US3845907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for comminuting trash
Assignee: Individual
•
Filing: 1973-10-01
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Granted: 1974-11-05
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Expires: 1993-10-01
Abstract
Abstract In apparatus for comminuting trash in which two parallel disposed shafts, one having a degree of axial play and the other substantially no axial play, a motor, reduction gearing disposed between the motor and shafts through which the motor drives the shafts, a reversing device for driving the motor in different directions and a plurality of groups of disc-shaped blades disposed at regular intervals on each shaft and arranged such that the groups on one shaft engage in the interstices between the groups on the other shaft are provided. The inner distance between two adjacent groups on the shaft having substantially no axial play is equal to the degree of play plus the width of the group on the shaft having a degree of play. Each blade has at least one step region including a tongue with the surfaces which define the tongue forming an opening angle of the order of magnitude of 30*. The step regions of the blades on each shaft are angularly offset with respect to one another.
Inventors
- 👤 W Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/14; B02C18/142
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
169 words
Apparatus for comminuting trash comprising: a. a motor; b. at least two parallel shafts driven at least indirectly by said motor; c. a plurality of disc-shaped blades disposed on each of said shafts and secured thereto for rotation therewith, each of said blades having at least one tongue extending into the direction of rotation and at least some of the blades on each of said shafts being spaced from adjacent blades on the same shaft, with the blades on one shaft extending into the spaces between blades on the opposite shaft; d. means for rotatably supporting one of said shafts so as to have at least a predetermined degree of axial play parallel to said shaft associated therewith; e. means for rotatably supporting the other of said shafts so as to have substantially no axial play associated therewith relative to the one shaft, and f. the blades on one shaft extending into said spaces on the other shaft with a clearance equal to said predetermined degree of axial play.
Claim 2
Dependent Claim
169 words
Apparatus for comminuting trash comprising: a. a motor; b. at least two parallel shafts driven at least indirectly by said motor; c. a plurality of disc-shaped blades disposed on each of said shafts and secured thereto for rotation therewith, each of said blades having at least one tongue extending into the direction of rotation and at least some of the blades on each of said shafts being spaced from adjacent blades on the same shaft, with the blades on one shaft extending into the spaces between blades on the opposite shaft; d. means for rotatably supporting one of said shafts so as to have at least a predetermined degree of axial play parallel to said shaft associated therewith; e. means for rotatably supporting the other of said shafts so as to have substantially no axial play associated therewith relative to the one shaft, and f. the blades on one shaft extending into said spaces on the other shaft with a clearance equal to said predetermined degree of axial play.
Claim 3
Dependent Claim
72 words
Apparatus for comminuting trash according to claim 1 in which said blades are disposed at regular intervals on each of said shafts in groups of at least two blades and arranged so that the blade groups on one shaft extend into the spaces between the blade groups of the other of said shafts and the tongues of the blades on each of said shafts being angularly offset with respect to each other.
Claim 4
Dependent Claim
33 words
Apparatus for comminuting trash according to claim 2 comprising a. means for reversing the rotation of both of said shafts; b. an inlet above said blades; and c. an outlet below said blades.
Claim 5
Dependent Claim
54 words
Apparatus for comminuting trash according to claim 2 in which the inner distance between two adjacent blade groups on the shaft having relatively no axial play associated therewith is equal to the degree of axial play plus the width of the blade group on the shaft having a degree of axial play associated therewith.
Claim 6
Dependent Claim
31 words
Apparatus for comminuting trash according to claim 2, in which the tongues of said blades on each of said shafts are helically offset with respect to each other along that shaft.
Claim 7
Dependent Claim
38 words
Apparatus according to claim 2 wherein the degree of axial play is approximately 0.2 mm and wherein a spacer sleeve is provided which is wider than any group of blades by the amount of said degree of play.
Claim 8
Dependent Claim
45 words
Apparatus for comminuting trash according to claim 1 in which the inner distance between adjacent spaced blades on the same shaft is equal to the degree of play plus the width of the blades on the other shaft extending into the space between said blAdes.
Claim 9
Dependent Claim
36 words
Apparatus according to claim 1 comprising means on the blades on the shaft having relatively no axial play associated therewith for guiding the blades on the other shaft parallel to the axis of said other shaft.
Claim 10
Dependent Claim
34 words
Apparatus according to claim 8 in which said blade means comprises flank portions on the blades on each shaft for engaging and defining an overlap portion with the adjacent blades on the other shaft.
Claim 11
Dependent Claim
32 words
Apparatus according to claim 1 comprising means on said blades for enabling the blades on one shaft to remain in cutting engagement with the blades on the other shaft beyond said tongue.
Claim 12
Dependent Claim
57 words
Apparatus according to claim 1 comprising means for limiting the force of engagement between the blades on the shaft having axial play associated therewith and adjacent blades on the shaft having relatively no axial play associated therewith, said engagement force limiting means comprising means for limiting the axial play on the shaft having axial play associated therewith.
Claim 13
Dependent Claim
31 words
Apparatus according to claim 11 comprising bearing means for supporting said shaft having axial play associated therewith and said limiting means comprises means for adjusting the position of said bearing means.
Claim 14
Dependent Claim
40 words
Apparatus according to claim 12 in which said means for adjusting said bearing means position comprises means axially disposed with respect to said shaft having axial play associated therewith for limiting the movement of said bearing means in one direction.
Claim 15
Dependent Claim
17 words
Apparatus as defined in claim 1, wherein said shafts have a center spacing of approximately 130 mm.
Claim 16
Dependent Claim
35 words
Apparatus as defined in claim 1, wherein said shafts have a hexagonal circumferential configuration, and have a width between parallel sides of 41 mm and consist of non-hardened chromium steel, preferably 12 percent chromium steel.
Claim 17
Dependent Claim
37 words
Apparatus as defined in claim 1 wherein each blade group comprises two blades which are arranged next to one another without spacings therebetween and whose step regions are offset with respect to one another, preferably by 180*.
Claim 18
Dependent Claim
23 words
Apparatus as defined in claim 1 wherein even groups of blades which are each substantially 15 mm wide are provided on each shaft.
Claim 19
Dependent Claim
20 words
Apparatus according to claim 1 wherein the degree of axial play is in the order of magnitude of 0.2 mm.
Claim 20
Dependent Claim
16 words
Apparatus according to claim 1 wherein the degree of axial play is up to 0.2 mm.
Claim 21
Dependent Claim
18 words
Apparatus as defined in claim 1, wherein the numbers of shaft revolutions have a ratio of approximately 40:70.
Claim 22
Dependent Claim
16 words
Apparatus as defined in claim 3, wherein the actuation of said reversing means is torque dependent.
Claim 23
Dependent Claim
102 words
Apparatus as defined in claim 1, wherein said shafts have comminuting lengths of approximately 40 cm and the gearing includes a worm meshing with a worm gear, the worm gear mounted on a shaft which has mounted thereon and secured against rotation relative thereto a smaller toothed wheel which meshes with a larger toothed wheel of the other shaft, and a second smaller toothed wheel being disposed on the other shaft and secured against rotation relative thereto which meshes with a second larger toothed wheel of said shaft, said worm being driven by a motor which is an approximately 7.5 HP motor.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |