Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge
Patent
1975-11-04
1977-05-17
Lanham, C.W.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having inversely angled cutting edge
101205R, 408178, B23G 102, B23G 512
Patent
active
040232115
ABSTRACT:
Apparatus comprising a die head, a carriage provided with the die head and a pair of support rods mounted on a frame in parallel thereto and supporting the carriage movably in opposing relation to the pipe to be threaded. An elongated cavity parallel to the frame is formed in the carriage at a position immediately below the front end of an arm for advancing and retracting chasers on the die head. The support rod on the frame is disposed in the cavity, and a profile member fitted in the elongated cavity is movably supported by the support rod. The front end of the arm on the die head is placed on the top profile surface of the profile member, so that the threading torque of the die head causes the arm to fixedly press the profile member against the suppot rod and, at the same time, the lead of the chasers advances the carriage, while permitting the arm to move on the top surface of the profile member. Thus the open end of the pipe is formed with a tapered threaded portion having a predetermined length.
REFERENCES:
patent: 965156 (1910-07-01), Coes et al.
patent: 1251209 (1917-12-01), Fisher
patent: 1318519 (1919-10-01), Williams
patent: 1396989 (1921-11-01), Breitenstein
patent: 1527185 (1925-02-01), Hall
patent: 1576652 (1926-03-01), Hall
Combs E. M.
Lanham C.W.
Rex Industrial Co., Ltd.
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