Patent US3893635A successfully refreshed from Google Patents.
US3893635A
Expired / Lapsed
US
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Shredder structure
Assignee: Garbalizer Corp of America
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Filing: 1974-05-01
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Granted: 1975-07-08
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Expires: 1994-05-01
Abstract
Abstract An improved shredder construction including a revolving shaft and a series of blade assemblies mounted by their associated hubs to the shaft. The individual hubs or hub sections are keyed to the shaft, whereas the respective blade assemblies are pinned to their respective hubs or hub assemblies. In the invention the composite hub structure includes a series of hub sectors, generally two, which are bolted together at opposite sides. Cutter bar bases supporting cutter bars operatively associated with the blades are raised at their underneath dimension such that centrifugal force will cause debris hanging on to the blade assembly, exposed relative to the cutter bases, to be thrown outwardly and downwardly free of the equipment. Accordingly, the cutter bar structure including their bases are relieved such that the blades will be exposed proximate their lowermost peripheral trajectories of travel. Blades are likewise affixed to the lower edges of the cutter bar structure such that should there be any remaining debris clinging to the blade structure, the same will be simply brushed or sheared as the blade returns upwardly, relative to its outer extremity, into the region between adjacent cutter bars. Solely a scissor-shear action is employed at the upper and lower edges of the cutter bars.
Inventors
- 👤 John C Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:29
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/16; B02C18/18; B02C18/182; B02C18/184; B02C18/0084
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A shredder construction including, in combination, a revolving shaft, a series of interspaced cutter blades having respective shearing portions and keyed to said shaft for revolvement therewith about the shaft''s axis of revolvement, a series of mutually spaced, fixedly disposed cutter bars having opposite ends, said cutter bars having upper and lower edges and being cooperatively disposed in alignment between and positioned at least in part beneath the said axis of revolvement of said shaft, said cutter blades in their revolvement cyclically extending beneath said cutter bar lower edges, whereby debris as might tend to cling to said cutter blades will tend to be thrown off through centrifugal force, to deter re-entry of such debris upwardly between said cutter bars, said upper and lower edges of said cutter bars having respective shearing portions respectively disposed cooperatively with said cutter blade shearing portions and positioned for mutual angular disposition with respect to said cutter blade shearing portions, in acute-angle fashion when said cutter blades are coacting with said shearing portions of said cutter bars at times of the proximate shear-crossing of said cutter blade shearing portions with both of said cutter bar shearing portions of each of said cutter bars, to effect an angular, scissor-type shear, whereby to shear any remaining debris as might cling to said cutter blades as the same approaches said re-entry between said cutter bars.
Claim 2
Dependent Claim
228 words
A shredder construction including, in combination, a revolving shaft, a series of interspaced cutter blades having respective shearing portions and keyed to said shaft for revolvement therewith about the shaft''s axis of revolvement, a series of mutually spaced, fixedly disposed cutter bars having opposite ends, said cutter bars having upper and lower edges and being cooperatively disposed in alignment between and positioned at least in part beneath the said axis of revolvement of said shaft, said cutter blades in their revolvement cyclically extending beneath said cutter bar lower edges, whereby debris as might tend to cling to said cutter blades will tend to be thrown off through centrifugal force, to deter re-entry of such debris upwardly between said cutter bars, said upper and lower edges of said cutter bars having respective shearing portions respectively disposed cooperatively with said cutter blade shearing portions and positioned for mutual angular disposition with respect to said cutter blade shearing portions, in acute-angle fashion when said cutter blades are coacting with said shearing portions of said cutter bars at times of the proximate shear-crossing of said cutter blade shearing portions with both of said cutter bar shearing portions of each of said cutter bars, to effect an angular, scissor-type shear, whereby to shear any remaining debris as might cling to said cutter blades as the same approaches said re-entry between said cutter bars.
Claim 3
Dependent Claim
30 words
Structure according to claim 1 wherein said cutter blades include oppositely extending arms having respective, opposed, shearing edges configured for shear-scissor co-action with said shearing portions of said cutter bars.
Claim 4
Dependent Claim
32 words
Structure according to claim 1 wherein each of said shearing portions of said cutter blades and also said cutter bars comprise hardened segments fastened to said cutter blades and cutter bars respectively.
Claim 5
Dependent Claim
41 words
Structure according to claim 1 wherein said lower edges of said cutter bars are concave, facing downwardly, said ends of said cutter bars being thereby vertically enlarged to provide needed end support, said construction including support structure bolted to said ends.
Claim 6
Dependent Claim
33 words
Structure according to claim 1 wherein said shearing portions of said cutter bars proximate said lower edges thereof are mutually aligned and angulated relative to said shearing portions of said upper edges thereof.
Claim 7
Dependent Claim
29 words
Structure according to claim 5 wherein said opposite ends of said cutter bars are vertically enlarged and depending relative to said shearing portions of said cutter bar lower edges.
Claim 8
Dependent Claim
32 words
Structure according to claim 1 wherein said spaced cutter blades are mutually helically oriented, said shearing portions of said upper and lower edges of said cutter bars being in respective, planar alignment.
References Cited (Backward Citations)
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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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |