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| Number | Title | Issue Date |
| 7350386 | Method and apparatus for making tubes In a method of making a tube, a sheet metal blank is placed in a U-shaped cavity of a lower mold of a shaping tool, and pressed into the cavity by a ram to shape the blank into a U-shaped configuration. In a next process step, the U-shaped blank is formed between an... | 04/01/2008 |
| 7253372 | Method for welding heat exchanger tube to tubesheet One method for welding includes obtaining a heat-exchanger tube having an outward fold. The tube is inserted at least partially through the orifice of a tubesheet with the fold contacting one of the outward and inward facing sides of the tubesheet. A first electrode... | 08/07/2007 |
| 6588648 | Method and device for transferring a hollow-profile blank During manufacture of certain hollow profiles suitable for use in car body construction the welded profiles are subjected to a further deformation process, namely hydroforming. At present the corresponding welding machines are charged manually. The invent... | 07/08/2003 |
| 5906759 | Stent forming apparatus with stent deforming blades A stent and a method for fabricating the stent are disclosed. The stent has an originally flat pattern and connection points where the sides of the flat pattern are joined. The method includes the steps of a) cutting a stent pattern into a flat piece of m... | 05/25/1999 |
| 4905885 | Method and apparatus for forming and welding thin-wall tubing A method and apparatus for forming thin-wall tubing in a funnel die or with a series of sets of forming rollers. The tubing is then welded by a method and apparatus which includes simultaneous guiding of the both the inner and outer peripheries of the tub... | 03/06/1990 |
| 4837418 | Method and apparatus for forming welded rings A welding machine for welding opposed ends of a forming blank using a micro plasma welding device. The blank formed into a ring and the ends of the ring are clamped in an opposed manner and welded. The next blank to be formed is clamped prior to completio... | 06/06/1989 |
| 4508949 | Method and apparatus for welding tapered metal poles Methods and apparatus for manufacturing tapered, hollow metal poles which can be used for manufacturing poles of various lengths, tapers and cross-sectional dimensions with the same apparatus. A substantially complete, tapered tube is formed from a plate ... | 04/02/1985 |
| 4317003 | High tensile multiple sheath cable A multiple sheath cable for telemetry, heating and communications and methods of manufacturing such cable in long lengths with high tensile strength. The telemetry and communications cable may be of the wire type for conducting electrical signals or fiber... | 02/23/1982 |
| 4310740 | Process for producing large-sized rectangular or square steel pipes A process for producing large-sized steel pipe of rectangular or square configuration from a single plate includes providing a predetermined length of steel plate. The plate is bent to form a longitudinally extending base, opposed sidewalls and a top wall... | 01/12/1982 |
| 4296293 | Progressive welding and forging of overlapped seams in tubular bodies This relates to a method and apparatus for welding thin walled sheet steel tubular members of the type primarily intended for use as container bodies. The sheet steel may be provided with a suitable coating, such as tin plating, and is preferably heated b... | 10/20/1981 |
| 4207453 | Method of producing seam welded tube A method of seam welding metal tube from a sheet metal blank wherein the sheet metal blank is provided with central key locating slots and pre-curled edges, then centrally located on a collapsible mandrel, having a heat sink liner extending therearound to... | 06/10/1980 |
| 4082935 | Apparatus and method for making wheel rim blanks and the like Wheel rim blank manufacturing apparatus comprises an elongated mandrel passing through Coiling, Welding and Machining Stations. Flat stock is fed transversely for coiling to cylindrical rim blanks about the mandrel. A transfer slide advances and maintains... | 04/04/1978 |
| 4016393 | System for laying pipe System for laying pipe, wherein elongate flat sheets of metal are formed and welded to form pipe and wherein the pipe may be discharged for laying in a vertical direction or in a horizontal direction, or in any angular direction therebetween. The apparatu... | 04/05/1977 |
