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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7412866 | Tubular articles with varying wall thickness and method of manufacturing same A method for manufacturing a one-piece axle tube housing with localized sections of increased wall thickness includes providing a tube blank, inserting a mandrel having a reduced diameter profile, passing the tube through an extrusion die to conform the tube to the ... | 08/19/2008 |
| 7107682 | Method for manufacturing tubes and profiles The invention relates to a method for manufacturing tubes and profiles with variable wall thickness over the length. The method comprises the steps of flexible rolling of continuous material strip with variable thickness in the longitudinal direction of the strip ma... | 09/19/2006 |
| 6915821 | Metal tube and its production method A small diameter metal tube whose inner surface is smooth and its production method are provided. The metal tube has an inner diameter of up to 1.0 mm and its inner surface has a maximum height difference (Rf) in the surface roughness of up to 3 μm. ... | 07/12/2005 |
| 6910618 | Method for preparing pipe for butt welding A steel pipe is welded to a threaded connector that has an end with a desired nominal inner diameter. A swage is forced over an end of the pipe, reducing an outer diameter and an initial inner diameter of the end of the pipe. A die is then forced into the end of the... | 06/28/2005 |
| 6883552 | Metal tube and its production method A small diameter metal tube having at least two inner diameters is provided. A method for producing this metal tube is also provided. In this method, a plate member having a development shape of the metal tube is blanked from a metal thin plate so that the plate mem... | 04/26/2005 |
| 6748786 | Metal tubular body and manufacturing method thereof A metal tubular body of small diameter having a varying wall thickness is provided. The tubular body has a minimum inner diameter of up to 2 mm and a maximum wall thickness of up to 0.5 mm, and the wall thickness varies along its longitudinal axis. ... | 06/15/2004 |
| 6729170 | Method for fabricating fuser roller A fuser roller is obtained by heating a blank over predetermined regions starting from both the opening ends, and then necking the heated regions of the blank by moving a forming roller with rotation on the heated regions through the external pressing of the forming... | 05/04/2004 |
| 6718811 | Process for producing a guide tube of a nuclear reactor fuel assembly, mandrel for forming the guide tube, and the guide tube obtained A tubular blank (22) is rolled on a mandrel (14) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank (22) is rolled on a first part (18,19) of the mandrel (14), with a reduction of the outside diameter of... | 04/13/2004 |
| 6321581 | Process for increasing the wall thickness in hollow sections The invention relates to a process for producing a region of greater wall thickness in a longitudinal hollow section (1) which, to this end, is subjected to a radial and axial pressure and plastically deformed thereby. The hollow section (1) is secured in... | 11/27/2001 |
| 5956988 | Process for heading pipe ends and device for implementing it The present invention is a novel device and method of shaping an end of a pipe. One end of a pipe is inserted into a shaped die in such a way that the outer surface of the pipe rests against the interior portion of the die. A piston is then inserted into ... | 09/28/1999 |
| 5074555 | Tapered wall shaft with reinforced tip A tapered wall shaft with a reinforced tip includes a rear portion, a front portion and an interconnecting portion. The interconnecting portion has a smoothly decreasing outer diameter and a smoothly increasing wall thickness. The tapered wall shaft with ... | 12/24/1991 |
| 5040399 | Method of fabricating box section from steel with walls that differ in thickness A method of fabricating box section from steel with walls of non-uniform thickness along its periphery. A starting product in the form of round tubing with a wall that is uniformly thick along its circumference is manufactured and rolled into box section ... | 08/20/1991 |
| 4625537 | Localized boss thickening by cold swaging To reduce the length of a tube thickened by swaging and to provide acceptable efficiency in use of material and vessel length for a high performance pressure vessel, the tube is locally corrugated, then conventionally swaged and subsequently pressurized t... | 12/02/1986 |
| 4157654 | Tube forming process A method of forming a tube by pushing it through a tilted die to form a bend or change circumferential variations in wall thickness.... | 06/12/1979 |
| 3977227 | Method of cold extruding ductile cast iron tube Annular articles are produced by cold extruding a tubular ductile cast iron piece through a female die to desirably change the shape of at least an axial portion of the piece. The invention is based on the discovery that the nodular carbon content of duct... | 08/31/1976 |
