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US 3,958,329 AGranted
Cast iron pipe cutter
OwnerPhilip W. Mundyinventor
Life of this patent
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Abstract
A tool for cutting cast-iron pipe is disclosed which includes inner and outer rings disposed annularly with respect to each other, a plurality of spring biased cutting pins reciprocally disposed in the inner ring, a plurality of cams disposed around the inner periphery of the outer ring and a motor mechanism for driving the rings relative to each other.
Claims10
In apparatus for cutting pipe, the combination comprising:
- an inner ring having a plurality of spring-biased cutting pins disposed radially around it's perimeter in spoke-like relationship so as to form an aperture at their cutting tips adapted to accommodate the outer wall of the pipe to be cut, each of said cutting pins adapted to reciprocate in said inner ring and including a cutting tip, an anvil cap and means for urging said anvil cap away from said inner ring:
- an outer ring disposed annularly with respect to said inner ring;
- housing means for holding said rings in rotating relationship with each other, said holding means being adapted to hold one of said rings stationary with respect to said pipe to be cut;
- motor means for rotating said rings relative to each other, and
- cam means affixed to the inner periphery of said outer ring so as to strike the anvil cap on each of said cutting pins on a point of percussion as said rings rotate relative to each other whereby the cutting tips on said cutting pins are driven against the outer wall of said pipe until fracture occurs.
2 more elements
Dependencies are inferred from the claim text.