US3880361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for comminuting trash
Assignee: TECHNISCHES ENTWICKLUNGS BURO Ltd
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Filing: 1973-10-01
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Granted: 1975-04-29
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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
- 👤 Werner Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:24
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/16; B02C18/24; B02C18/14; B02C18/142; B02C18/18; B02C18/182; B02C2018/164
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
167 words
Apparatus for comminuting trash comprising: a. a motor: b. at least two parallel shafts; c. means for rotatably supporting said shafts; d. gearing connected between said motor and said shafts for rotating said shafts in opposite directions and at different speeds with respect to one another; e. means for reversing the rotation of both of said shafts; f. a plurality of solid disc-shaped blades disposed on each of said shafts and secured thereto for rotation therewith, at least some of the blades one 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 other shaft; g. the peripheral contour of each of said blades comprising a cutting tongue portion extending in the direction of rotation and proceeding in the opposite direction in a continuous, smooth, inward, spiral curvature to a step region, said step region comprising a sickle-shaped recess portion receding from a cutting tongue portion to said spiral curvature.
Claim 2
Dependent Claim
167 words
Apparatus for comminuting trash comprising: a. a motor: b. at least two parallel shafts; c. means for rotatably supporting said shafts; d. gearing connected between said motor and said shafts for rotating said shafts in opposite directions and at different speeds with respect to one another; e. means for reversing the rotation of both of said shafts; f. a plurality of solid disc-shaped blades disposed on each of said shafts and secured thereto for rotation therewith, at least some of the blades one 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 other shaft; g. the peripheral contour of each of said blades comprising a cutting tongue portion extending in the direction of rotation and proceeding in the opposite direction in a continuous, smooth, inward, spiral curvature to a step region, said step region comprising a sickle-shaped recess portion receding from a cutting tongue portion to said spiral curvature.
Claim 3
Dependent Claim
34 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% chromiun steel.
Claim 4
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 5
Dependent Claim
23 words
Apparatus as defined in claim 1 wherein seven groups of blades which are each substantially 15 mm wide are provided on each shaft.
Claim 6
Dependent Claim
27 words
Apparatus as defined in claim 1 wherein the peripheral contour forms a triangle, and wherein there are three regions including recesses forming the sides of said triangle.
Claim 7
Dependent Claim
17 words
Apparatus as defined in claim 5, wherein the triangle has side surfaces which substantially form circular arcs.
Claim 8
Dependent Claim
20 words
Apparatus as defined in claim 1, wherein the tongue of said step region has an opening angle of substantially 30*.
Claim 9
Dependent Claim
23 words
Apparatus as defined in claim 1, wherein the tongue of said step region has an opening angle of 30* + or - 3*.
Claim 10
Dependent Claim
23 words
Apparatus as defined in claim 1, wherein the tongue of said step region has an opening angle of 30* + or - 6*.
Claim 11
Dependent Claim
28 words
Apparatus as defined in claim 1 wherein a portion of the sickle-shaped step region has a cutting edge, while the remaining portion of the peripheral contour does not.
Claim 12
Dependent Claim
30 words
Apparatus as defined in claim 1, wherein the blades consist of an oil-hardened approximately 12% chromium steel with the material number 2090 and with a Rockwell hardness of approximately 60.
Claim 13
Dependent Claim
18 words
Apparatus as defined in claim 1 wherein the actuation of said means for reversing rotation is time dependent.
Claim 14
Dependent Claim
24 words
An apparatus according to claim 1 wherein each of said plurality of blades has at least one further cutting tongue portion and step region.
Claim 15
Dependent Claim
17 words
An apparatus according to claim 1 wherein said step region recedes substantially below said smooth spiral curvature.
Claim 16
Dependent Claim
29 words
An apparatus according to claim 1 wherein said sickle-shaped recess is shaped to accommodate the necks of bottles, with a radius in the order of magnitude of 15 mm.
Claim 17
Dependent Claim
24 words
An apparatus according to claim 1 wherein said plurality of blades has a Rockwell hardness of between 60-62 and consists of 12% chromium steel.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |