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US 4,484,559 AGranted
Apparatus for removing material such as concrete from underwater pipelines
AssigneeMcDermott Incorporated
InventorsBilly R. Ledford, Alan J. Hartt
Life of this patent
Estimating the term…
Abstract
Apparatus for removing covering material from underwater pipelines. A frame of the apparatus is clampingly engaged to the pipeline. A plurality of pipeline material cutters are cantileverly supported beyond the clamp to provide a plurality of cutting passes simultaneously and away from the points of attachment of the apparatus to a pipeline.
Claims10
Apparatus for removing covering material from underwater pipelines, the apparatus comprising
- a. a frame;
- b. means for clamping said frame to a material covered underwater pipeline;
- c. at least one member having an arcuate surface for positioning a plurality of cutting means in spaced relation circumferentially about the material covered pipeline;
- d. carriage means attached to said frame for effecting movement of said member in a direction along the pipeline with said arcuate surface adjacent the pipeline covering material;
- and
- e. a plurality of cutting means attached to said member and spaced apart in a direction of curvature of said arcuate surface for cutting the pipeline covering material at a plurality of points spaced-apart circumferentially of the pipeline simultaneously, said carriage means including at least one guide member rigidly attached to said frame and extending beyond said clamp means to act as a cantilever for support of said cutting means away from the points of attachment of the apparatus to a pipeline.
3 more elements
Apparatus for removing covering material from underwater pipelines, the apparatus comprising:
- a. a frame;
- b. means for clamping said frame to a material covered underwater pipeline;
- c. at least one cutting means;
- and
- d. carriage means attached to said frame for effecting movement of said cutting means in a direction along the pipeline for cutting of pipeline covering material, said carriage means including at least one guide member rigidly attached to said frame and extending beyond said clamp means to act as a cantilever for support of said cutting means away from the points of attachment of the apparatus to a pipeline.
2 more elements
Dependencies are inferred from the claim text.