Turning – Severing or cut-off – Infeed means
Patent
1986-03-21
1988-10-25
Schran, Donald R.
Turning
Severing or cut-off
Infeed means
30103, 83 54, 83185, 83187, 82 12, B23D 2114
Patent
active
047794968
ABSTRACT:
An improved tube cutting apparatus and method for cutting through the inside of a metallic tube is disclosed herein. The apparatus generally comprises a support assembly which is slidably insertable within a tube, a flail tube cutting head connected to a short flexible shaft, and a linking shaft rotatably mounted within the support assembly for connecting the short flexible shaft of the cutting head to a longer flexible drive shaft. The center portion of the housing includes a mandrel circumscribed by a selectively expandable resilient bladder for temporarily affixing the support assembly to the inner wall of the tube in order to position the circular blade of the cutting head adjacent to a desired point along the longitudinal axis of the tube. The proximal and distal portions of the linking shaft include coupling assemblies for facilitating blade changes. In order to confine the cutting action of the blade on the cutting head to a thin circle around the inner wall of the tube, the support assembly also includes a thrust bearing that prevents the blade from moving longitudinally during the cutting operation.
REFERENCES:
patent: 2942092 (1960-06-01), Cammann
patent: 3859877 (1975-01-01), Sherer et al.
patent: 4434815 (1984-03-01), Flaherty et al.
patent: 4601223 (1986-07-01), Choby
Candee Clark B.
Evans David M.
Schran Donald R.
Westinghouse Electric Corp.
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