US3920058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sawing logs
Assignee: Individual
•
Filing: 1973-06-12
•
Granted: 1975-11-18
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Expires: 1993-06-12
Abstract
Abstract Small logs of various diameter sizes are conveyed along a linear path of travel while two notches are chipped in the bottom of the log''s periphery. The log surfaces formed by the notches are planed to provide bearing surfaces for guiding the log. As the log continues along the linear path, it is sawed by planar saws into slabs having thicknesses corresponding to finished lumber strips or boards and dimensional lumber. The slabs are then sawed with planar edger saws to form finished strips, boards or dimensional lumber.
Inventors
- 👤 Willard H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:05
CPC Classifications
B; B27; B27B; B27B1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A method of sawing small logs of various diameter sizes into finished lumber comprising the steps of conveying each log along a linear path of travel, chipping two notches in the bottom of the log''s periphery to form two support surfaces thereon extending in the same substantially horizontal plane and two surfaces perpendicular to the support surfaces, planing the log surfaces formed by the two notches, employing the planed surfaces of the log at the notches as bearing surfaces to guide the log along the linear path of travel through the first subsequent sawing operation, sawing the log with planer saws on planes perpendicular to the substantially horizontal plane of the support surfaces to divide the log into a series of slabs with those slabs removed inwardly from the outermost slabs having thicknesses corresponding to finished lumber strips and the center slab having a thickness from which finished dimensional lumber can be cut, sawing the slabs with planer edger saws to form finished strips or boards, and sawing the center slab of the log with planer saws to form finished dimensional lumber.
Claim 2
Independent Claim
182 words
A method of sawing small logs of various diameter sizes into finished lumber comprising the steps of conveying each log along a linear path of travel, chipping two notches in the bottom of the log''s periphery to form two support surfaces thereon extending in the same substantially horizontal plane and two surfaces perpendicular to the support surfaces, planing the log surfaces formed by the two notches, employing the planed surfaces of the log at the notches as bearing surfaces to guide the log along the linear path of travel through the first subsequent sawing operation, sawing the log with planer saws on planes perpendicular to the substantially horizontal plane of the support surfaces to divide the log into a series of slabs with those slabs removed inwardly from the outermost slabs having thicknesses corresponding to finished lumber strips and the center slab having a thickness from which finished dimensional lumber can be cut, sawing the slabs with planer edger saws to form finished strips or boards, and sawing the center slab of the log with planer saws to form finished dimensional lumber.
Claim 3
Dependent Claim
76 words
The method set forth in claim 1, wherein said log is sawed with planer saws on planes perpendicular to the substantially horizontal plane of the support surfaces by removing pairs of slabs from opposite sides of the log and successively repeating the sawing operation as the log continues to move along the linear path of travel so that a succeeding sawing operation receives the central portion of the log passing through the immediately preceding sawing operation.
Claim 4
Dependent Claim
85 words
The method set forth in claim 1, wherein each log, regardless of diameter size, is sawed on the same planes perpendicular to the substantially horizontal plane of the support surfaces so that the interior slabs and center slab have uniform thicknesses but vary in width and number of slab sections in accordance with the diameter of the log sawed, and further including the step of manually directing the slabs to the appropriate planer edger saws for cutting the widest standard finished strip or board therefrom.
Claim 5
Dependent Claim
51 words
The method set forth in claim 1, wherein the center slab of the log has a thickness corresponding to the finished width of dimensional lumber, and further including the step of turning the center slab on its side before sawing with a gang of planer saws to form small dimensional lumber.
Claim 6
Dependent Claim
52 words
The method set forth in claim 1, wherein the center slab of the log has a thickness corresponding to the finished thickness of dimensional lumber, and further including the step of manually directing the center slab to the Appropriate planer edger saws for cutting the widest standard finished strip or board therefrom.
Claim 7
Dependent Claim
38 words
The method set forth in claim 1, wherein the center slab is cut from the log on planes perpendicular to the substantially horizontal plane of the support surfaces and coplaner with the two perpendicular surfaces at the notches.
Claim 8
Dependent Claim
63 words
The method set forth in claim 1, wherein the log is sawed on planes perpendicular to the substantially horizontal plane of the support surfaces by a first set of planer saws positioned over the log and cutting downwardly therein and then by a second set of planer saws positioned under the log and cutting upwardly therein to coincide with the downward saw cuts.
Claim 9
Independent Claim
81 words
A method of sawing small logs into finished lumber comprising the steps of forming from each log at least one slab having two parallel finished surfaces with a thickness between the finished surfaces corresponding to a thickness size of finished lumber, and sawing the slab longitudinally on planes perpendicular to the finished surfaces with a pair of parallel planer edger saws spaced a distance apart corresponding to the largest width size of finished lumber that can be cut from the slab.
Claim 10
Independent Claim
81 words
A method of sawing small logs into finished lumber comprising the steps of forming from each log at least one slab having two parallel finished surfaces with a thickness between the finished surfaces corresponding to a thickness size of finished lumber, and sawing the slab longitudinally on planes perpendicular to the finished surfaces with a pair of parallel planer edger saws spaced a distance apart corresponding to the largest width size of finished lumber that can be cut from the slab.
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |