Tool for removing end of cut-off pipe from a pipe coupling

Details Tool for removing end of cut-off pipe from a pipe coupling Tool for removing end of cut-off pipe from a pipe coupling

1993-03-04

1995-03-28

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408 82, 408227, B23B 5102

Patent

active

054011264

ABSTRACT:
A bit usable in combination with a rotatory driver, such as a drill, for extracting a remnant of a cut-off pipe from a pipe socket. The bit comprises a forward portion which is a pilot to keep the bit centered in the remnant and thereby centered in the pipe socket, a forward-facing ring cutter whose inner and outer diameters generally match the inner and outer diameters of the pipe remnant being extracted, said ring cutter being operable to cut and/or scrape the remnant edgewise from the socket, and a forward facing ring scraper operable to stop the bit from excessive penetration into the pipe socket and operable to scrape bonding material remnants from the end face of the pipe coupling.

REFERENCES:
patent: D170119 (1953-08-01), Hull
patent: 1418485 (1922-06-01), Smith
patent: 1620536 (1927-03-01), Gairing
patent: 1711012 (1929-04-01), Brandt
patent: 2389909 (1945-11-01), Hofbauer
patent: 2761335 (1956-09-01), Bernardi
patent: 2897696 (1959-08-01), Tisserant
patent: 3028772 (1962-04-01), Mossberg
patent: 3532010 (1970-10-01), Klintworth
patent: 3752593 (1973-08-01), Fitzgerald et al.
patent: 3824027 (1974-07-01), Janci
patent: 4693643 (1987-09-01), Keyworth
patent: 4930948 (1990-06-01), Bowen
patent: 4968193 (1990-11-01), Chaconas et al.

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