Patent JPS538880A successfully refreshed from Google Patents.
US3357501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way reversible gang plow
Assignee: Deere and Co
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Filing: 1965-05-24
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Granted: 1967-12-12
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Glen A Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:39
CPC Classifications
A; A01; A01B; A01B3/00; A01B3/46; A01B3/464
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN COMBINATION, A TRACTOR HAVING A STATIONARY DRAWBAR AND A VERTICALLY-MOVABLE DRAWBAR, A PLOW ASSEMBLY COMPRISING A HORIZONTAL FRAME CONNECTED AT ITS FORWARD END TO SAID MOVABLE DRAWBAR, A VERTICALLY-ADJUSTABLE FURROW WHEEL ASSEMBLY ROTATABLY CONNECTED TO THE REAR END OF THE FRAME, MEANS EXTENDING FROM THE FURROW WHEEL ASSEMBLY TO THE MOVABLE DRAWBAR OF THE TRACTOR FOR ELEVATING AND DEPRESSING THE FURROW WHEEL ASSEMBLY RELATIVE TO THE GROUND FOR ELEVATING AND DEPRESSING THE FRAME, A CARRIER TUBE JOURNALLED ON THE FRAME, DIAMETRICALLY-OPPOSED PLOW GANGS FIXED TO THE TUBE, AND MEANS FOR ROTATING THE TUBE IN OPPOSITE DIRECTIONS WITH THE FRAME IN AN ELEVATED POSITION FOR REVERSING THE RELATIONSHIPS OF THE PLOW GANGS RELATIVE TO THE GROUND AND FOR POSITIONING BOTH PLOW GANGS IN HORIZONTAL POSITIONS OUT OF CONTACT WITH THE GROUND, SAID REVERSING MEANS COMPRISING A TRANSVERSE SUPPORT FIXED ON THE FRAME, A LONGITUDINAL SHAFT JOURNALLED ON THE SUPPORT, A SPROCKET WHEEL FIXED ON THE SHAFT BEHIND
Claim 2
Dependent Claim
157 words
IN COMBINATION, A TRACTOR HAVING A STATIONARY DRAWBAR AND A VERTICALLY-MOVABLE DRAWBAR, A PLOW ASSEMBLY COMPRISING A HORIZONTAL FRAME CONNECTED AT ITS FORWARD END TO SAID MOVABLE DRAWBAR, A VERTICALLY-ADJUSTABLE FURROW WHEEL ASSEMBLY ROTATABLY CONNECTED TO THE REAR END OF THE FRAME, MEANS EXTENDING FROM THE FURROW WHEEL ASSEMBLY TO THE MOVABLE DRAWBAR OF THE TRACTOR FOR ELEVATING AND DEPRESSING THE FURROW WHEEL ASSEMBLY RELATIVE TO THE GROUND FOR ELEVATING AND DEPRESSING THE FRAME, A CARRIER TUBE JOURNALLED ON THE FRAME, DIAMETRICALLY-OPPOSED PLOW GANGS FIXED TO THE TUBE, AND MEANS FOR ROTATING THE TUBE IN OPPOSITE DIRECTIONS WITH THE FRAME IN AN ELEVATED POSITION FOR REVERSING THE RELATIONSHIPS OF THE PLOW GANGS RELATIVE TO THE GROUND AND FOR POSITIONING BOTH PLOW GANGS IN HORIZONTAL POSITIONS OUT OF CONTACT WITH THE GROUND, SAID REVERSING MEANS COMPRISING A TRANSVERSE SUPPORT FIXED ON THE FRAME, A LONGITUDINAL SHAFT JOURNALLED ON THE SUPPORT, A SPROCKET WHEEL FIXED ON THE SHAFT BEHIND
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |