Pipe tapping drill attachment

Details Pipe tapping drill attachment Pipe tapping drill attachment

1997-08-27

1999-04-13

Pitts, Andrea L.

Cutting by use of rotating axially moving tool

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

Having tool-opposing, work-engaging surface

137315, 408 72R, 408 92, B23B 3900

Patent

active

058936866

ABSTRACT:
This invention relates to a housing having a shaft with a drill bit for tapping a pressurized fluid pipe. A saddle having a valve is attached to a pipe. A housing having a shaft passing therethrough is threaded to the valve. A drill bit is attached to one end of the shaft and a drill is connected to the other end of the shaft. The housing has a chamber in which the drill bit is retracted before connecting the housing to the valve. With the valve in the open position, the shaft is extended until the drill bit engages the pipe. The drill rotates the drill bit and cuts a hole in the pipe. The housing is sealed such that fluid entering the housing chamber does not escape along the shaft. The shaft and drill bit is then withdrawn into the housing chamber and the valve closed. The housing is then removed from the valve and a branch pipe connected thereto. The valve is then opened to fluidly connect a branch.

REFERENCES:
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patent: 2870629 (1959-01-01), Willis
patent: 3272033 (1966-09-01), Leopold, Jr. et al.
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patent: 3827448 (1974-08-01), Alba
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patent: 3870431 (1975-03-01), Luckenbill et al.
patent: 3995655 (1976-12-01), Sands
patent: 4431017 (1984-02-01), Willemsen
patent: 4902174 (1990-02-01), Thompson et al.

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