Hot tap tool

Details Hot tap tool Hot tap tool

1994-05-09

2000-10-03

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Having tool-opposing, work-engaging surface

137318, 408 92, 408137, B23B 4718

Patent

active

061263699

ABSTRACT:
A tool for tapping from a branch pipe into a main pipe to establish communication between the pipes. The tool has a bit for cutting a hole in the main pipe which is secured to an upstream end of a shaft for transmitting torque to the bit. The tool has a branch-engaging member engaged to the branch pipe adjacent to the downstream end of the branch pipe. The shaft has a threaded section engageable with a threaded section of the branch-engaging member so that as the shaft is rotated, the bit is driven along the longitudinal axis of the branch pipe toward the main pipe.

REFERENCES:
patent: 2972915 (1961-02-01), Milanovits et al.
patent: 3102442 (1963-09-01), Black
patent: 3357445 (1967-12-01), Daugherty
patent: 3905718 (1975-09-01), Luckenbill et al.

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