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US 3,942,248 AGranted
Pipe cutting device
AssigneeDND Corporation
InventorsC. Richard Sherer, Russell M. Foyle
Life of this patent
Estimating the term…
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AssigneeDND Corporation
InventorsC. Richard Sherer, Russell M. Foyle
Estimating the term…
A pipe cutting device comprises a split frame which may be clamped around the circumference of a pipe (either inside or outside of the pipe). Floatingly or freely mounted on the rollers carried by the frame, to rotate about the pipe, is a ring gear having at least one arcuate arm mounted thereon to rotate with the gear as it turns around the pipe. At one end, the arm is pivotally mounted on the ring gear. At the other end, the arm is selectively biased toward the pipe by a compression spring or other suitable force. This way, a blade mounted on the arm may be driven into the pipe by a controlled amount. A gear train selectively raises or lowers the blade with respect to the surface of the pipe depending upon the position of a clutch arrangement. A special feature of the cutter is that it is easily adapted to cut from either the outside or the inside surface of a pipe.
A pipe cutting device comprising a frame which may be clamped around or inside a pipe, ring gear means freely mounted on said frame for rotating about said pipe, cutter means, means carried by said ring gear for selectively causing said cutter means to apply any suitable cutting force to said pipe responsive to a rotation of said ring gear relative to said pipe, means for driving said ring gear to cause said cutting force to girdle said pipe, means for advancing said cutter means into a deeper cutting relationship with said pipe, said advancing means comprising a wheel or roller riding on said pipe as said ring gear is driven, said wheel turning a train of gears for feeding said cutter means, and clutch means for selectively causing said feeding means to either raise or lower said cutting means.
A pipe cutting device comprising a frame having a groove on one end with roller bearings at the root of said groove, ring gear means mounted on said roller bearings in said groove, means comprising an arm carrying a cutting blade and a gear train driven by a register roller, said arm being pivotally attached at one end to said ring gear, means comprising said gear train mounted on the other end of said arm for applying any suitable predetermined cutting force to said pipe responsive to a rotation of said ring gear relative to said pipe with said roller riding on said pipe, and means for rotatably driving said ring gear to cause said gear trains to drive said blade into said pipe responsive to said roller.
Dependencies are inferred from the claim text.