Patent US1792415A successfully refreshed from Google Patents.
US3874604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatuses for disintegration of straw and similar material
Assignee: GRONBERGS GJUTERI OCH KVARNFABRIK REKORDVERKEN OTTUM AB
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Filing: 1973-11-08
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Granted: 1975-04-01
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Expires: 1993-11-08
Abstract
Abstract A cutting apparatus comprising a rotor on which are mounted discs rotating with the rotor shaft and provided at their periphery with at least one shaft each, said shafts extending in parallel with the rotor shaft and supporting at each end a cutting knife which upon rotation of the rotor pivots in a plane transverse to the axis of said rotor, means being provided on said rotor shaft for enabling the discs mounted thereon to be drawn together axially with the disc hubs arranged end to end in such a manner that said discs will be positioned at a torsional angle relative to one another and the rotor knives be located along a helical line about said rotor.
Inventors
- 👤 Sven D Gronberg
- 👤 Henry Alf Bertil Gronberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:55
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/14; A; A01; A01F; A01F12/00; A01F12/40; A01F29/00; A01F29/02; A01F29/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
251 words
Apparatus for disintegrating straw or like material comprising in combination: a casing having an upper opening for receiving material to be disintegrated and a lower opening for discharging disintegrated material; a row of laterally spaced knives mounted in said casing; a rotor assembly journalled in spaced parallelism to said row of knives within said casing, said rotor assembly comprising a rotor shaft, a plurality of discs each having a hub portion and a peripheral portion, the hub portions being hollow and slidably engaged on said rotor shaft and tightening means on at least one end of said rotor shaft for tensioning the rotor shaft and compressing said hub portions to integrate said rotor shaft and discs as a single rotatable unit in which said discs are aligned opposite individual knives of said row of knives, at least one pair of rotor knives disposed in straddling relation to the peripheral portion of each disc so as to extend therefrom and pass in straddling relation to that knife of said row of knives with which the corresponding disc is aligned and mounting means for rotatably and detachably securing one end of each knife of each pair to the corresponding disc, and means interlocking adjacent hub portions of said discs so that the pairs of rotor knives thereof are circumferentially staggered whereby to provide clearance to allow removal and replacement of individual rotor knives while said rotor shaft and discs remain integrated as said single rotatable unit; and means for rotating said rotor assembly.
Claim 2
Dependent Claim
251 words
Apparatus for disintegrating straw or like material comprising in combination: a casing having an upper opening for receiving material to be disintegrated and a lower opening for discharging disintegrated material; a row of laterally spaced knives mounted in said casing; a rotor assembly journalled in spaced parallelism to said row of knives within said casing, said rotor assembly comprising a rotor shaft, a plurality of discs each having a hub portion and a peripheral portion, the hub portions being hollow and slidably engaged on said rotor shaft and tightening means on at least one end of said rotor shaft for tensioning the rotor shaft and compressing said hub portions to integrate said rotor shaft and discs as a single rotatable unit in which said discs are aligned opposite individual knives of said row of knives, at least one pair of rotor knives disposed in straddling relation to the peripheral portion of each disc so as to extend therefrom and pass in straddling relation to that knife of said row of knives with which the corresponding disc is aligned and mounting means for rotatably and detachably securing one end of each knife of each pair to the corresponding disc, and means interlocking adjacent hub portions of said discs so that the pairs of rotor knives thereof are circumferentially staggered whereby to provide clearance to allow removal and replacement of individual rotor knives while said rotor shaft and discs remain integrated as said single rotatable unit; and means for rotating said rotor assembly.
Claim 3
Dependent Claim
30 words
An apparatus in accordance with claim 1, wherein said means interlocking are cylindrical pins extending in parallel with said rotor shaft and engaging in end faces of said hub portions.
Claim 4
Dependent Claim
29 words
Apparatus as defined in claim 1 wherein said means interlocking adjacent hub portions effects a circumferential angular displacement of 90* between the pairs of rotor knives of adjacent discs.
Claim 5
Dependent Claim
68 words
Apparatus as defined in claim 1 wherein said mounting means comprises, for each disc, a disc shaft rotatably carried by the peripheral portion of each disc and having opposite end portions projecting therebeyond, the rotor knives of each pair being engaged on the opposite ends of a corresponding disc shaft and securing nut engaged on each end of each disc shaft to secure said rotor knives in place.
Claim 6
Dependent Claim
29 words
Apparatus as defined in claim 4 wherein said means interlocking adjacent hub portions effects a circumferential angular displacement of 90* between the pairs of rotor knives of adjacent 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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |