Patent US4416335A successfully refreshed from Google Patents.
US4416335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground-clearing and mound-building scarifier
Assignee: STOREBRO BRUKS AB
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Filing: 1981-12-07
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Granted: 1983-11-22
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Expires: 2001-12-07
Abstract
Abstract A ground-clearing and mound-building device is provided that can be towed along the ground to move material on the surface to one side, expose the surface of the ground, and build mounds on the cleared ground for planting and forest regeneration, having a scarifier means mounted for rotation about its central axis, circular in cross-section, and having a peripheral surface that digs into the ground during rotation thereof when in contact with the ground under pressure, arranged to be brought into contact with the ground at any selected contact pressure; with control of at least one of the selected contact pressure and the selected rotation rate to dig, loosen, and displace a surface layer of the ground and push such loosened ground into mounds.
Inventors
- 👤 Stig-Gunnar Lofgren
- 👤 Bo G. Ekeborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:47
CPC Classifications
A; A01; A01G; A01G23/00; A01B; A01B33/00; A01C; A01C5/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A ground-clearing and mound-building device that can be towed along the ground to move material on the surface to one side, expose the surface of the ground, and build mounds on the cleared ground for planting and forest regeneration, comprising, in combination: (1) a frame arranged to be attached to a vehicle above the ground; (2) a scarifying means mounted on the frame for rotation abouts its central axis, circular in cross-section and having a peripheral surface that digs into the ground during rotation thereof when in contact with the ground under pressure; (3) means for moving the scarifying means into and away from contact when the ground and arranged to bring the scarifying means into such contact with the ground at any of a plurality of selected contact pressures; (4) drive means for rotating the scarifying means at a selected rotation rate; and (5) means for controlling at least one of the selected contact pressure and the selected rotation rate to dig, loosen, and displace a surface layer of the ground and push such loosened ground into mounds.
Claim 2
Dependent Claim
179 words
A ground-clearing and mound-building device that can be towed along the ground to move material on the surface to one side, expose the surface of the ground, and build mounds on the cleared ground for planting and forest regeneration, comprising, in combination: (1) a frame arranged to be attached to a vehicle above the ground; (2) a scarifying means mounted on the frame for rotation abouts its central axis, circular in cross-section and having a peripheral surface that digs into the ground during rotation thereof when in contact with the ground under pressure; (3) means for moving the scarifying means into and away from contact when the ground and arranged to bring the scarifying means into such contact with the ground at any of a plurality of selected contact pressures; (4) drive means for rotating the scarifying means at a selected rotation rate; and (5) means for controlling at least one of the selected contact pressure and the selected rotation rate to dig, loosen, and displace a surface layer of the ground and push such loosened ground into mounds.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1 in which the means for controlling one of contact pressure and rotation rate is arranged to increase contact pressure to a pressure at which the advancing scarifying means forms a mound of soil in front of it and then decreases contact pressure to deposit the mound.
Claim 4
Dependent Claim
55 words
Apparatus according to claim 1 in which the means for controlling one of contact pressure and rotation rate is arranged to increase the speed at which the scarifying means rotates to a speed at which the advancing scarifying means forms a mound in front, and then decrease the speed of rotation to deposit the mound.
Claim 5
Dependent Claim
65 words
Apparatus according to claim 1 comprising measuring means arranged to measure the distance travelled by the scarifying means over the surface of the ground and at a predetermined distance send a control signal to the controlling means to change at least one of the contact pressure and rate of rotation of the scarifying means while keeping the scarifying means constantly in contact with the ground.
Claim 6
Dependent Claim
27 words
Apparatus according to claim 1 in which the scarifying means is a truncated cone, with the apex of said cone arranged to extend outwardly from the vehicle.
Claim 7
Dependent Claim
18 words
Apparatus according to claim 5, in which the cone has a plurality of digging protuberances on its surface.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 1 in which the scarifying means is a disc.
Claim 9
Dependent Claim
21 words
Apparatus according to claim 1 in which the means for moving the scarifying means and the drive means are hydraulically operated.
Claim 10
Dependent Claim
21 words
Apparatus according to claim 1 in which the means for moving the scarifying means and the drive means are mechanically operated.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |