Patent US3797060A successfully refreshed from Google Patents.
US3797060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled machine for cleaning external surfaces of pipelines
Assignee: Individual
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Filing: 1972-03-22
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Granted: 1974-03-19
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Expires: 1992-03-22
Abstract
Abstract A self-propelled machine for cleaning external surfaces of pipelines in which the rotor encompassing the pipeline carries cleaning tools rotating together with the rotor and about their own axes parallel to the axis of rotation of the rotor, the tools being kinematically connected with the common drive of the machine through the drive of the rotor and, in addition, having a self-contained kinematic coupling with this drive adapted for changing the speed of rotation of the cleaning tools about their axes at a constant speed of the rotor.
Inventors
- 👤 L Doktorov
- 👤 V Salukvadze
- 👤 I Koshman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:17
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/36; B24B5/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
285 words
A self-propelled machine for cleaning external surfaces of pipelines having a common drive and comprising: a frame means; carriages mounted on said frame means and kinematically coupled with said common drive so as to move said carriages along the external surfaces of a pipeline to be cleaned; a rotor rotatably surrounding said pipeline and carrying rotatable cleaning tools operatively associated therewith,said rotor being mounted on said frame means and provided with an independent drive means for transmitting a driving torque from said common drive of the machine, said cleaning tools having their axes of rotation parallel to the axis of rotation of said rotor; means for providing an elastic contact between said cleaning tools and said external surface of said pipeline, said means being mounted on said rotor adjacent said tools; a central cogwheel rotatably mounted on said frame means coaxially with said rotor to rotate relative thereto; sprockets of said machine having their axes parallel to the rotational axis of said rotor, said sprockets being mounted on said rotor so as to operatively engage said cogwheel; a cardan joint for providing kinematic connection of each of said sprockets with a corresponding one of said cleaning tools through said independent rotor drive means so that during rotation of said rotor and said cogwheel said sprockets and said cleaning tools rotate around their own axes at identical rotational speeds, said central cogwheel having means for independent kinematic coupling thereof with said common drive of the machine for changing the speed of said cogwheel relative to the rotational speed of said rotor so that the rotational speed of said cleaning tools and said sprockets about their axes changes while the rotational speed of said rotor remains constant.
Claim 2
Dependent Claim
285 words
A self-propelled machine for cleaning external surfaces of pipelines having a common drive and comprising: a frame means; carriages mounted on said frame means and kinematically coupled with said common drive so as to move said carriages along the external surfaces of a pipeline to be cleaned; a rotor rotatably surrounding said pipeline and carrying rotatable cleaning tools operatively associated therewith,said rotor being mounted on said frame means and provided with an independent drive means for transmitting a driving torque from said common drive of the machine, said cleaning tools having their axes of rotation parallel to the axis of rotation of said rotor; means for providing an elastic contact between said cleaning tools and said external surface of said pipeline, said means being mounted on said rotor adjacent said tools; a central cogwheel rotatably mounted on said frame means coaxially with said rotor to rotate relative thereto; sprockets of said machine having their axes parallel to the rotational axis of said rotor, said sprockets being mounted on said rotor so as to operatively engage said cogwheel; a cardan joint for providing kinematic connection of each of said sprockets with a corresponding one of said cleaning tools through said independent rotor drive means so that during rotation of said rotor and said cogwheel said sprockets and said cleaning tools rotate around their own axes at identical rotational speeds, said central cogwheel having means for independent kinematic coupling thereof with said common drive of the machine for changing the speed of said cogwheel relative to the rotational speed of said rotor so that the rotational speed of said cleaning tools and said sprockets about their axes changes while the rotational speed of said rotor remains constant.
Claim 3
Dependent Claim
103 words
A machine as claimed in claim 1, wherein said means for independent kinematic coupling of said central cogwheel with the common drive of the machine is effected through a chain drive having a driven and a driving sprocket and wherein said common drive comprises an engine with a power-take-off reduction gear having at least one output shaft, said driven sprocket of said chain drive being rigidly secured on said central cogwheel, and said driving sprocket being secured to the output shaft of a gear box whose input shaft is connected through a clutch to one oF said output shafts of said reduction gear.
Claim 4
Dependent Claim
117 words
A machine as claimed in claim 1, in which the cleaning tools are made in the form of rotary cutting tools having radially arranged lengths of wire some ends of which are connected to one another while the other opposite ends remain free, the lateral surfaces of said lengths being pressed against one another in the immediate vicinity of said ends, while the opposite free ends of said wire lengths adjoin the common cutting face of the tool to form a surface of revolution, so that the ratio of the sum of the area of the face planes of the free ends to the total area of the cutting face of the tool is equal to 0.2-0.9.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |