF LINKS PIVOTALLY CONNECTED BETWEEN THE TRACTOR AND THE FRAME FOR SWINGING MOVEMENT IN A VERTICAL PLANE, SAID RIPPER SHANK HAVING A NORMAL EARTH ENGAGING ANGULAR POSITION AND SAID LINKS BEING NORMALLY SUBSTANTIALLY PARALLEL AND HORIZONTAL, WITH SAID FRAME PIVOTAL CONNECTIONS BEING NORMALLY IN A DIAGONAL PLANE, SAID PIVOT POINTS OF SAID LINKS APPROACHING A PARALLELOGRAM SUFFICIENTLY CLOSE TO HOLD THE RIPPER SHANK AT SUBSTANTIALLY THE SAME ANGLE AS IT IS SWUNG UPWARDLY THROUGH THE GROUND FROM SAID NORMAL POSITION, BUT SAID LOWER LINKS BEING LONGER THAN THE UPPER LINKS AND ARRANGED TO CAUSE FASTER SWINGING OF THE UPPER LINKS WHEN THE RIPPER SHANK HAS
Claim 2
Dependent Claim
124 words
DRAFT AND CONTROL LINKAGE BETWEEN A TRACTOR AND A FRAME SUPPORTING A RIPPER SHANK COMPRISING UPPER AND LOWER PAIRS OF LINKS PIVOTALLY CONNECTED BETWEEN THE TRACTOR AND THE FRAME FOR SWINGING MOVEMENT IN A VERTICAL PLANE, SAID RIPPER SHANK HAVING A NORMAL EARTH ENGAGING ANGULAR POSITION AND SAID LINKS BEING NORMALLY SUBSTANTIALLY PARALLEL AND HORIZONTAL, WITH SAID FRAME PIVOTAL CONNECTIONS BEING NORMALLY IN A DIAGONAL PLANE, SAID PIVOT POINTS OF SAID LINKS APPROACHING A PARALLELOGRAM SUFFICIENTLY CLOSE TO HOLD THE RIPPER SHANK AT SUBSTANTIALLY THE SAME ANGLE AS IT IS SWUNG UPWARDLY THROUGH THE GROUND FROM SAID NORMAL POSITION, BUT SAID LOWER LINKS BEING LONGER THAN THE UPPER LINKS AND ARRANGED TO CAUSE FASTER SWINGING OF THE UPPER LINKS WHEN THE RIPPER SHANK HAS
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |