US3703947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal pipeline coating apparatus
Assignee: INT PIPELINE SERVICES Inc
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Filing: 1971-03-08
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Granted: 1972-11-28
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Expires: 1991-03-08
Abstract
Abstract A slug assembly for passage through a pipeline and to be controllably propelled through the pipeline as a sliding restrictive fluid by-pass piston therein in response to fluid being pumped through the pipeline. The slug assembly includes (1) pipeline interior surface engaging wheeled brake structure for controllably braking the speed of travel of the slug assembly through the pipeline, (2) storage tanks for treating liquids to be applied to the interior walls of the pipeline, (3) a wall friction driven pump assembly for pumping liquids from the tanks through a discharge line, (4) a wall friction driven liquid metering assembly for controllably metering the flow of liquid through the discharge line, and (5) a controlled fluid by-pass sliding piston assembly for developing a travel thrust on the slug assembly for movement of the latter through the pipeline in response to a differential between fluid pressures within the pipeline on opposite sides of the piston assembly, the fluid bypass portion of the piston assembly incorporating a fluid turbine structure driving a trailing rotary spray head to which the liquid discharge from the liquid metering assembly is supplied.
Inventors
- 👤 Ira T Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
F; F16; F16D; F16D57/00; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0551; F16L; F16L2101/00; F16L2101/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
A slug assembly for passage through a pipeline, said slug assembly including oppositely canted wheel assemblies for rolling contact with the interior surfaces of a pipeline and for rotation in opposite directions relative to each other in response to movement through the pipeline in the same direction, said slug assembly further including brake means including two relatively rotatable components to which said wheel assemblies are drivingly connected, said brake means including means for controllably braking said components relative to each other.
Claim 2
Dependent Claim
81 words
A slug assembly for passage through a pipeline, said slug assembly including oppositely canted wheel assemblies for rolling contact with the interior surfaces of a pipeline and for rotation in opposite directions relative to each other in response to movement through the pipeline in the same direction, said slug assembly further including brake means including two relatively rotatable components to which said wheel assemblies are drivingly connected, said brake means including means for controllably braking said components relative to each other.
Claim 3
Dependent Claim
102 words
A slug assembly for passage through a pipeline, said slug assembly including oppositely cantEd wheel assemblies for rolling contact with the interior surfaces of a pipeline and rotation in opposite directions relative to each other in response to movement through the pipeline in the same direction, said slug assembly further including a pair of first and second members rotatable relative to each other about an axis generally coinciding with the axis of rotation of said wheel assemblies when the latter are axially advanced in the same direction through a pipeline, said wheel assemblies being drivingly connected to said first and second members.
Claim 4
Dependent Claim
102 words
A slug assembly for passage through a pipeline, said slug assembly including oppositely cantEd wheel assemblies for rolling contact with the interior surfaces of a pipeline and rotation in opposite directions relative to each other in response to movement through the pipeline in the same direction, said slug assembly further including a pair of first and second members rotatable relative to each other about an axis generally coinciding with the axis of rotation of said wheel assemblies when the latter are axially advanced in the same direction through a pipeline, said wheel assemblies being drivingly connected to said first and second members.
Claim 5
Dependent Claim
22 words
The combination of claim 2, wherein said first and second members comprise the housing and input shaft portions of a hydraulic pump.
Claim 6
Dependent Claim
26 words
The combination of claim 3, wherein said hydraulic pump is incorporated in a closed hydraulic circuit and said pump includes a variouable restricted discharge control valve.
Claim 7
Dependent Claim
41 words
The combination of claim 1 wherein said wheel assemblies each includes a plurality of circumferentially and longitudinally spaced wheel components disposed radially outwardly of a center axis extending between said wheel assemblies and about which said wheel assemblies are relatively rotatable.
Claim 8
Dependent Claim
44 words
The combination of claim 5, wherein said wheel components of each of said wheel assemblies are supported therefrom for generally radial shifting relative to said center axis between inner and outer limit positions, and means yieldly biasing said wheel components toward said outer positions.
Claim 9
Dependent Claim
23 words
The combination of claim 1 wherein said two relatively rotatable components comprise the housing and input shaft portions of a hydraulic pump assembly.
Claim 10
Dependent Claim
22 words
The combination of claim 7, wherein said hydraulic pump assembly includes a closed hydraulic circuit and a variable restricted discharge control valve.
Claim 11
Dependent Claim
55 words
The combination of claim 1 wherein said slug assembly further includes a piston assembly for slidably engaging the interior wall surfaces of a pipeline so as to be propelled through the pipeline in response to fluid being pumped through said pipeline and the resultant differential in fluid pressures on opposite sides of said piston assembly.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |