Patent US3661331A successfully refreshed from Google Patents.
US3661331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood chipper
Assignee: Individual
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Filing: 1969-09-08
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Granted: 1972-05-09
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Expires: 1989-09-08
Abstract
Abstract Wood chipper having a rotary disc with spirally mounted L-shaped wing knives to effectively sequentially slice the surface of the wood stock into a plurality of elongated segments which are automatically broken into chips, each segment being produced by cutting the wood surface simultaneously in multiple directions and at a predetermined depth. Thus, initial orientation of the bulk waste is unnecessary.
Inventors
- 👤 Earl Ballew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:54
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A wood chipper comprising: disc means, means for rotating said disc means, feed means for delivering wood stock towards said disc means transverse to the plane of rotation thereof; cutting means disposed on said disc means for simultaneously cutting the surface of said wood stock in multiple directions and at a predetermined depth, said disc means comprises a generally planar circular plate, and (wherein) said cutting means comprise a plurality of knives protruding from a planar surface of said plate, each knife having a first cutting edge generally extending parallel to said planar plate surface and an adjoining second cutting edge generally extending transverse to and towards said planar plate surface; and said knives being disposed about said plate surface at different radial distances from the rotational axis thereof.
Claim 2
Dependent Claim
129 words
A wood chipper comprising: disc means, means for rotating said disc means, feed means for delivering wood stock towards said disc means transverse to the plane of rotation thereof; cutting means disposed on said disc means for simultaneously cutting the surface of said wood stock in multiple directions and at a predetermined depth, said disc means comprises a generally planar circular plate, and (wherein) said cutting means comprise a plurality of knives protruding from a planar surface of said plate, each knife having a first cutting edge generally extending parallel to said planar plate surface and an adjoining second cutting edge generally extending transverse to and towards said planar plate surface; and said knives being disposed about said plate surface at different radial distances from the rotational axis thereof.
Claim 3
Dependent Claim
21 words
A wood chipper as defined in claim 1, wherein said knives are disposed about said plate surface in a spiral curve.
Claim 4
Dependent Claim
51 words
A wood chipper as defined in claim 2, wherein each knife protrudes from said planar surface of said plate the same distance, whereby said first cutting edges of said knives are all disposed in a single plane parallel to said plate surface, said distance of protrusion determining the depth of cut.
Claim 5
Dependent Claim
29 words
A wood chipper as defined in claim 3, wherein each knife in said spiral curve is disposed at a different radial distance from the rotational axis of said plate.
Claim 6
Dependent Claim
43 words
A wood chipper as defined in claim 4, wherein the difference in radial distances of disposition between adjacent knives in said spiral curve is such that said first cutting edge of said knives sweeps through overlapping cutting paths during rotation of said plate.
Claim 7
Dependent Claim
26 words
A wood chipper as defined in claim 5, wherein said first cutting edge of each knife is disposed at an angle to an associated plate radius.
Claim 8
Dependent Claim
97 words
A wood chipper as defined in claim 6, wherein each knife comprises an L-shaped wing knife, and wherein throughbores are provided through said plate along said spiral curve, holding means disposed in said throughbores for securing each knife in said plate at an adjustable distance of protrusion and at an angle from said planar surface thereof, a portion of each holding means defining a knife slot in communication with its associated plate throughbore, whereby chips of wood cut by each wing knife are carried through said slot and associated throughbore to the other side of said plate.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |