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| Number | Title | Issue Date |
| 7222512 | Method and device for bending a cylindrical tube or the like The invention concerns methods and devices for bending a cylindrical tube or the like (1) so as to obtain two consecutive sections (2, 3) of said tube forming between them a non-null angle alpha. The method is essentially characterised in that it consi... | 05/29/2007 |
| 7152679 | Downhole tool for deforming an object A downhole tool comprises a body defining a fluid chamber, a fluid outlet for directing fluid outwardly of the chamber, and an arrangement for producing a rapid reduction in the volume of the chamber, such that fluid in the chamber is displaced rapidly through the o... | 12/26/2006 |
| 7080436 | Method of manufacturing an axially collapsible driveshaft A method for manufacturing a driveshaft for use in a vehicle drive train system that is axially collapsible in the event of a collision to absorb energy. A workpiece, such as a hollow cylindrical tube, is deformed by hydroforming to provide an axial collapse initiat... | 07/25/2006 |
| 7024769 | Apparatus for producing an assembly linkage on a hollow profile A process and a device produces an assembly linkage on a hollow profile which is shaped for the installation of the assembly part by internal high-pressure remodeling. In order to achieve the shaping of an assembly linkage in a component space-saving, for a subseque... | 04/11/2006 |
| 7013697 | Method for expanding a tubular blank A method for expanding tubular blanks includes pre-expanding or initially expanding a section of the tube by forcing a punch into an open end of the tube. The punching process may be repeated to achieve up to approximately 50% expansion from the original configurati... | 03/21/2006 |
| 7007532 | Process for the production of tubular structural parts fabricated from PGM materials and having circumferential undulating bulges A process for the production of tubular structural parts fabricated from PGM materials and having circumferential undulating bulges by forming from smooth-walled tube pieces. A smooth-walled tube piece (1) is inserted into a cylindrical forming die (2)... | 03/07/2006 |
| 6976376 | Apparatus and method for quenching thin-walled metal hollow casing In an apparatus for quenching thin walled metal hollow casings (6) manufactured by blow molding, the apparatus has a molding tool (1) defining a slot or aperture (21) and a delivery system for applying a coolant to the slot or aperture (21 | 12/20/2005 |
| 6912884 | Hydroforming process and apparatus for the same Providing a method of hydroforming a tube where the hydroformed diameter is less than the tube length and a hydroforming die having two or more die members having an internal shape same as the tube shape and an internal cavity having the desired formed shape. Where ... | 07/05/2005 |
| 6598442 | Production of a component for reducing the effects of an external mechanical impact, and the component produced in this way A process for producing a component for reducing the effect of an external mechanical impact, of the type which comprises an essentially tubular metal element which has a jump in its cross section which is such that under the influence of an axial load it... | 07/29/2003 |
| 6564606 | Manufacturing method and manufacturing apparatus for metallic bellows A manufacturing method for manufacturing a bellows having pleat walls with S-shaped profiles comprises a primary forming process for forming a formed bellows, a pressing process for compressing the formed bellows in the axial direction, and a stretching p... | 05/20/2003 |
| 6442987 | Method of producing a shaft from a piece of tubing, apparatus for making a shaft from a piece of tubing and camshaft produced from a piece of tubing A method and apparatus for producing a shaft from a piece of tubing having at least one bulging portion. The method enables shafts with bulging portions to be cheaply and practicably produced. The piece of tubing bears radially against a portion adjoining... | 09/03/2002 |
| 6401508 | Components of a hydroforming machine The components of a hydroforming machine include a die housing for containing a plurality of dies, a water distribution system, and a means for compressing the dies. The dies includes first and second die plates which are secured together by a key inserte... | 06/11/2002 |
| 6176114 | Method and apparatus for sequential axial feed hydroforming A tube member is placed in a die having a plurality of nodules formed in the cavity thereof. A chamber is formed between a mandrel and end piece within the tube. The mandrel is positioned adjacent a first of the nodules and the chamber is pressurized duri... | 01/23/2001 |
| 6044678 | Method and device for manufacturing a tubular hollow body with spaced-apart increased diameter portions A method and a device for manufacturing a tubular hollow body with increased diameter portions which are arranged at a distance from each other using the internal high pressure deformation process. Initially an internal portion of the hollow body is seale... | 04/04/2000 |
| 5775153 | Hydroforming offset tube Apparatus and method for mechanically and hydroform reconfigurating an elongated tubular workpiece in an elongated cavity between upper and lower tool subassemblies each composed of a plurality of independent tool segments movable axially, relative to the... | 07/07/1998 |
| 5619878 | Method and device for manufacturing a corrugated metal pipe The present invention relates to a method for forming a pipe with a corrugated wall by means of the electroforming technique. The method comprises the stage of forming, possibly partial, on the circumference of the pipe over a length of about one pitch of... | 04/15/1997 |
| 5337590 | Method and apparatus for bending tubes using split bend die Method and apparatus for bending serpentine heat exchanger tubes using a split bend die having a relatively short upper die section with a straight back end. After the tube is bent in conventional manner using a clamp die and a pressure die, the bend die ... | 08/16/1994 |
| 5214948 | Forming metal parts using superplastic metal alloys and axial compression A method for forming metal parts from superplastic metal alloys uses axial compression of the blank starting material. A blank of the superplastic metal alloy is enclosed within a die press. The blank is generally tubular, although not necessarily circula... | 06/01/1993 |
| 5058409 | Apparatus for manufacturing wrinkled pipes Herein disclosed is a wrinkled pipe manufacturing apparatus in which an elastic member is inserted into a pipe to be worked and is pushed from at least one side so that it may be radially bulged to form an annular bulge on the circumference of the pipe an... | 10/22/1991 |
| 5056346 | Method and device for manufacturing bellows pipe A bellows pipe is manufactured, with an elastic body pinched between a collar and a stopper inside a raw pipe being deformed, by pressing the elastic body as to expand radially such that a circumferential portion of the pipe changes to an annular convex p... | 10/15/1991 |
| 5031433 | Method and apparatus for manufacturing a pulley An appratus and method for manufacturing a pulley having a generally V-shaped groove therein is provided. The apparatus includes a press section and a molding section. The starting material for forming the pulley is a ring-shaped workpiece which is prefer... | 07/16/1991 |
| 5007267 | Method and apparatus for manufacturing bellows pipe A bellows pipe is manufactured from a raw pipe, with an elastic body pinched between a movable core and a fixed core inside the raw pipe, by compressing the elastic body by axially moving the movable core to form an annular convex portion in the raw pipe,... | 04/16/1991 |
| 4996857 | Method and an apparatus for manufacturing a metallic bellows A first insert member and a head member are inserted in a cylindrical metal material. A liquid pressure chamber is defined in the material by the first insert member and the head member. First and second dies are situated corresponding to the head member ... | 03/05/1991 |
| 4827747 | Method for producing a bellows with oval cross section and apparatus for carrying out the method After a metallic cylindrical tube is bulged to form a bellows with a circular cross section, this bellows is ovalized to form a bellows with an oval cross section. For this reason, an inexpensive round tube (cylindrical tube) can be used as the material f... | 05/09/1989 |
| 4729806 | Method for making tubes having low weight A method for the manufacture for the tubes or shafts of a composite material and having a low weight, whereby a blank of a material that can be pressformed and which has a substantially even thickness of material is subjected to isostatic pressing on or i... | 03/08/1988 |
| 4488341 | Method of making a fluid pressure actuator A fluid pressure actuator construction and method of making the same are provided, the method comprising the steps of forming a housing with an annular surface, securing an outer peripheral portion of a flexible diaphragm to the annular surface to define ... | 12/18/1984 |
| 4453304 | Method of producing a corrugated, multi-ply metal bellows A method of producing a multi-ply metal bellows wherein the plies are telescoped together to form a multi-ply tube and annular grooves are inwardly rolled in the multi-ply tube at spaced intervals therealong while the tube is supported internally on eithe... | 06/12/1984 |
| 4364252 | Method for the manufacture of diaphragm bellows This invention is a method for manufacturing a diaphragm bellows on a continuous basis, wherein by giving a pressure to the inside of a metallic pipe having the desired diameter, the pipe is bulged in the outer circumferential direction between opposed mo... | 12/21/1982 |
| 4319471 | Apparatus for producing a corrugated tube Apparatus for forming a corrugated tube from a smooth walled starting tube comprises a pair of receiving mandrels aligned spaced from each other along a preferably vertical axis and movable toward and away from each other to be engaged in opposite end por... | 03/16/1982 |
| 4289007 | Apparatus for hydraulically forming sheet metal pulleys Apparatus for forming a sheet metal pulley from a cup-shaped blank in a single hydraulic forming operation. A pair of die holding members supports a plurality of groove-forming inner dies and is movably mounted on a base for horizontal reciprocal movement... | 09/15/1981 |
| 4286450 | Apparatus for manufacturing corrugated tubes An apparatus for manufacturing corrugated tubes comprises a unit with a hydraulic drive for clamping and sealing the tubular billet, and a device for axial compression of said tubular billet communicating with a compressed gas source. The apparatus also c... | 09/01/1981 |
| 4275579 | Apparatus for manufacture of corrugated pipes An apparatus for manufacture of corrugated pipes by the plastic working method comprises a stand-mounted assembly for clamping and sealing a pipe blank, devised in the form of two clamps arranged coaxially at a certain distance from each other to insert t... | 06/30/1981 |
| 4267718 | Apparatus for producing a tube with successive corrugations of different radial extensions and spacings Apparatus for producing a tube with successive corrugations of different configuration from a tubular blank of uniform diameter mainly comprises a central pin having a shaft portion fixed only at one end to a stationary support and having at the other end... | 05/19/1981 |
| 4237713 | Apparatus for producing a tube with successive corrugations Apparatus for producing a tube with successive corrugations from a tubular blank of constant diameter comprises a central pin having a shaft portion fixed only at one end to a stationary support and having at the other end a radially enlarged head portion... | 12/09/1980 |
| 4193280 | Apparatus for the manufacture of expansion bellows An apparatus for the manufacture, by the hydroforming process, of expansion bellows for pipelines or the like, the apparatus being of the type comprising, for contracting longitudinally a sleeve to be formed, an actuating chamber of annular configuration ... | 03/18/1980 |
| 4179910 | Apparatus for manufacturing deformable expansion bellows for pipe-work The manufacture of hydroforming of a deformable expansion bellows. A deformable sleeve is held on a support with an inner sleeve supported inside it to define a space into which is injected liquid under pressure. An axial force is applied to the sheath wi... | 12/25/1979 |
| 4109365 | Method for forming contoured tubing A method and apparatus for forming contoured tubular shapes, wherein the reshaping is accomplished without substantially changing the wall thickness of the tube material such that the strength of the resultant contoured shape is not effected. Forces are a... | 08/29/1978 |
| 4065947 | Compensatory expansion bellows and its production Large diameter expanding bellows is described for pipe systems produced by the invention from portable apparatus combining fixed and slidable rings, the former connected to an end of and the latter sealably mounted on a sleeve and a skirt slideable into s... | 01/03/1978 |
| 4003231 | Rotary machine for manufacturing hollow articles The rotary machine, particularly for manufacturing bellows-type articles, includes a shaping device with a rotor. The shaft of the rotor has mounted thereon a drum carrying slides, each slide being adapted to accommodate a hollow blank, to advance it into... | 01/18/1977 |
