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| Number | Title | Issue Date |
| 7299671 | Bending device for bending machine A bending device for bending machine comprises a matrix (2), a countermatrix (6), and a die (7) able to prevent wrinkles. A countermatrix-holder support element (8) is fixed on an upper slide (10), which is slidable transversally t... | 11/27/2007 |
| 7290421 | Variable curvature tube and draw die therefor 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 extend... | 11/06/2007 |
| 7251976 | Apparatus and method for the noncircular bending of tubes A tube bending apparatus adapted for the noncircular bending of a tube includes a modified bend die, a modified wiper die, a translatable and pivotable element and an actuator. The bend die presents a noncircular bending profile having a linearly or nonlinearly incr... | 08/07/2007 |
| 6134932 | Machine for bending or cambering a profile section, and bending head therefor A machine for bending or cambering a profile has two bending rollers mounted on a tool holder carriage, a block for supporting the tool holder carriage with respect to which the latter is pivotably mounted about a rotational axis coaxial with the axis of ... | 10/24/2000 |
| 4941338 | Device for cold forming of ferrous and non-ferrous metal sections In the process for the cold forming of ferrous and nonferrous metal sections, pretensioning is applied to the initially essentially straight metal section, which is clamped at both ends. Next, the tensioned metal section is bent in a rotating bending tool... | 07/17/1990 |
| 4727737 | Method and apparatus for bending a heat exchanger coil A method and apparatus for bending a heat exchanger coil, and particularly a fin-on-tube coil, is provided which reduce pressure on the coil at a bending location to prevent damage to the fins and coil by effecting relative movement between a support bed ... | 03/01/1988 |
| 3977819 | Apparatus for bending thermoplastic shapes Apparatus for bending rigid extruded thermoplastic resin shapes without significant deformation of the cross-sectional configuration of the shape is described. The bending apparatus includes a rigid die member which has a convex die surface configured to ... | 08/31/1976 |
