Patent US3905558A successfully refreshed from Google Patents.
US3905558A
Expired / Lapsed
US
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Wood chipper
Assignee: KOCKUMS CANCAR CORP KING STREET AND COCHRAN AVE TALLADEGA AL A CORP OF
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Filing: 1974-03-25
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Granted: 1975-09-16
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Expires: 1994-03-25
Abstract
Abstract A wood chipper having a rotating cutting wheel with radially extending knives mounted on the face of the wheel for cutting chips from lengths of wood with guide means attached to the wheel and forming a radial passage for receiving the chips and providing a smooth continuous flow-directing passage for the chips to the periphery of the wheel to minimize impact damage to the chips and the production of fines.
Inventors
- 👤 W Maynard Gaitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:46
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
221 words
A wood chipper comprising: a. a rotating cutting wheel having a front and rear face and a plurality of elongated and generally radially extending knives mounted on the front face of the wheel; b. a housing surrounding said wheel and having inlet means for feeding lengths of wood against the face of the wheel to cut chips from the wood and outlet means for discharging chips from the housing; c. elongated apertures in the front face of the cutting wheel extending along in front of the cutting edge of each of said knives so that the chips cut from the wood will pass through the apertures toward the rear of the cutting wheel; and d. guide means covering the discharge side of each aperture and opening toward the periphery of the cutting wheel for receiving the chips passing through the apertures and directing them in a generally radial direction toward the periphery of the cutting wheel, said guide means having an inner curved surface with the inner surface of the trailing portion of the guide means being generally in alignment with the cutting edge of the knife so that the chips will be supported and will slide along one continuous smooth surface until they are discharged from the periphery of the cutting wheel to thereby minimize impact damage to the chips.
Claim 2
Dependent Claim
221 words
A wood chipper comprising: a. a rotating cutting wheel having a front and rear face and a plurality of elongated and generally radially extending knives mounted on the front face of the wheel; b. a housing surrounding said wheel and having inlet means for feeding lengths of wood against the face of the wheel to cut chips from the wood and outlet means for discharging chips from the housing; c. elongated apertures in the front face of the cutting wheel extending along in front of the cutting edge of each of said knives so that the chips cut from the wood will pass through the apertures toward the rear of the cutting wheel; and d. guide means covering the discharge side of each aperture and opening toward the periphery of the cutting wheel for receiving the chips passing through the apertures and directing them in a generally radial direction toward the periphery of the cutting wheel, said guide means having an inner curved surface with the inner surface of the trailing portion of the guide means being generally in alignment with the cutting edge of the knife so that the chips will be supported and will slide along one continuous smooth surface until they are discharged from the periphery of the cutting wheel to thereby minimize impact damage to the chips.
Claim 3
Dependent Claim
72 words
The chipper of claim 1, wherein the wheel consists of a solid disc and includes elongated slots in the disc communicating said elongated apertures in the front face of the disc with the rear face of the disc, the trailing wall of said slots being aligned with the cutting edge of the knife and the trailing portion of the inner surface of the guide means with the trailing wall of the slot.
Claim 4
Dependent Claim
43 words
The chipper of claim 2, wherein the trailing wall of the slot diverges rearwardly from the cutting edge of the knife to the trailing wall of the chute so that the slot enlarges from the front to the rear face of the disc.
Claim 5
Dependent Claim
31 words
The chipper of claim 2, in which said guide means comprises a chute having a semi-circular inner surface mounted to the rear face of the disc over each of said slots.
Claim 6
Dependent Claim
30 words
The chipper of claim 4, wherein the inner surface of the chutes diverge outwardly toward the periphery of the disc and swirl the chips as they flow through the chutes.
Claim 7
Dependent Claim
40 words
The chipper of claim 5, whereIn the inner surface of the chutes is semi-cone shaped, the apex of the cone being located adjacent the inner end of the slots and the open base portion adjacent the periphery of the disc.
Claim 8
Dependent Claim
24 words
The chipper of claim 4, wherein the outer peripheral end of the chute conforms to, and is contiguous with, the periphery of the disc.
Claim 9
Dependent Claim
22 words
The chipper of claim 4, wherein the chute has an exterior fin to increase the flow of revolving air in the housing.
Claim 10
Dependent Claim
32 words
The chipper of claim 1, wherein the periphery of the wheel is circular and the housing is closely spaced from, and is of similar configuration to, the periphery of the cutting wheel.
Claim 11
Dependent Claim
36 words
The chipper of claim 1, wherein the inlet means comprises a chute inclined and offset with respect to the axis of the cutting wheel and having an end terminating adjacent the front face of the wheel.
Claim 12
Dependent Claim
43 words
The chipper of claim 1, wherein the outlet means comprises a chute extending tangentially outward from the housing with respect to the path of rotation of the cutting wheel and spaced around the wheel in its direction of rotation from the inlet means.
Claim 13
Dependent Claim
25 words
The chipper of claim 1, wherein the guide means comprises a radially extending channel located between the front and rear face of the cutting wheel.
Claim 14
Dependent Claim
32 words
The chipper of claim 12, wherein the channels have an inner, circular surface, the inner surface of the trailing portion of the channel being aligned with the cutting edge of the knife.
Claim 15
Dependent Claim
54 words
The chipper of claim 13, wherein the cutting wheel consists of spaced front and rear discs, the inner surface of the channels extending rearwardly from the knife edge around and in front of the rear disc to the back of the front disc at a point adjacent the leading edge of the elongated aperture.
Claim 16
Dependent Claim
28 words
The chipper of claim 14, wherein the channels are contained in a plurality of spaced web members connecting the front and rear discs and located adjacent the apertures.
Claim 17
Dependent Claim
37 words
The chipper of claim 15, wherein the web members comprise a single block having formed therein the channels for receiving the chips passing through the apertures and for discharging them at the periphery of the cutting wheel.
Claim 18
Dependent Claim
18 words
The chipper of claim 15, wherein the apertures and knives extend to the periphery of the cutting wheel.
Claim 19
Dependent Claim
41 words
The chipper of claim 17, wherein the front disc of the cutting wheel comprises a plurality of pie-shaped plates mounted in spaced relation to the rear disc, the trailing edge of each plate forming the leading edge of each elongated aperture.
Claim 20
Dependent Claim
33 words
The chipper of claim 17, wherein the periphery of the wheel is circular and the outer peripheral end of the web members and knives conforms with the circular periphery of the cutting wheel.
Claim 21
Dependent Claim
25 words
The chipper of claim 19, wherein the housing is closely spaced from, and is of similar circular configuration to, the periphery of the cutting wheel.
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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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |