US4315818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-pollution equipment
Assignee: Vikoma International Ltd
•
Filing: 1980-05-21
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Granted: 1982-02-16
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Expires: 2000-05-21
Abstract
Abstract A device for picking up oil floating on the surface of water, particularly heavy fuel oil and weathered crude oil, which device comprises; (a) a first rotatable drum (2) having corrugations (3) extending across its surface; (b) a second, smaller rotatable drum (11) having corrugations (12) extending across its surface adapted to mesh with the corrugations (3) of the first drum (2); (c) means for driving one or other of the drums; (d) a collector for recovered oil (14) mounted below the area where the gear teeth mesh, and (e) at least one float so that in use the device floats with the first larger drum (2) partially immersed in water and the second smaller drum (11) and collector (14) clear of the water.
Inventors
- 👤 John L. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:27
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/103; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A device for removing oil floating on the surface of water which device comprises a frame, two rotatable drums, one of which is larger than the other, each drum having corrugations in the form of gear teeth extending across the surface of the drum, said corrugations being parallel to each other and to the axis of the drum and being adapted to mesh with the corrugations of the other drum, the device also comprising: (a) means for driving one of the drums; (b) a collector for recovered oil mounted below the area where the gear teeth of the two drums mesh during rotation thereof; and (c) at least one float so that in use the device floats with the larger drum partially immersed in water and with the smaller drum and collector clear of the water and with the plane joining the axis of rotation of the drums at an angle between the horizontal and the vertical.
Claim 2
Independent Claim
157 words
A device for removing oil floating on the surface of water which device comprises a frame, two rotatable drums, one of which is larger than the other, each drum having corrugations in the form of gear teeth extending across the surface of the drum, said corrugations being parallel to each other and to the axis of the drum and being adapted to mesh with the corrugations of the other drum, the device also comprising: (a) means for driving one of the drums; (b) a collector for recovered oil mounted below the area where the gear teeth of the two drums mesh during rotation thereof; and (c) at least one float so that in use the device floats with the larger drum partially immersed in water and with the smaller drum and collector clear of the water and with the plane joining the axis of rotation of the drums at an angle between the horizontal and the vertical.
Claim 3
Dependent Claim
17 words
A device according to claim 1 wherein the larger drum is hollow and acts as a float.
Claim 4
Dependent Claim
32 words
A device according to claim 1 in which the ratio of the diameter of the smaller drum to the diameter of the larger drum is in the range of 1:1.75 to 1:2.25.
Claim 5
Dependent Claim
30 words
A device according to claim 1 in which the plane joining the axes of rotation of the drums is at an angle with the horizontal of between 25° and 35°.
Claim 6
Dependent Claim
40 words
A device according to claim 1 in which the larger drum is mounted on a shaft between arms, which arms are mounted on the frame of the device and are biased to urge the larger drum against the smaller drum.
References Cited (Backward Citations)
US1860819A
Cited
US3702297A
Cited
US3700107A
Cited
US3968041A
Cited
US3685653A
Cited
FR2114382A5
Cited
JPS5233168A
Cited
WO1979001135A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |