Main line tapping apparatus

Details Main line tapping apparatus Main line tapping apparatus

1989-04-06

1990-02-20

Howell, Daniel

Cutting by use of rotating axially moving tool

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

Having tool-opposing, work-engaging surface

408102, 408103, 408111, 408137, 408138, B23B 4718

Patent

active

049021745

ABSTRACT:
An apparatus for tapping live pipes includes an adaptor for affixing to a pipe, the adaptor including a valve for closing off any opening cut into the pipe. The internal drive shaft has a plurality of transverse apertures spaced apart along its length, so that it can be adjusted longitudinally to different positions with respect to the apparatus which grips the drive shaft and urges it toward the pipe during cutting. This avoids the necessity of designing a plurality of apparatuses which are adapted to cutting bits and devices of different lengths.

REFERENCES:
patent: 160952 (1875-03-01), Quinn
patent: 3847501 (1974-11-01), Doty
patent: 3870431 (1975-03-01), Luckenbill et al.

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