US4078591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for chopping forest and bog stumps and snags in field
Assignee: KOMMANDITTIYHTIO ORASVUON KONEPAJA
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Filing: 1976-05-25
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Granted: 1978-03-14
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Expires: 1996-05-25
Abstract
Abstract Apparatus for use in economically profitable chopping of forest and bog stumps and of snags into transportable form in field conditions during all seasons. Chopping is effected by applying pressure which breaks the wood material charge that has been brought in one way or another into the space defined by a main blade and intermediate blades and by a backing plane and bottom. The stumps and snags in arbitrary positions are placed in such position with reference to the blades in connection with the pressing motion that the part of the wood material charge that has been cut off by the blades is able to evade the wedging pressure exerted by the sides of the blades, by sliding into a space which is more free, suffering rupture in the direction of the grain and being urged in chopped condition through the part constituted by the blades into the opening space.
Inventors
- 👤 Urho Syrjala
- 👤 Olavi Orasvuo
- 👤 Erkki Orasvuo
- 👤 Reijo Sakki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:13
CPC Classifications
A; A01; A01G; A01G3/00; A01G3/002; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
An apparatus for chopping forest and bog stumps and snags under field conditions, said apparatus comprising a frame defining a chopping space within said frame, a generally vertical wall bounding one side of said chopping space and a cavity below said wall, chopping means reciprocably movable back and forth in said space in a direction perpendicular to said vertical wall, said chopping means comprising a generally horizontal main blade, at least two intermediate spaced blades extending downwardly from said main blade and inclined with regard to each other so that the space between the intermediate blades widens in a downwards direction, and a bottom member secured to said blades and extending mainly between said blades and said vertical wall when the chopping means is in a rearward position, said bottom member moving into said cavity below said vertical wall during forward motion of said chopping means, and means for supporting the chopping means and for effecting its reciprocating motion.
Claim 2
Independent Claim
159 words
An apparatus for chopping forest and bog stumps and snags under field conditions, said apparatus comprising a frame defining a chopping space within said frame, a generally vertical wall bounding one side of said chopping space and a cavity below said wall, chopping means reciprocably movable back and forth in said space in a direction perpendicular to said vertical wall, said chopping means comprising a generally horizontal main blade, at least two intermediate spaced blades extending downwardly from said main blade and inclined with regard to each other so that the space between the intermediate blades widens in a downwards direction, and a bottom member secured to said blades and extending mainly between said blades and said vertical wall when the chopping means is in a rearward position, said bottom member moving into said cavity below said vertical wall during forward motion of said chopping means, and means for supporting the chopping means and for effecting its reciprocating motion.
Claim 3
Dependent Claim
22 words
Apparatus as claimed in claim 1 comprising inlet means for feeding material to be chopped into said chopping space by gravitational deposit.
Claim 4
Dependent Claim
41 words
Apparatus as claimed in claim 2 including a serrated edge on said vertical wall extending into said chopping space and proximate said inlet means to prevent reverse flow of material to the inlet means during forward travel of the chopping means.
Claim 5
Dependent Claim
25 words
Apparatus as claimed in claim 1 wherein said frame has a receiving chamber behind said intermediate blades and below the level of said main blade.
Claim 6
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein said means supporting the chopping means comprises rollers.
Claim 7
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein said main blade has an upper beveled edge.
Claim 8
Dependent Claim
14 words
Apparatus as claimed in claim 1 comprising means supporting said frame for travel thereof.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |