Patent US3738431A successfully refreshed from Google Patents.
US3738431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sod cutter cutoff blade mounting
Assignee: Brouwer Turf Equipment Ltd
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Filing: 1971-04-12
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Granted: 1973-06-12
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Expires: 1991-04-12
Abstract
Abstract Disclosed herein is a sod cutter including a parallel linkage pivotally mounting a generally planar transverse cutoff blade on a frame such that the blade is movable into and out of the ground in response to travel of the cutter along the ground, such that the angular relation of the blade to the frame is constant during movement into and out of the ground, and such that the blade moves downwardly and rearwardly relative to the frame during movement of the blade into the ground, and such that the blade moves upwardly and forwardly relative to the frame during movement of the blade out of the ground.
Inventors
- 👤 R Gennow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
A; A01; A01G; A01G20/00; A01G20/10; A01G20/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
As sod cutter comprising a frame, means for movably supporting said frame for travel over the ground, means on said frame for stripping a ribbon of sod in response to travel of said frame along the ground, a cutoff blade adapted to transversely sever the sod ribbon in response to movement of said blade into the ground, (and) means movably mounting said blade on said frame (such that said blade is movable into and out of the ground in response to travel of said frame along the ground and) for travel along an arcuate path without changing the angular relation of said blade to said frame, and means on said frame and connected to said blade for moving said blade back and forth along said path and into and out of the ground in response to travel of said frame along the ground.
Claim 2
Dependent Claim
143 words
As sod cutter comprising a frame, means for movably supporting said frame for travel over the ground, means on said frame for stripping a ribbon of sod in response to travel of said frame along the ground, a cutoff blade adapted to transversely sever the sod ribbon in response to movement of said blade into the ground, (and) means movably mounting said blade on said frame (such that said blade is movable into and out of the ground in response to travel of said frame along the ground and) for travel along an arcuate path without changing the angular relation of said blade to said frame, and means on said frame and connected to said blade for moving said blade back and forth along said path and into and out of the ground in response to travel of said frame along the ground.
Claim 3
Dependent Claim
39 words
A sod cutter in accordance with claim 1 wherein said means movably mounting said blade on said frame is such that said blade moves downwardly and rearwardly relative to said frame during movement of said blade into the ground.
Claim 4
Dependent Claim
40 words
A sod cutter in accordance with claim 1 wherein said means movably mounting said blade on said frame is such that said blade moves upwardly and forwardly relative to said frame during movement of said blade out of the ground.
Claim 5
Dependent Claim
78 words
A sod cutter in accordance with claim 1 wherein said means mounting said blade on said frame comprises a pair of parallel links pivotally connected to said blade and to said frame, and wherein said blade moving means is connected to one of said parallel links for oscillating said link relative to said frame in response to travel of said frame along the ground and so as to move said cutoff blade into and out of said ground.
Claim 6
Dependent Claim
30 words
A sod cutter in accordance with claim 4 wherein said blade moving means comprises a one-way clutch including an eccentric drive comprising a member pivotally connected to said one link.
Claim 7
Dependent Claim
208 words
A sod cutter comprising a frame, means for movably supporting said frame for travel over the ground, means on said frame for stripping a ribbon of sod in response to travel of said frame along the ground, a cutoff blade adapted to transversely sever the sod ribbon in response to movement of said blade into the ground, a pair of parallel links pivotally connected to said blade and to said frame, a one revolution clutch mounted on said frame and including an output shaft, an eccentric fixed to said output shaft, and a drive member receiving said eccentric and drivingly connected to one of said parallel links intermediate the ends thereof such that, in response to travel of said frame along the ground, operation of said clutch causes oscillation of said parallel links and said cutoff blade so as to move said blade into and out of the ground and along an arcuate path without changing the angular relation of said blade to said frame and so that said blade moves downwardly and rearwardly relative to said frame during movement of said blade into the ground and so that said blade moves upwardly and forwardly relative to said frame during movement of said blade out of the ground.
Claim 8
Dependent Claim
208 words
A sod cutter comprising a frame, means for movably supporting said frame for travel over the ground, means on said frame for stripping a ribbon of sod in response to travel of said frame along the ground, a cutoff blade adapted to transversely sever the sod ribbon in response to movement of said blade into the ground, a pair of parallel links pivotally connected to said blade and to said frame, a one revolution clutch mounted on said frame and including an output shaft, an eccentric fixed to said output shaft, and a drive member receiving said eccentric and drivingly connected to one of said parallel links intermediate the ends thereof such that, in response to travel of said frame along the ground, operation of said clutch causes oscillation of said parallel links and said cutoff blade so as to move said blade into and out of the ground and along an arcuate path without changing the angular relation of said blade to said frame and so that said blade moves downwardly and rearwardly relative to said frame during movement of said blade into the ground and so that said blade moves upwardly and forwardly relative to said frame during movement of said blade out of the ground.
Claim 9
Dependent Claim
61 words
A sod cutter in accordance with claim 1 wherein said means movably mounting said blade on said frame is such that said blade moves downwardly and rearwardly relative to said frame during movement of said blade into the ground and such that said blade moves upwardly and forwardly relative to said frame during movement of said blade out of the ground.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |