Pipe tapping tool

Details Pipe tapping tool Pipe tapping tool

1985-11-25

1987-07-21

Schmidt, Frederick R.

Metal working

Means to assemble or disassemble

Valve applying or removing

137318, B23P 1900

Patent

active

046808485

ABSTRACT:
A machine for safely cutting a hole in a pressurized main pipe wall within an attached branch pipe, without requiring temporary main pipe clamps or permanent branch line valves and fittings. The pipe tapping machine is clamped to the branch pipe, providing a temporary seal and self-centering hole cutting guide. A valved port is provided to leak or proof test the branch pipe and sleeve prior to cutting and vent fluid after the hole is cut. Inserts can be provided to adapt to various branch pipe sizes. A hole segment retainer can also be provided to minimize downstream damage to the main pipe. Handles, ratchets and stops are provided to quickly tap the main pipe without damage to the opposite wall.

REFERENCES:
patent: 455890 (1891-07-01), Smith
patent: 2017365 (1935-10-01), Klein
patent: 3976091 (1976-08-01), Hutton
patent: 4519415 (1985-05-01), Carn
patent: 4552170 (1985-11-01), Margrave

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