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| Number | Title | Issue Date |
| 8051694 | Method of and apparatus for manufacturing shaft A shaft manufacturing apparatus includes a first drawing die having a cylindrical first cavity defined therein which is open at both ends thereof and a second drawing die having a cylindrical second cavity defined therein which is open at one end thereof. The angle ... | 11/08/2011 |
| 7621164 | Push bench and method of manufacturing small diameter tubing The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod att... | 11/24/2009 |
| 7290424 | Push bench method for manufacturing small diameter tubing The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod att... | 11/06/2007 |
| 6837091 | Tube drawing method and device A method of elongating a tube (10) by way of a drawing ring (13), wherein, when elongating the tube (10), tensile forces are applied to an elongated tube portion (22) which has already passed through the effective drawing ring cross-secti... | 01/04/2005 |
| 6807837 | Method and apparatus for producing variable wall thickness tubes and hollow shafts A method and apparatus for draw forming, from a tubular workpiece, a tube or hollow shaft having a variable wall thickness, using a reducing die without an internal mandrel. A tension force is applied to the workpiece at one axial side of the die and a compression f... | 10/26/2004 |
| 5487292 | Method and apparatus for advancing tubing into a draw die The invention is directed to a method and apparatus for advancing tubing into a draw die in reducing the diameter of the tubing. The tubing is advanced forward through opposed rotating tolls which apply compressive stress to the tubing and through a close... | 01/30/1996 |
| 5136872 | Process for the preparation of tubular ingot moulds intended for installations for the continuous casting of steel The process serves for the preparation of tubular copper or copper alloy chills or ingot moulds for use in continuous steel casting system, including a first stage comprising the formation of an inclined shoulder on one end of a tubular blank having a rec... | 08/11/1992 |
| 4724993 | Longitudinal seam welding apparatus for use in seam welding motor frame main body joint A longitudinal seam welding apparatus for welding a longitudinal joint of a cylindrical main body of an electric motor frame comprises, on a base, a rigid tubular welding jig including a guide for engaging the joint of the frame main body to be welded for... | 02/16/1988 |
| 4224818 | Method and apparatus for cold finishing of metals An apparatus and method of cold finishing of metals wherein a metal workpiece having a repeating cross section is advanced between a plurality of pairs of rollers and is driven through a die or cutting tool. The apparatus includes entry vee guides, a gimb... | 09/30/1980 |
| 4063439 | Apparatus for calibrating and surfacing tubes An improvement in a process and apparatus for internal finishing and calibrating tubes is provided in which the internal surface of the tube is sprayed during the work on the tube with at least one lubricating jet directed to the work zone ahead of the pa... | 12/20/1977 |
| 4027514 | Device for continuous extrusion A device for the continuous extrusion of an object of indefinite length into another object of indefinite length by means of movable elements which move inside a resistant body forming a continuous pressure cylinder inside which the object to be extruded ... | 06/07/1977 |
