Variable curvature tube and draw die therefor

Details Variable curvature tube and draw die therefor Variable curvature tube and draw die therefor

2007-11-06

2007-11-06

Suhol, Dmitry (Department: 3725)

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

C072S146000

Reexamination Certificate

active

10611842

ABSTRACT:
A tube is bent having a curved portion with a variable radius extending between first and second ends. The curved portion includes a circular arc portion with a constant radius and a clothoid transition portion with a variable radius. The circular arc portion extends from the first end toward a point of integration. At the point of integration, the circular arc portion merges with the transition portion. The transition portion extends from the point of integration to the second end. As the transition portion extends from the point of integration, its radius of curvature increases over its arc length, thereby, improving the quality of the bent tube by gradually bending the tube over a longer distance, thereby reducing local stresses on the bent portion of the tube.

REFERENCES:
patent: 1714083 (1929-05-01), Frank
patent: 1731087 (1929-10-01), Zatti
patent: 2822023 (1958-02-01), Ahern
patent: 3785190 (1974-01-01), Schall et al.
patent: 4416136 (1983-11-01), Schwarze
patent: 4492304 (1985-01-01), Geis
patent: 4843858 (1989-07-01), Grimm et al.
patent: 5127248 (1992-07-01), Sanseau et al.
patent: 5306212 (1994-04-01), Eberle
patent: 5463888 (1995-11-01), Nagai
patent: 6607021 (2003-08-01), Rahmfeld
patent: 2005/0145002 (2005-07-01), Field et al.
patent: 2256384 (1992-12-01), None

Affiliated with

Also associated with

Rating

Variable curvature tube and draw die therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable curvature tube and draw die therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable curvature tube and draw die therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3827703