US3680797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill
Assignee: Sprout Bauer Inc
•
Filing: 1969-11-28
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Granted: 1972-08-01
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Expires: 1989-11-28
Abstract
Abstract Various pieces of raw or scrap plastic, foods, pharmaceuticals, chemicals both dry and wet, materials are fed into the mill and reduced in size into particles in a size range of from 1 to 3 microns to larger micron sizes. The rotor has a plurality of rows of blades mounted thereon which serve to reduce the fed materials into the smaller sizes. The screen below the rotor permits the exiting of the desired sizes from the mill.
Inventors
- 👤 Gordon W Covey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:08
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/14; B02C18/148; B02C18/144; B02C23/00; B02C23/08; B02C23/16; B02C2023/165
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
226 words
A mill for granulating material comprising a housing having an inlet opening to receive the material and a discharge opening to discharge the material in a granulated size; a rotor rotatably mounted in said housing between said openings, said rotor having a pair of reduced diameter stub shaft ends journalling said rotor in said housing and an enlarged central portion having a plurality of circumferentially spaced slots therein; a plurality of knife bars, each of said knife bars being slidably mounted in a respective one of said slots; a plurality of blades mounted on and extending from each said knife bar in a plurality of peripherally spaced rows and in a staggered pattern with respect to each other about said rotor and extending radially outwardly from the outer periphery of said rotor a distance equal to from one-quarter to one-half the radius of said rotor for granulating the received material upon rotation of said rotor, said blades in each row being disposed in symmetrical relation about a central transverse plane of said rotor; means for releaseably locking said knife bars in said slots; and a screen mounted in said housing about the lower side of said rotor in spaced relation to said blades, said screen having a plurality of openings of predetermined size therein to permit passage of granulated material of at least said predetermined size.
Claim 2
Dependent Claim
226 words
A mill for granulating material comprising a housing having an inlet opening to receive the material and a discharge opening to discharge the material in a granulated size; a rotor rotatably mounted in said housing between said openings, said rotor having a pair of reduced diameter stub shaft ends journalling said rotor in said housing and an enlarged central portion having a plurality of circumferentially spaced slots therein; a plurality of knife bars, each of said knife bars being slidably mounted in a respective one of said slots; a plurality of blades mounted on and extending from each said knife bar in a plurality of peripherally spaced rows and in a staggered pattern with respect to each other about said rotor and extending radially outwardly from the outer periphery of said rotor a distance equal to from one-quarter to one-half the radius of said rotor for granulating the received material upon rotation of said rotor, said blades in each row being disposed in symmetrical relation about a central transverse plane of said rotor; means for releaseably locking said knife bars in said slots; and a screen mounted in said housing about the lower side of said rotor in spaced relation to said blades, said screen having a plurality of openings of predetermined size therein to permit passage of granulated material of at least said predetermined size.
Claim 3
Dependent Claim
36 words
A mill as set forth in claim 1 wherein said housing includes a frame portion supporting said rotor and said screen thereon and a cover mounted on said frame portion over said rotor and said screen.
Claim 4
Dependent Claim
26 words
A mill as set forth in claim 2 wherein said cover is pivotally mounted on said frame portion to pivot away from said rotor and screen.
Claim 5
Dependent Claim
54 words
A mill as set forth in claim 2 wherein said cover includes a pair of lips disposed on opposite sides, said lips projecting outwardly of said cover into the plane of said frame portion to grip two ends of said screen between said cover and said frame portion to prevent displacement of said screen.
Claim 6
Dependent Claim
28 words
A mill as set forth in claim 2 wherein said housing further includes a feed hopper mounted on said cover for directing the received material towards said rotor.
Claim 7
Dependent Claim
18 words
A mill as set forth in claim 5 wherein said feed hopper is removably mounted on said cover.
Claim 8
Dependent Claim
22 words
A mill as set forth in claim 1 which further comprises bearing means mounted on said housing rotatably mounting said rotor thereon.
Claim 9
Dependent Claim
25 words
A mill as set forth in claim 7 which further comprises oil mist lubrication means connected to said bearing means for lubricating said bearing means.
Claim 10
Dependent Claim
29 words
A mill as set forth in claim 7 which furTher comprises stuffing box seal on said rotor adjacent said housing for sealing said rotor with respect to said housing.
Claim 11
Dependent Claim
28 words
A mill as set forth in claim 1 which further comprises a mounting frame secured to said housing for mounting of said discharge opening over a predetermined space.
Claim 12
Dependent Claim
24 words
A mill as set forth in claim 1 wherein said screen has a plurality of openings therein of a size of about 15 microns.
Claim 13
Dependent Claim
24 words
A mill as set forth in claim 1 wherein said screen is substantially semi-circular and is spaced from the radial extent of said blades.
Claim 14
Dependent Claim
28 words
A mill as set forth in claim 1 wherein said blades on said knife bars are arranged in a predetermined pattern to obtain predetermined sizes of granulated particles.
Claim 15
Dependent Claim
15 words
A mill as set forth in claim 1 wherein each slot is of trapezoidal cross-section.
Claim 16
Dependent Claim
33 words
A mill as set forth in claim 1 which includes a plurality of knife shanks secured on each knife bar, each said shank having a respective one of said blades removably mounted thereon.
References Cited (Backward Citations)
US1160632A
Cited
US1457092A
Cited
US1890844A
Cited
US2385767A
Cited
US2440051A
Cited
US2785865A
Cited
US3170640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |