Patent US3662964A successfully refreshed from Google Patents.
US3662964A
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US
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Comminuting machine
Assignee: BOHMTER MASCHF
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Filing: 1970-12-02
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Granted: 1972-05-16
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Expires: 1990-12-02
Abstract
Abstract A comminuting machine for metallic, plastic, vitreous, textile, ligneous or other scrap has a pair of horizontal shafts mounted in a housing below a material-admitting inlet and carrying stacks of ring-shaped frustoconical comminuting members provided with alternating tooth spaces and teeth which entrain and fragmentize the material during passage between the shafts. The larger diameter ends of the comminuting members have polished end faces surrounded by cutting edges, and the comminuting members of one of the stacks are inverted with reference to comminuting members of the other stack. The cutting edges of comminuting members of one of the stacks slightly overlap the cutting edges on comminuting members of the other stack. The teeth of comminuting members in each stack form one or more helices. The shafts are driven at the same speed but in opposite directions so as to rotate the comminuting members from above through and below the space between the shafts. The comminuted material passes through the slots of a removable grate which is secured to the housing below the shafts.
Inventors
- 👤 Kurt Rossler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:55
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/14; B02C18/142; B02C18/0084
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
161 words
A comminuting machine, particularly for fragmentizing scrap consisting of metallic, plastic, ligneous, vitreous and/or textile material, comprising a housing having material-admitting inlet means; a pair of at least substantially parallel shafts rotatable in said housing; stacks of annular comminuting members secured to said shafts, each comminuting member having a plane end face closely adjacent to the end face of a member of the other stack and at least substantially normal to the axis of the respective shaft, a cutting edge surrounding the end face, at least one substantially radially outwardly extending projection and at least one substantially radially inwardly extending recess, the cutting edge of each member of one of said stacks partially overlapping the cutting edge of a member of the other stack; and drive means for rotating said shafts in opposite directions so that the material which is admitted by way of said inlet means and enters the range of said projections is comminuted during passage between said shafts.
Claim 2
Dependent Claim
161 words
A comminuting machine, particularly for fragmentizing scrap consisting of metallic, plastic, ligneous, vitreous and/or textile material, comprising a housing having material-admitting inlet means; a pair of at least substantially parallel shafts rotatable in said housing; stacks of annular comminuting members secured to said shafts, each comminuting member having a plane end face closely adjacent to the end face of a member of the other stack and at least substantially normal to the axis of the respective shaft, a cutting edge surrounding the end face, at least one substantially radially outwardly extending projection and at least one substantially radially inwardly extending recess, the cutting edge of each member of one of said stacks partially overlapping the cutting edge of a member of the other stack; and drive means for rotating said shafts in opposite directions so that the material which is admitted by way of said inlet means and enters the range of said projections is comminuted during passage between said shafts.
Claim 3
Dependent Claim
20 words
A machine as defined in claim 1, wherein said drive means is arranged to rotate said shafts at identical speeds.
Claim 4
Dependent Claim
28 words
A machine as defined in claim 1, wherein the comminuting members of one of said stacks are inverted with reference to the comminuting members of the other stack.
Claim 5
Dependent Claim
27 words
A machine as defined in claim 1, wherein each comminuting member comprises a single projection and a single recess each extending along an arc of about 180*.
Claim 6
Dependent Claim
37 words
A machine as defined in claim 1, wherein each comminuting member comprises a plurality of equidistant projections and a plurality of recesses which alternate with said projections, as considered in the circumferential direction of the respective shaft.
Claim 7
Dependent Claim
33 words
A machine as defined in claim 1, wherein each of said comminuting members has a peripheral surface which tapers axially of the respective shaft in a direction away from the respective end face.
Claim 8
Dependent Claim
47 words
A machine as defined in claim 1, wherein each of said cutting edges comprises an arcuate portion provided on the respective projection and an arcuate portion in the respective recess, the radii of curvature of such arcuate portions being located on the axes of the respective shafts.
Claim 9
Dependent Claim
38 words
A machine as defined in claim 1, wherein the projections of at least some comminuting members in each of said stacks are angularly offset with reference to each other so that such projections form at least one helix.
Claim 10
Dependent Claim
63 words
A machine as defined in claim 1, wherein each comminuting member comprises a second end face which is at least substantially parallel to the first mentioned end face, one end face of each comminuting member having at least one socket and the other end face of each comminuting member having at least one protuberance received in the socket of the adjoining comminuting member.
Claim 11
Dependent Claim
30 words
A machine as defined in claim 9, wherein said protuberances are of conical shape and said sockets are angularly offset with reference to the protuberances of the respective comminuting members.
Claim 12
Dependent Claim
33 words
A machine as defined in claim 1, further comprIsing feeding means for urging the material which is admitted by way of said inlet means into the range of projections on said comminuting members.
Claim 13
Dependent Claim
53 words
A machine as defined in claim 11, wherein said feeding means comprises an elongated pusher extending lengthwise of said shafts and actuating means for imparting to said pusher recurrent movements in a direction to advance the material which is admitted by way of said inlet means toward the projections of said comminuting members.
Claim 14
Dependent Claim
75 words
A machine as defined in claim 12, wherein said pusher is pivotable about a predetermined axis which is parallel to the axes of said shafts and said actuating means comprises a lever rigid with said pusher and pivotable about said predetermined axis, and transmission means for oscillating said lever, said lever being arranged to oscillate said pusher to and from an end position in which the pusher is at least partially withdrawn from said housing.
Claim 15
Dependent Claim
23 words
A machine as defined in claim 13, wherein said transmission means comprises an eccentric and resilient means coupling said eccentric with said lever.
Claim 16
Dependent Claim
17 words
A machine as defined in claim 14, wherein said eccentric derives motion from one of said shafts.
Claim 17
Dependent Claim
48 words
A machine as defined in claim 15, wherein said one shaft has a pinion and said eccentric comprises an internal gear meshing with said pinion, said transmission means further comprising a distancing member concentrically mounted in said eccentric for maintaining said internal gear in mesh with said pinion.
Claim 18
Dependent Claim
22 words
A machine as defined in claim 16, wherein said transmission means further comprises a variable-length rod connecting said eccentric with said lever.
Claim 19
Dependent Claim
23 words
A machine as defined in claim 17, wherein said transmission means further comprises spring means tending to increase the length of said rod.
Claim 20
Dependent Claim
23 words
A machine as defined in claim 18, wherein said resilient means comprises at least one prestressed spring connecting said eccentric with said lever.
Claim 21
Dependent Claim
25 words
A machine as defined in claim 1, wherein said shafts are substantially horizontal and further comprising a grate secured to said housing below said shafts.
Claim 22
Dependent Claim
43 words
A machine as defined in claim 20, wherein one of said shafts is located at a level below the other shaft, said grate being of arcuate shape with a center of curvature located at least close to the axis of said one shaft.
Claim 23
Dependent Claim
26 words
A machine as defined in claim 21, wherein said grate is provided with slots whose width increases in the direction of rotation of said one shaft.
Claim 24
Dependent Claim
17 words
A machine as defined in claim 20, wherein said grate comprises outturned flanges secured to said housing.
Claim 25
Dependent Claim
18 words
A machine as defined in claim 20, further comprising means for separably connecting said grate to said housing.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |