Method of and apparatus for cutting a pipe

Details Method of and apparatus for cutting a pipe Method of and apparatus for cutting a pipe

1990-10-31

1992-11-03

Watts, Douglas D.

Cutlery

Pipe and rod cutters

Adapted to cut pipe or rod longitudinally

30 96, B23D 2100

Patent

active

051597560

ABSTRACT:
Cutting apparatus is provided for cutting a hole or `window` in the wall of a pipe, for example prior to joining a branch pipe to a host pipe. The apparatus comprises a chassis frame 14 carrying a cutter unit 42 supporting a cutter tool 62. The chassis is attached to and movable around the pipe 12 by means of `roller` chains 24. The cutter unit is movable with respect to the chassis frame by means of the associated slider block 38 which is slidable along longitudinally extending chassis frame members 16. Thus, the cutter tool 62 can be moved relative to the workpiece in one sense by movement of the chassis frame 14 and in another sense by movement of the cutter tool relative to the chassis frame. A combination of such movements enable the hole or `window` to be cut.

REFERENCES:
patent: 4185525 (1980-01-01), Sherer
patent: 4359820 (1982-11-01), Wheeler
patent: 4411410 (1983-10-01), Sumner
patent: 4440383 (1984-04-01), Dearman
patent: 4490909 (1985-01-01), Wachs
patent: 4682919 (1987-07-01), Mitchell
patent: 5009007 (1991-04-01), Martin et al.
"Tool cuts a pipe window", On the Market, p. 25, Apr. 1988, Gas World, Reader Service No. 349.
"Axial Pipe Window Cutter for Steel Pipe without Damage to Inserted Plastic", Operating Section Proceedings 1971, American Gas Association, C. J. Rees, pp. D-121-D-123.

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