US3645308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log-levelling machines
Assignee: Individual
•
Filing: 1969-12-19
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Granted: 1972-02-29
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Expires: 1989-12-19
Abstract
Abstract A log-levelling machine having at least one rotary cutter in the shape of a conical disc and a device for advancing logs in their longitudinal direction toward the rotary cutter or cutters. The machine operates to flatten the logs on their lateral sides by cutting the excess material into chips. According to the invention, that portion of each rotary cutter which is located next to the flattened surface of a log which is being cut is provided with a set of teeth adapted to cut chips of substantially smaller thickness than the chips cut by the remaining teeth of the cutter.
Inventors
- 👤 Philip Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:33
CPC Classifications
B; B27; B27B; B27B33/00; B27B33/20; B27L; B27L11/00; B27L11/007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
In a log-levelling machine including (a) at least one rotary carrier in the shape of a conical disc having first cutter means arranged on the conical surface of the disc, and (b) means for advancing logs in their longitudinal direction to place a lateral side thereof in contact with said at least one rotary carrier thereby to make the log flat on said lateral side by cutting the excess material on said lateral side into chips, the improvement wherein a portion of said at least one carrier which is located next to the flattened surface of a log is provided with second cutter means for cutting chips substantially smaller than the chips cut by said first cutter means, said second cutter means including a plurality of cutters arranged in a circular row, each of said cutters having a main edge disposed on a common plane and extending in the same plane as the grain of the log at the point of contact with the log and having an edge adjoining the main edge extending in a plane intersecting the grain.
Claim 2
Dependent Claim
180 words
In a log-levelling machine including (a) at least one rotary carrier in the shape of a conical disc having first cutter means arranged on the conical surface of the disc, and (b) means for advancing logs in their longitudinal direction to place a lateral side thereof in contact with said at least one rotary carrier thereby to make the log flat on said lateral side by cutting the excess material on said lateral side into chips, the improvement wherein a portion of said at least one carrier which is located next to the flattened surface of a log is provided with second cutter means for cutting chips substantially smaller than the chips cut by said first cutter means, said second cutter means including a plurality of cutters arranged in a circular row, each of said cutters having a main edge disposed on a common plane and extending in the same plane as the grain of the log at the point of contact with the log and having an edge adjoining the main edge extending in a plane intersecting the grain.
Claim 3
Dependent Claim
159 words
In a log-levelling machine including (a) at least one rotary carrier in the shape of a conical disc having first cutter means arranged on the conical surface of the disc, and (b) means for advancing logs in their longitudinal direction to place a lateral side thereof in contact with said at least one rotary carrier thereby to make the log flat on said lateral side by cutting the excess material on said lateral side into chips, the improvement wherein a portion of said at least one carrier which is located next to the flattened surface to a log is provided with second cutter means for cutting chips substantially smaller than the chips cut by said first cutter means, said second cutter means including a plurality of cutters and holder means, to which each of said cutters is secured, and which is disengagably secured to the central portion of said rotary carrier, whereby said second cutter means is readily replaceable.
Claim 4
Dependent Claim
159 words
In a log-levelling machine including (a) at least one rotary carrier in the shape of a conical disc having first cutter means arranged on the conical surface of the disc, and (b) means for advancing logs in their longitudinal direction to place a lateral side thereof in contact with said at least one rotary carrier thereby to make the log flat on said lateral side by cutting the excess material on said lateral side into chips, the improvement wherein a portion of said at least one carrier which is located next to the flattened surface to a log is provided with second cutter means for cutting chips substantially smaller than the chips cut by said first cutter means, said second cutter means including a plurality of cutters and holder means, to which each of said cutters is secured, and which is disengagably secured to the central portion of said rotary carrier, whereby said second cutter means is readily replaceable.
Claim 5
Dependent Claim
14 words
The improvement defined in claim 2, wherein said holder means is an annular disc.
Claim 6
Dependent Claim
22 words
The improvement defined in claim 3, wherein the surface of said annular disc facing the log has annular ribs with intermediate grooves.
Claim 7
Dependent Claim
75 words
The improvement defined in claim 4, wherein said log-levelling machine includes two rotary carriers arranged in opposite relationship; wherein said log-advancing means is adapted To advance logs in their longitudinal direction between said opposite rotary carriers and wherein said annular ribs and grooves on said the two annular discs of said two rotary carriers are staggered such that the ribs of one of said discs are located axially opposite the grooves of the other disc.
Claim 8
Dependent Claim
14 words
The improvement defined in clam 5, wherein said two rotary carriers are driven synchronously.
Claim 9
Dependent Claim
14 words
The improvement defined in clam 5, wherein said two rotary carriers are driven synchronously.
Claim 10
Dependent Claim
41 words
The improvement defined in claim 6, wherein the cutters of one of said discs are circumferentially staggered in relation to the cutters of the other disc so that the discs may be brought tightly together without the cutters forming an obstacle.
References Cited (Backward Citations)
US3190326A
Cited
US3330315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |