US3565143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain cutter for debranching and/or debarking trees
Assignee: ROTENBURGER METALLWERKE GmbH
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Filing: 1968-07-05
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Granted: 1971-02-23
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Expires: 1988-07-05
Abstract
Abstract A chain cutter for debranching and/or debarking trees in which the chain serves to carry cutter teeth and which lies, during operation, at least partly on the trunk being processed. A plurality of chain plates are mounted on the chain and provided with at least three differently shaped and ground cutter teeth. The teeth are arranged along the longitudinal axis of the chain in a repeating sequence of a spaced pair of teeth and a substantially centrally located single tooth. The spaced pair of teeth project outwardly beyond the sides of the chain.
Inventors
- 👤 Georg Wehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:54
CPC Classifications
B; B27; B27L; B27L1/00; B27L1/12; B27L1/127
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
A chain cutter for use in devices which debranch and/or debark trees, particularly conifers, in which said chain, during operation, lies at least partly against the trunk being processed comprising a plurality of connected link means forming said chain, a plurality of chain plates mounted on one side of said chain, a plurality of at least three types of cutter teeth each type being differently shaped and ground, said teeth being integral with said plates and forming a staggered repeating sequence along the longitudinal axis of said chain of a spaced pair of teeth and a substantially centrally located single tooth, said pair of teeth being an inner tooth and an outer tooth and having one tooth of each of two of said types and said single tooth being of the third type of teeth, the cutting edges of said inner teeth projecting beyond their associated chain plates towards the trunk and running approximately through the point of contact between the chain adjacent the cutting edge and the trunk.
Claim 2
Dependent Claim
169 words
A chain cutter for use in devices which debranch and/or debark trees, particularly conifers, in which said chain, during operation, lies at least partly against the trunk being processed comprising a plurality of connected link means forming said chain, a plurality of chain plates mounted on one side of said chain, a plurality of at least three types of cutter teeth each type being differently shaped and ground, said teeth being integral with said plates and forming a staggered repeating sequence along the longitudinal axis of said chain of a spaced pair of teeth and a substantially centrally located single tooth, said pair of teeth being an inner tooth and an outer tooth and having one tooth of each of two of said types and said single tooth being of the third type of teeth, the cutting edges of said inner teeth projecting beyond their associated chain plates towards the trunk and running approximately through the point of contact between the chain adjacent the cutting edge and the trunk.
Claim 3
Dependent Claim
21 words
A chain cutter according to claim 1, in which the central tooth is higher than the outer and the inner teeth.
Claim 4
Dependent Claim
171 words
A chain cutter according to claim 1, in which the teeth exhibit a side rake of about 15* and an upper clearance angle of about 10*; said central tooth being provided on Both sides with a clearance angle of about 5* from the cutting edge as seen towards the direction of travel; the outer tooth having, on the side remote from the trunk, a clearance angle of about 10* from the cutting edge to the base of the tooth and a clearance angle of about 5* from the cutting edge as seen towards the direction of travel; the inner tooth having, on the side facing the trunk, a clearance angle of about 5* from the cutting edge to the base of the tooth and a clearance angle of about 10* from the cutting edge, as seen towards the direction of travel; and the inner and outer teeth having, on the sides facing each other, clearance angles of about 2* 30'' from the cutting edge, as seen towards the direction of travel.
Claim 5
Dependent Claim
33 words
A chain cutter according to claim 1, in which the inner and outer teeth project by about 8.7 mm., and the central tooth projects by about 11.7 mm. from the relevant chain plates.
Claim 6
Dependent Claim
49 words
A chain cutter according to claim 1, in which the cutting edge of the inner tooth is about 4.5 mm. in length, the cutting edge of the outer tooth is about 5.5 mm. in length, and the cutting edge of the central tooth is about 8 mm. in length.
Claim 7
Dependent Claim
35 words
A chain cutter according to claim 1, further comprising outer chain plates arranged on the side of the chain remote from the teeth, said outer chain plates being provided with a central, outwardly projecting elevation.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |