Patent US3780778A successfully refreshed from Google Patents.
US3780778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sawing and chipping machine
Assignee: KOCKUMS CANCAR Inc A CANADIAN CORP
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Filing: 1972-03-27
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Granted: 1973-12-25
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Expires: 1992-03-27
Abstract
Abstract A sawing and chipping machine for providing a sawn face on a log having a rotable head on which a circular saw and chipping knives are mounted for sawing a slab from a moving log and at the same time reducing the slab to chips suitable for pulping.
Inventors
- 👤 F Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:43
CPC Classifications
B; B27; B27B; B27B7/00; B27B33/00; B27B33/02; B27B33/08; B27B33/20; B27C; B27C1/00; B27C1/08; B27L; B27L11/00; B27L11/007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
A sawing and chipping machine including: a. means for feeding A log lengthwise through the machine, b. a driven head member rotatable about an axis perpendicular to the log, the head member having an inner face, c. a circular saw mounted on the inner face of the head member having teeth projecting outward of a periphery of the head for cutting a slab from the log as the log is fed through the machine, d. chipping knives mounted on the head member for progressively reducing the slab to chips as it is being cut from the log by the saw, the chipping knives being disposed so that their cutting edges project into the kerf cut by the saw and terminate short of the saw face confronting the log and extend outwards beyond the periphery of the head member so as to provide a chipped end face on the slab clear of the periphery of the member.
Claim 2
Dependent Claim
156 words
A sawing and chipping machine including: a. means for feeding A log lengthwise through the machine, b. a driven head member rotatable about an axis perpendicular to the log, the head member having an inner face, c. a circular saw mounted on the inner face of the head member having teeth projecting outward of a periphery of the head for cutting a slab from the log as the log is fed through the machine, d. chipping knives mounted on the head member for progressively reducing the slab to chips as it is being cut from the log by the saw, the chipping knives being disposed so that their cutting edges project into the kerf cut by the saw and terminate short of the saw face confronting the log and extend outwards beyond the periphery of the head member so as to provide a chipped end face on the slab clear of the periphery of the member.
Claim 3
Dependent Claim
49 words
A sawing and chipping machine as claimed in claim 1 in which the radius of each chipping knife is less than the radius of a saw tooth immediately preceding a distance such that a kerf bottom cut by the saw teeth precedes the chipped end face of the slab.
Claim 4
Dependent Claim
72 words
A sawing and chipping machine as claimed in claim 1 in which the saw has a tooth gap at each chipping knife greater in extent than one saw tooth and radius of the saw teeth increases uniformly and incrementally from the tooth immediately following a chipping knife to the tooth immediately preceding the next chipping knife so that extra cutting load occasioned by the tooth gap is distributed equally to each tooth.
Claim 5
Dependent Claim
105 words
A sawing and chipping machine as claimed in claim 1 in which the circular saw is segmented, having a segment extending between adjacent chipping knives, each segment being circumferentially spaced from an adjacent segment so as to present a tooth gap greater in extent than one tooth, each segment having a center of curvature offset eccentrically from the axis of rotation of the head a distance such that radius of the saw teeth of each segment increases incrementally from the lead tooth to the trailing tooth so that extra cutting load occasioned by the tooth gap is distributed equally to the teeth of each segment.
Claim 6
Dependent Claim
34 words
A sawing and chipping machine as claimed in claim 1 in which each saw tooth is chisel shaped having a transverse cutting edge and parallel side cutting edges for reducing kerf wood to chips.
Claim 7
Dependent Claim
70 words
A sawing and chipping machine as claimed in claim 1 in which the saw has a gullet between adjacent teeth, each gullet having a length in excess of maximum kerf depth so that the gullet bottoms open clear of the chipped end face of the slab, the gullet bottoms being outwardly bevelled so that wood cut by the saw is directed laterally outwards from the sawn surface of the log.
Claim 8
Dependent Claim
50 words
A sawing and chipping machine as claimed in claim 1 in which the saw has a substantially thick radial inner portion from which the saw teeth, thinner than said inner portion, radially project, the saw teeth and radial inner portion having inner log confronting faces extending in a common plane.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |