Cutting appliance for large cylindraceous objects
AssigneeGeneral Electric Canada Inc.
InventorsEdward J. Schartinger, deceased, Terry Hunter
Life of this patent
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Abstract
An internally expanding cutting device is used for severing large cylindraceous objects in two. The device comprises a spider mechanism in which a series of radially extending arms are attached to a central hub. The spider is arranged to be mounted on a base member so that the spider mechanism is free to rotate. A series of self propelled cutting wheels are mounted on the arms of the spider to allow the cutter wheels to contact the interior wall of the cylinder to be cut. The cutting wheels are arranged to drive the spider in a rotational manner while the cutter wheels are progressively pushed outwardly to deepen the cut. Each wheel follows in the track of the previous cutter wheel until the cylinder is severed.
Claims14
Apparatus for producing a separation in the wall of a large cylindrical vessel by swaging a groove in said wall in a plane orthogonal to the axis of said vessel comprising:
- a support assembly for supporting said apparatus mounted at a predetermined location within said vessel,
- swaging wheel means mounted on said support assembly for rotation thereon wherein said swaging wheel means comprises a plurality of spaced swaging wheels mounted on a rotatable spider assembly in such a manner as to allow said swaging wheels to be pushed radially outwardly on spider assembly to contact said wall and swage a groove in said wall,
- drive means associated with said swaging wheels capable of producing bidirectional rotation of said swaging wheels to, drive said spider assembly in an oscillatory fashion within said vessel and sever said wall by swaging.
Apparatus as claimed in claim I wherein said drive means comprises a hydraulic motor.
Apparatus for the production of a progressive circular groove in the wall of a large cylindrical vessel, comprising:
- a platform assembly of a suitable shape to fit within said vessel,
- wall engaging means on said platform to contact said wall of said vessel to stabilize said platform in said vessel in a predetermined location,
- grooving means for ultimately severing the wall of said vessel comprising a plurality of driven swaging wheels having a wedge shaped cross section mounted about a central axis of a rotatable structure resting on said platform assembly and wherein said swaging wheels are movable outwardly in a radial direction in concert such that the swaging wheels are located at substantially the same radial distance from the central axis of said rotatable structure during a cutting operation,
- said swaging wheels producing rotation of said rotatable structure upon contact with said wall.
Apparatus for producing a severing cut by swaging a groove in a large cylindrical vessel comprising:
- circle cutting apparatus mounted in said vessel comprising a series of substantially evenly spaced driven swaging wheels mounted on rotatable apparatus for causing rotation of said rotatable apparatus inside said vessel during periods when said swaging wheels contact the wall of said vessel,
- said driven swaging wheels having drive means associated therewith comprising an electric motor coupled to speed reduction gear boxes which are coupled to each swaging wheel, hydraulic cylinder means mounted on said rotatable apparatus for forcing each swaging wheel radially outwardly to produce a cut by swaging a groove in said wall.
Dependencies are inferred from the claim text.