Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1987-05-14
1988-07-12
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
138 97, 405156, F16L 100, F16L 5518
Patent
active
047566442
ABSTRACT:
An apparatus for rerounding flexible deflected pipe and having a housing of slightly smaller outside diameter than the inside diameter of a pipe to be rerounded. The apparatus includes a plurality of bearings in which a crankshaft is journalled. The crankshaft supports an eccentrically mounted weight for generating vibrations in the crankshaft when the crankshaft is rotated. An air motor drives the crankshaft. The crankshaft includes a central bore and radial passages for equalizing air pressure across the bearings. Flanges are secured in heat conducting relationship with both the bearings and with the housing to conduct heat away from the bearings, thereby cooling the bearings. One of the flanges includes apertures for conducting air which is expelled from the air motor, thereby cooling the flange and the bearings.
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