US3882912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter for wood chipper having radially offset blades
Assignee: Hombak Maschinenfabrik KG
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Filing: 1973-08-24
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Granted: 1975-05-13
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Expires: 1993-08-24
Abstract
Abstract A cutter for a wood-chipping apparatus has a drum provided around its periphery with a plurality of blades. Straight-edged blades defining with the cutting edges on rotation of the arbor an inner orbit alternate with comb blades each having a plurality of in-line outer blade regions defining an orbit outside the inner orbit. Inclined intermediate flanks extend from the regions of the outer regions of the cutting edge of the comb blades at an angle of 45* to the outer orbit and cross the inner orbit. The arbor is formed ahead of the comb blades with a diameter that is greater than its diameter elsewhere by a distance equal to the radial spacing between the inner and outer orbits.
Inventors
- 👤 Hans Sybertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:53
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/005; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1952; Y10T407/1956; Y10T407/1962
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A cutter for a wood-chipping apparatus, said cutter comprising an arbor rotatable about an axis, at least one first blade secured to said arbor and having an edge projecting from said arbor and defining on rotation thereof an inner orbit, and at least one second blade secured to said arbor and having a plurality of axially spaced and aligned outer edges projecting from said arbor and defining on rotation thereof an outer orbit radially outside said inner orbit, said arbor having relative to the rotation direction thereof a diameter in front of said second blade equal to the diameter in back of the second blade plus the radial distance between said inner and outer orbits.
Claim 2
Dependent Claim
115 words
A cutter for a wood-chipping apparatus, said cutter comprising an arbor rotatable about an axis, at least one first blade secured to said arbor and having an edge projecting from said arbor and defining on rotation thereof an inner orbit, and at least one second blade secured to said arbor and having a plurality of axially spaced and aligned outer edges projecting from said arbor and defining on rotation thereof an outer orbit radially outside said inner orbit, said arbor having relative to the rotation direction thereof a diameter in front of said second blade equal to the diameter in back of the second blade plus the radial distance between said inner and outer orbits.
Claim 3
Dependent Claim
35 words
The cutter defined in claim 1 wherein said second blade is formed at each end of its edges with an inclined flank extending at an angle to said outer orbit and crossing said inner orbit.
Claim 4
Dependent Claim
21 words
The cutter defined in claim 2 wherein all of said edges are straight and extend parallel to generatrices of said arbor.
References Cited (Backward Citations)
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US2449605A
Cited
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Cited
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Cited
US3195594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |