US3911979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cutting down tree stems
Assignee: Individual
•
Filing: 1974-05-13
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Granted: 1975-10-14
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Expires: 1994-05-13
Abstract
Abstract A device for cutting down tree stems. It has a wheeled frame defining a central aperture into which a chassis is mounted for oscillating movement, at one end, about an axis transverse to the frame, a pair of hydraulic jacks at the other end of the frame being connected to the chassis to oscillate it. A carrier is mounted on the chassis to be moved reciprocally longitudinally on riding tracks provided alongside the chassis, the carrier being displaceable by means of hydraulic jacks. The said carrier has a pair of rotary disks extending beneath the chassis and rotatable in opposite directions about parallel axes extending longitudinally of the chassis. These disks have forwardly projecting cutters whereby they may be set behind a stump and brought into rotation, and said carrier may be moved forwardly toward and into the stump to nibble at it and cut it down.
Inventors
- 👤 Joseph Rousseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:47
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/06; A01G23/067
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A device for cutting out tree stumps comprising: a. a frame b. a chassis mounted within said frame c. a carrier mounted on said chassis d. a pair of discs mounted on said carrier and rotatable in opposite directions; and e. forwardly projecting cutters distributed on each disc along a single line, each line respectively defining a spiral the lines for each disc, starting at the periphery, forming two pitches of opposite direction and complimentary disposition; the cutters on each disc being symmetrically disposed so as to converge during rotation of the discs thereby being capable of simultaneously cutting into the stump, the directions of rotation of the discs drawing the machine toward the ground.
Claim 2
Independent Claim
115 words
A device for cutting out tree stumps comprising: a. a frame b. a chassis mounted within said frame c. a carrier mounted on said chassis d. a pair of discs mounted on said carrier and rotatable in opposite directions; and e. forwardly projecting cutters distributed on each disc along a single line, each line respectively defining a spiral the lines for each disc, starting at the periphery, forming two pitches of opposite direction and complimentary disposition; the cutters on each disc being symmetrically disposed so as to converge during rotation of the discs thereby being capable of simultaneously cutting into the stump, the directions of rotation of the discs drawing the machine toward the ground.
Claim 3
Dependent Claim
28 words
A device as claimed in claim 1 wherein said forwardly projecting cutters are disposed on the forward faces, along the peripheries and along the edges of said discs.
Claim 4
Dependent Claim
28 words
A device as claimed in claim 2, wherein said cutters disposed along the edges of said discs are spaced from one another and angularly disposed for frontal cutting.
Claim 5
Dependent Claim
30 words
A device as claimed in claim 1, wherein said discs are brought into rotation by a transmission means adapted to be coupled to a power take-off of a drawing vehicle.
Claim 6
Dependent Claim
38 words
A device as claimed in claim 1, wherein said carrier includes parallel rotary shafts on which said discs are rigidly mounted so that the respective cutters are symmetrically placed to be capable of penetrating into said stump simultaneously.
Claim 7
Dependent Claim
41 words
A device as claimed in claim 5, wherein said shafts are spaced apart a distance such that said discs partially overlap and are fixed on said shafts to be spaced apart a distance sufficient to free the respective cutters for rotation.
Claim 8
Dependent Claim
152 words
A device as claimed in claim 1, wherein: said frame is a wheeled frame defining a central aperture and having a front and rear end; said chassis is mounted at one end on said frame withiN said aperture and is capable of substantially vertical movement pivotal about an axis transverse to said frame and means to pivot said chassis about said axis, said chassis having a pair of longitudinally extending riding tracks; said carrier is mounted on said chassis and is capable of reciprocal longitudinal movement on said riding tracks and means to move said carrier along said riding tracks; and said pair of discs, extend beneath said chassis, and rotate about parallel axes extending longitudinally of said chassis; whereby said discs may be set behind a stump and brought into rotation, and said carrier may be moved forwardly toward and into said stump to nibble at it and cut it out.
Claim 9
Dependent Claim
44 words
A device as claimed in claim 7, wherein said means moving said carrier on said riding tracks are power jacks, one end of which is mounted on said carrier and the other end of which is mounted on the forward end of said chassis.
Claim 10
Dependent Claim
40 words
A device as claimed in claim 8, wherein said power jacks are hydraulically actuated and said frame has a front transverse member in the form of a cylinder to contain hydraulic fluid for the actuation of the said power jack.
Claim 11
Dependent Claim
56 words
A device as claimed in claim 7, wherein said means pivoting said chassis are double-acting power jacks each fixed at one end to said frame and at the other end to the rear end of said chassis and means, at the rear ends of said frame and chassis, to guide the vertical movement of the chassis.
Claim 12
Dependent Claim
40 words
A device as claimed in claim 10 wherein said power jacks are hydraulically actuated and said frame has a front transverse member in the form of a cylinder to contain hydraulic fluid for the actuation of the said power jack.
Claim 13
Dependent Claim
36 words
A device as claimed in claim 7, wherein said wheeled frame has a pair of pivotable rear wheels to control its direction of movement and means at the forward end for hook-up to a drawing vehicle.
Claim 14
Dependent Claim
39 words
A device as claimed in claim 12, including coupling bar means joining said rear wheels for synchronized pivoting movement and a power jack interconnecting said frame and coupling bar means to control the direction of movement of said frame.
Claim 15
Dependent Claim
40 words
A device as claimed in claim 13, wherein said power jack is hydraulically actuated and said frame has a front transverse member in the form of a cylinder to contain hydraulic fluid for the actuation of the said power jack.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |