Process and device for pipe bending
US5127248A · kind A · utility
12Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Jun 6, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pipe bending die, in the shape of a cylinder, has a groove gouged out of its lateral surface and a cross section which is a semi-circle of a diameter equal to the diameter of the pipe to be bent. The base of the cylinder is bounded on one hand by a portion of logarithmic spiral defined in polar coordinates by the equation P=Poe-k.theta., bounded by the points .theta.=0 and .theta.=2.pi., and wherein Po and k are positive constants and, on the other hand, by a segment of straight line joining the points of the spiral for which .theta.=0 and .theta.=2.pi..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.