Patent US3572594A successfully refreshed from Google Patents.
US3572594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood comminuting apparatus
Assignee: Kershaw Manufacturing Co Inc
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Filing: 1969-02-18
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Granted: 1971-03-30
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Expires: 1989-02-18
Abstract
Abstract Wood comminuting apparatus having adjacent discs rotatable in opposite directions in a housing with blades at one side of one disc positioned to contact a length of wood fed sidewise thereagainst. Openings adjacent blades on the one disc convey cut wood therethrough to adjacent side of other disc. Other disc rotates at greater speed than the one disc and in opposite direction. Cutters on other disc comminute wood which then passes through openings in other disc. Impellers at other side of the other disc discharge comminuted wood from housing.
Inventors
- 👤 Royce G Kershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:05
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
232 words
In apparatus for comminuting a length of wood with the grain thereof extending lengthwise: a. a housing; b. a first disc mounted for rotation within said housing; c. means to rotate said first disc in one direction; d. angularly spaced blades at one side of said first disc; e. means to feed a length of wood sidewise toward said one side of said first disc into contact with said blades so that said blades move generally parallel to the grain of said length of wood; f. angularly spaced passageways through said first disc adjacent said blades for conveying pieces of wood cut by said blades through said first disc to the other side thereof; g. a second disc mounted for rotation within said housing adjacent said other side of said first disc; h. means to rotate said second disc in a direction opposite the direction of rotation of said first disc and at a speed greater than the speed of rotation of said first disc; i. angularly spaced cutters carried by the side of said second disc adjacent said first disc disposed to comminute said pieces of wood which pass through said first disc; j. angularly spaced passageways through said second disc adjacent said cutters for conveying the wood comminuted by said cutters through said second disc to the other side thereof; and k. means discharging the comminuted wood from said housing.
Claim 2
Dependent Claim
232 words
In apparatus for comminuting a length of wood with the grain thereof extending lengthwise: a. a housing; b. a first disc mounted for rotation within said housing; c. means to rotate said first disc in one direction; d. angularly spaced blades at one side of said first disc; e. means to feed a length of wood sidewise toward said one side of said first disc into contact with said blades so that said blades move generally parallel to the grain of said length of wood; f. angularly spaced passageways through said first disc adjacent said blades for conveying pieces of wood cut by said blades through said first disc to the other side thereof; g. a second disc mounted for rotation within said housing adjacent said other side of said first disc; h. means to rotate said second disc in a direction opposite the direction of rotation of said first disc and at a speed greater than the speed of rotation of said first disc; i. angularly spaced cutters carried by the side of said second disc adjacent said first disc disposed to comminute said pieces of wood which pass through said first disc; j. angularly spaced passageways through said second disc adjacent said cutters for conveying the wood comminuted by said cutters through said second disc to the other side thereof; and k. means discharging the comminuted wood from said housing.
Claim 3
Dependent Claim
45 words
Apparatus for comminuting a length of wood as defined in claim 1 in which angularly spaced impeller blades are mounted on said other side of said second disc to rotate within and circulate air through said housing so that the comminuted wood is discharged therefrom.
Claim 4
Dependent Claim
36 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said second disc is adapted to be rotated at a speed substantially three times the speed of rotation of said first disc.
Claim 5
Dependent Claim
43 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said first disc is adapted to be rotated at substantially 200 revolutions per minute and said second disc is adapted to be rotated at substantially 600 revolutions per minute.
Claim 6
Dependent Claim
32 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said blades carried by said first disc flare outwardly from the edge thereof to present a cutting edge.
Claim 7
Dependent Claim
33 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said cutters carried by said second disc are blunt so that they hammer and pulverize said pieces of wood.
Claim 8
Dependent Claim
47 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said housing is provided with a wall in spaced relation to said other side of said second disc to define a plenum chamber therebetween and a tangential outlet communicates with said plenum chamber.
Claim 9
Dependent Claim
36 words
Apparatus for comminuting a length of wood as defined in claim 1 in which said first disc and said second disc are mounted on concentric shaft members which rotate in opposite directions relative to each other.
Claim 10
Dependent Claim
44 words
Apparatus for comminuting a length of wood as defined in claim 1 in which the means to feed a length of wood sidewise toward said one side of said first disc comprises a feed chute which is generally rectangular as viewed in cross section.
Claim 11
Dependent Claim
30 words
Apparatus for comminuting a length of wood as defined in claim 9 in which said feed chute is located below the axis of rotation of said first and second discs.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |