Method of bending a rigid thermoplastic pipe

Details Method of bending a rigid thermoplastic pipe Method of bending a rigid thermoplastic pipe

1997-04-29

1998-06-16

Bryant, David P.

Metal working

Method of mechanical manufacture

Gas and water specific plumbing component making

29505, 72369, 138140, B23P 1700

Patent

active

057652856

ABSTRACT:
The present invention relates to a method of forming a sharp small radius bend in a rigid thermoplastic pipe having a close fitting metal sleeve without kinking or cracking in the thermoplastic at the bend. Furthermore, the invention comprises a rigid thermoplastic pipe having a metal sleeve with a bend formed in the area of the sleeve.

REFERENCES:
patent: 2435904 (1948-02-01), Robaus
patent: 2774384 (1956-12-01), Wallace
patent: 4377894 (1983-03-01), Yoshida
patent: 4759111 (1988-07-01), Cudini
patent: 4903735 (1990-02-01), Delacour et al.
patent: 5407613 (1995-04-01), Schulte
patent: 5424015 (1995-06-01), Matsuda et al.
patent: 5433902 (1995-07-01), Leyderman
English abstracts for the Japanese and German patents. Applicant does not have the translations of these patents.
Wirsbo Rodipex.RTM. advertising piece.
Pacific Pipe Co. Pipe & Tube Bending advertising piece.
Encircle Tube & Pipe Bending advertising piece.
BendTec Tube & Pipe Bending advertising piece.
Tulsa Tube Bending advertising piece.

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