Patent US5082036A successfully refreshed from Google Patents.
US5082036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forest harvester
Assignee: Timberjack AB
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Filing: 1989-06-20
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Granted: 1992-01-21
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Expires: 2009-06-20
Abstract
Abstract The invention concerns a forest harvester suspended pivotally at the end of a crane jib (1) and rotatable around its shaft of suspension for felling of a tree trunk and for trimming and possible cutting-off of the tree trunk in the horizontal position. The harvester comprises a suspension arm (3) shaped substantially as an inverted L and a processor unit (4) mounted pivotally at the lower end of the arm, the side of the processor unit (4) placed facing away from the suspension arm (3) being provided with a cross-cutting member (6), with two groups of trimming members (7,8) placed at a distance from one another, and with at least two drive rolls (9, 10) jointly operative with each other, with variable mutual spacing, and mounted between said groups of trimming members. The harvester is characterized by in that the felling movement of the processor unit (4) is arranged to take place towards the side in a vertical plane so that the shafts (9a, 10a) of the drive rolls maintain their substantially horizontal positions all the time.
Inventors
- 👤 Pentti Vierikko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:55
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/083
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A forest harvester for felling of a tree trunk and for trimming and cutting-off of the tree trunk in a horizontal position, said forest harvester being suspended pivotally at the end of a crane jib and rotatable around a shaft of suspension, and comprising: a suspension arm shaped substantially as an inverted L and a processor unit mounted pivotally around a pivot shaft at a lower end of said suspension arm, said pivot shaft being directed towards the processor unit, said processor unit having a front side facing away from the suspension arm and being provided with a cross-cutting member, two groups of trimming members placed at a distance from one another on said processor unit, at least two drive rolls jointly operative with each other, with variable mutual spacing, and mounted between said groups of trimming members, a felling movement of the processor unit arranged about said pivot shaft of the processor unit such that the drive rolls maintain their substantially horizontal position.
Claim 2
Dependent Claim
164 words
A forest harvester for felling of a tree trunk and for trimming and cutting-off of the tree trunk in a horizontal position, said forest harvester being suspended pivotally at the end of a crane jib and rotatable around a shaft of suspension, and comprising: a suspension arm shaped substantially as an inverted L and a processor unit mounted pivotally around a pivot shaft at a lower end of said suspension arm, said pivot shaft being directed towards the processor unit, said processor unit having a front side facing away from the suspension arm and being provided with a cross-cutting member, two groups of trimming members placed at a distance from one another on said processor unit, at least two drive rolls jointly operative with each other, with variable mutual spacing, and mounted between said groups of trimming members, a felling movement of the processor unit arranged about said pivot shaft of the processor unit such that the drive rolls maintain their substantially horizontal position.
Claim 3
Dependent Claim
25 words
Harvester as claimed in claim 1, wherein the harvester is provided with two drive rolls arranged to rest against a tree trunk from opposite sides.
Claim 4
Dependent Claim
21 words
Harvester as claimed in claim 2, wherein the drive rolls are driven by hydraulic motors connected in series with one another.
Claim 5
Dependent Claim
48 words
Harvester as claimed in claim 3, wherein a lower of the drive rolls, in the horizontal position of the processor unit, is stationarily mounted on the processor unit and the upper of the drive rolls is mounted on an arm pivotable by means of a hydraulic cylinder-piston device.
Claim 6
Dependent Claim
87 words
Harvester as claimed in claim 1, further comprising two stationarily mounted drive rolls positioned one after the other on the processor unit and arranged to rest against a side of the tree trunk, which is in the felling movement of the processor unit, a further drive roll arranged to rest against another side of the tree trunk at a level between contact points of the two stationary mounted drive rolls, said further drive roll being mounted on an arm pivotable by means of a hydraulic cylinder-piston device.
Claim 7
Dependent Claim
68 words
Harvester as claimed in claim 5, wherein: the drive rolls are driven by hydraulic motors, a hydraulic motor of the drive roll mounted on the pivot arm and connected in series with a hydraulic motor of the other stationary drive roll connected in parallel with the hydraulic motors of the other two drive rolls, the two stationary drive rolls being coupled together by means of an endless chain.
Claim 8
Dependent Claim
55 words
Harvester as claimed in claim 4, wherein: the pivot shaft of the processor unit is mounted on said processor unit in such a way that, at the starting position of the processor unit, a small acute angle is formed between a vertical part of the suspension arm and a main axis of the processor unit.
Claim 9
Dependent Claim
31 words
Harvester as claimed in claim 7, wherein: the felling movement of the harvester is produced by means of a hydraulic cylinder-piston device coupled between the processor unit and the suspension arm.
Claim 10
Dependent Claim
43 words
Harvester as claimed in claim 8, further comprising: a felling flap movable by means of a hydraulic cylinder-piston device and pivotally mounted around a shaft fitted at a bottom side of the processor unit, said shaft being substantially parallel to the drive rolls.
Claim 11
Dependent Claim
23 words
Harvester as claimed in claim 8, wherein: the processor unit is provided with a measuring device for setting of a desired cutting length.
Claim 12
Dependent Claim
21 words
Harvester as claimed in claim 10, further comprising: a hydraulic rotator effecting the rotation of the harvester around its suspension shaft.
Claim 13
Dependent Claim
24 words
Harvester as claim in claim 11, further comprising: a hydraulic tilting cylinder-piston device adjusting an angle between the crane jib and the suspension arm.
Claim 14
Dependent Claim
121 words
A forest harvester comprising: a processor unit having a cross-cutting member; a first group of trimming members mounted on said processor unit; a second group of trimming members mounted on said processor unit at a spaced location from said first group of trimming members; first and second drive rolls mounted on said processor unit between said first and said second group of trimming members; and suspension arm means connected to said processor unit for suspending said processor unit in a starting position, said starting position having said first and second rolls in a substantially horizontal position, said suspension arm means also suspending said processor unit in a trimming position with said first and said second rolls in a substantially horizontal position.
Claim 15
Dependent Claim
121 words
A forest harvester comprising: a processor unit having a cross-cutting member; a first group of trimming members mounted on said processor unit; a second group of trimming members mounted on said processor unit at a spaced location from said first group of trimming members; first and second drive rolls mounted on said processor unit between said first and said second group of trimming members; and suspension arm means connected to said processor unit for suspending said processor unit in a starting position, said starting position having said first and second rolls in a substantially horizontal position, said suspension arm means also suspending said processor unit in a trimming position with said first and said second rolls in a substantially horizontal position.
References Cited (Backward Citations)
US4552191A
Cited
US4881582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |