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US 4,059,978 AGranted
Tube bending machine
OwnerPaul Dettlinginventor
Life of this patent
Estimating the term…
Abstract
Portable hydraulic tube bending machine adjustable for bend angle and adjustable to tubing with and without collars and straight and pre-bent tubes, whereby complicated bendings can be carried out at the place of use and with a minimum of space.
Claims8
A tube bending machine having hydraulic drive including a hydraulic cylinder characterized by the following:
- a single hydraulic pressure cylinder means, a lever system, a bending roller, the lever being operative in a first partial stroke of its driving stroke so as to press a tube to be bent against the bending roller, a pivotally mounted bending arm having detent means associated therewith, and the lever system being operative in a second partial stroke to swing the pivotally mounted bending arm around the axis of rotation of the bending roller, the detent means normally restraining the bending arm and being released by the said lever system at the end of the said first partial stroke.
Dependencies are inferred from the claim text.