US3965620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum polishing apparatus
Assignee: DR ING MANFRID DREHER KG
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Filing: 1974-08-08
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Granted: 1976-06-29
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Expires: 1994-08-08
Abstract
Abstract Drum polishing and tumbling apparatus having a cylindrical casing rotated about its central axis. A screw conveyor is located within the casing substantially from one end to the other. The screw conveyor is rotated about its axis relative to the casing. The screw conveyor extends radially outward into proximity to the surface of the inner wall of the casing. Seal means is provided if desired between the blade of the screw conveyor and the surface of the casing. The screw conveyor is journaled in bearings located in the end walls of the cylinder and is independently and selectively rotated.
Inventors
- 👤 Manfrid Dreher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:31
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/02; B24B31/03
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
Drum apparatus for the mechanical surface treatment of particulate material by a suitable media comrpising a cylindrical casing adapted to be rotated about its central axis, an inlet at one end for the supply of media and material and an outlet at the other end for the removal of said media and material, a screw conveyor located within said casing adapted to be rotated relative to said casing to move said media and material, said screw conveyor extending substantially the length of said casing and radially outward into proximity with the surface of the inner wall of said casing and comprising an axle and a spiral blade integrally formed therewith, said axle being journalled in bearings located at each end of said casing comprising a central hub surrounding said axle and support means extending radially outward in connection with said casing, said support means having an opening therein adapted to align with said inlet and outlet means on rotation of said casing, and means for variably rotating each of said casing and screw conveyor independently of the other, to obtain selectively variable relative speed therebetween.
Claim 2
Dependent Claim
185 words
Drum apparatus for the mechanical surface treatment of particulate material by a suitable media comrpising a cylindrical casing adapted to be rotated about its central axis, an inlet at one end for the supply of media and material and an outlet at the other end for the removal of said media and material, a screw conveyor located within said casing adapted to be rotated relative to said casing to move said media and material, said screw conveyor extending substantially the length of said casing and radially outward into proximity with the surface of the inner wall of said casing and comprising an axle and a spiral blade integrally formed therewith, said axle being journalled in bearings located at each end of said casing comprising a central hub surrounding said axle and support means extending radially outward in connection with said casing, said support means having an opening therein adapted to align with said inlet and outlet means on rotation of said casing, and means for variably rotating each of said casing and screw conveyor independently of the other, to obtain selectively variable relative speed therebetween.
Claim 3
Dependent Claim
39 words
The apparatus according to claim 1 including a base, roller means journaled on said base and spaced from each other to externally support said rollers and means for driving at least one of said rollers to rotate said casing.
Claim 4
Dependent Claim
26 words
The apparatus according to claim 1 wherein the surface of the inner wall of said casing is coated with a layer of an elastically resilient material.
Claim 5
Dependent Claim
13 words
The apparatus according to claim 3 wherein said elastically resilient material is rubber.
Claim 6
Dependent Claim
31 words
The apparatus according to claim 1 wherein the bearings for said screw conveyor comprise a central hub and a plurality of spokes extending radially outward from said bearing to said casing.
Claim 7
Dependent Claim
23 words
The apparatus according to claim 1 wherein said means for rotating each of said casing and screw comprises a variable speed reversible motor.
Claim 8
Dependent Claim
23 words
The apparatus according to claim 6 wherein said motor is connected to said axle for driving said screw conveyor independently of said casing.
Claim 9
Dependent Claim
35 words
The apparatus according to claim 1 including motor means for driving each of said casing and screw conveyor and transmission means for varying speed, direction and interval of rotation of each relative to the other.
Claim 10
Dependent Claim
34 words
The apparatus according to claim 1 including at least one flexible sealing lip secured to the peripheral edge of said screw conveyor and slidably engaging the surface of the inner wall of said casing.
Claim 11
Dependent Claim
39 words
The apparatus according to claim 9 wherein the seal means comprise a pair of elongated flexible strips defining with the peripheral edge and the surface of the inner wall a continuous chamber for retention of a sliding agent therein.
Claim 12
Dependent Claim
13 words
The apparatus according to claim 10 wherein the sliding agent is a lubricant.
Claim 13
Dependent Claim
13 words
The apparatus according to claim 10 wherein the sliding agent is a soap.
Claim 14
Dependent Claim
13 words
The apparatus according to claim 10 wherein said flexible strips are elastically resilient.
Claim 15
Dependent Claim
12 words
The apparatus according to claim 13 wherein said elastic strips are rubber.
Claim 16
Dependent Claim
23 words
The apparatus according to claim 9 wherein the surface of the inner wall is coated with a layer of an elastically resilient material.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |