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WO/1994/025217A2 |
Proposed is a method of machining and a tool (1) to be used for obtaining patterns (14) in the form of alternating ridges (12), pads, cells and ridges of triangular cross section on the surface of a blank (15). The method proposed facili...
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WO/1994/022608A1 |
An improved process and apparatus for forming pipe from a flat steel plate by curving the plate around a rotatable mandrel (1) in which the ratio of plate length and width is relatively high comprising the process steps and apparatus of ...
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WO/1994/022612A1 |
Thin-walled materials are stiffened by bulging without causing material deformations typical of deep-drawing. A material web to be structured with bulges is wound in several layers around spaced apart supporting elements (2), the materia...
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WO/1994/021837A1 |
A method for internally coating steel tube and pipe is disclosed. The method comprises supplying a thin layer of metal to one side of a steel strip prior to formation into a final form. Mixtures of aluminium and zinc may be metal arc spr...
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WO/1994/015735A1 |
A rotary forging machine for the rotary forging of elongate workpieces, has a first platen (28) fixed against rotary movement and a second platen (40) rotatable relative to the first platen (28). The first and second platens (28 and 40) ...
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WO/1994/013414A1 |
In order to simplify and to make more accurate the manufacture of tubular parts with at least a branching tubular section, the whole branching part is shaped out of two flat metal sheets (10) whose shape corresponds to that of an unwound...
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WO/1994/012298A1 |
The invention relates to a pipe structure, its manufacturing method and a resulting product. An essential feature of the pipe structure is a protrusion or fin (3) at right angles to the pipe. The pipe is made by hot rolling a protrusion ...
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WO/1994/011183A1 |
A method of making a perforated tubular member by supporting a thin stainless tube (10) on a mandrel; machine engraving funnel-shaped holes (12) through the tube (10) and removing the machine-engraved tube from the mandrel. An alternate ...
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WO/1994/007655A1 |
Proposed is a tool for working the surfaces of components, the tool having several different zones permitting a single tool to be used simultaneously to harden and polish the surfaces of components and, in particular, finish them true to...
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WO/1994/007620A1 |
In a machine for the formation of helical lock-seam tubing, guide rollers (24A, 25B) are arranged to locate superposed metal strips (9, 11) in laterally staggered relative positions in such a manner that the strips can be passed through ...
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WO/1994/007619A1 |
A hollow bar (3) and a method of manufacturing the hollow bar are disclosed. Typically, the hollow bar is a threaded rock bolt or a drill rod. The hollow bar (3) comprises two or more elongate members (21a, 21b) connected together along ...
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WO/1994/007071A1 |
This invention concerns the manufacture of helically corrugated conduit having at least a portion of its length corrugated in the form of at least one helix. The method includes the driving of a smooth walled tube into a forming head hav...
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WO/1994/004766A1 |
A framework, in particular an at least partially hollow framework, has nodes and members. The nodes (14) are formed by at least a projection (30) on a hollow framework member (12) and by at least a further hollow member mounted and secur...
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WO/1994/002281A1 |
A method of manufacturing structural sheet metal products (P) whereby a number of portions (5\') of sheet metal are fed simultaneously along concurrent planes (alpha) so that the leading edge (14) of one portion (5\') cooperates with a f...
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WO/1993/024944A1 |
Tantalum electrode material is produced which has extremely low tortuosity, exceptionally low ESL and ESR, extended high frequency performance, very high volumetric efficiency, and reduced tantalum consumption per anode. The anode materi...
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WO/1993/023183A1 |
A tubular member having integral exterior protrusions is manufactured by providing a hollow element, for example by extrusion, having therein an axially extending interior defined by a surrounding wall having a thickness varying circumfe...
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WO/1993/019863A1 |
A device for flaring out pipes pushes the pipe wall outwards, forming a neck around its opening. The device has a body (1) to be inserted inside the pipe and a die (3) radially movable with respect to the pipe whose outer diameter corres...
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WO/1993/020382A1 |
Known metal pipes with inner and/or outer linings have the disadvantage that the fit between supporting pipe (1, 2, 3, 8, 9, 10, 20) and inner pipe (5, 14, 15, 21) or outer pipe (16), as well as the sealing of the individual pipes, which...
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WO/1993/017805A1 |
A process for manufacturing structural sheet metal products (P), whereby a strip (4) of sheet metal is fed along a plane (alpha) and cut by a laser (T) into a number of sheets (L1, ..., L4); each sheet being secured to a respective suppo...
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WO/1993/017825A1 |
A device for internally cladding an outer tube with an inner tube by means of an explosion process. The invention is characterized in that the device includes an outer tubular fixture (1) in whicch a workpiece comprising the outer (2) an...
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WO/1993/017803A1 |
In a machine for the production of helically wound tubing from a metal strip, the said strip is advanced within a helical forming head (22) to form a metal tube, and a cutting apparatus for severing the tube as it issues from the forming...
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WO/1993/016896A1 |
A motor vehicle seat recliner includes an upper member (34) which is supportive of a seat back (22) and a lower member (36) which is supportive of a seat cushion (21) and is carried for longitudinal adjustment within a host vehicle. An a...
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WO/1993/013887A2 |
Method and apparatus are disclosed wherein the inner surface of metal tubing (10) is first processed by drawing the tubing (10) with its inner surface in contact with a roughing spinner (34) having a plurality of external spiral teeth (4...
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WO/1993/012900A1 |
A tube finning apparatus comprising a fin wrapping head (7) for dispensing a band of finning material onto a rotating tube (3). The head (7) is arranged to dispense the finning material onto the tube (3) in a manner such that a force is ...
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WO/1993/011401A1 |
Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal...
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WO/1993/009889A1 |
Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotating wheel (43). The billets are advanced first to a edge-shaped gap which deforms the billets and are then advanced to a die (63). The die has a die op...
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WO/1993/005903A1 |
A polygonal tube is produced from metal strip by forming rows of recesses (15) and projections (16) along opposite edges of the strip and then bending the strip until each projection is received in a corresponding recess to form the tube.
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WO/1993/004331A1 |
One embodiment of a heat-exchanger element includes a metal layer (1) and at least one metal conduit (2) which lies against and is fused together with the metal layer and which extends between two mutually opposing outer edges of the ele...
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WO/1993/002829A1 |
The invention relates to a finned tube (1), a process for making it and a device for implementing the process. In the process, at least one endless strip (4) forming the fins is wound approximately helically about a rotating tube body (2...
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WO/1993/002222A1 |
A type II superconducting alloy which is superconducting at a predetermined high magnetic field is prepared by creating a composite having a periodic arrangement of at least two transition metals so as to provide numerous interfaces betw...
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WO/1992/019904A1 |
A tube for fluids is a substantially rigid structural composite of metal and plastics functioning together to provide the tube with strength to resist internal or external fluid pressures through a range of operating temperatures and, wh...
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WO/1992/016815A1 |
A firearm insert has an insertable barrel (27) and a loading shell (21). The mass ratio between the inner and outer diameters of the insertable barrel (27) exceeds 60 % when the inner diameter has less than 5 mm and the outer side of the...
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WO/1992/015409A1 |
In a process for making double-walled tubes by the so-called Bundy method, in particular brake lines, fuel or hydraulic pipes, steel strip (2) copper-plated on one or both sides is formed, immediately after winding, on an inner tool (9) ...
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WO/1992/014564A1 |
An apparatus for cutting spirally formed pipe is disclosed. The pipe cutting apparatus has an inner knife (140) positioned inside a pipe and an annular outer knife (212) positioned outside the pipe. The inner knife moves from an inner po...
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WO/1992/013653A1 |
In a process for the hydrostatic shaping of hollow bodies (21) of cold-workable metal and in a device for implementing the process, pressurised liquid is fed from outside into the hollow body (21) inside a shaping chamber (17) of a swage...
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WO/1992/012844A1 |
A method for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A series of downsizing rollers (37, 57, 59, 61, 63) reduce the outside d...
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WO/1992/010317A1 |
An apparatus for use in guiding tubing of a polygonal, e.g. rectangular, cross-section comprises a pair of platform elements (12A, 12B) each of which is mounted to an arcuate member (10A, 10B), the arcuate members each being guided betwe...
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WO/1992/007669A1 |
In a method of producing helically-wound lock-seam tubing from a metal strip, by clinching together interlocking flanges formed at opposite margins of the strip, the central portion (1) of the strip is supported during clinching of the f...
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WO/1992/007670A1 |
In a machine for the formation of tubing that is helically wound from a metal strip, there is provided a generally cylindrical former (10) about which the metal strip is bent to form corners of tubing of non-circular cross-section. A cla...
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WO/1992/003236A1 |
A method of tube forming comprises successively deforming first and second flat sheets (1, 2) held in overlapping relationship into inner and outer tube walls (4, 5). Opposite edges (2a, 2b) of the second sheet (2) are adjacent each othe...
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WO/1992/002751A1 |
A tubular metal casing (1) comprising closed sections (7), and a flexible tubular duct comprising at least one such frame, are described. Said casing comprises at least one section (7) formed by the walls of a strip and spirally wound ar...
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WO/1992/000153A1 |
Le procédé concerne la réalisation de tubes métalliques cannelés utilisés principalement mais non exclusivement pour la réalisation d'échangeurs de chaleur grâce à leur aptitude particulière aux transferts de chaleur. Il consi...
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WO/1991/018689A1 |
In the manufacture of tubes provided with elevations or recesses, an extrusion billet is preformed (1) and compacted (2) by isostatic pressing whereupon the extrusion billet is extruded (3) into a tube. The extrusion billet consists of a...
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WO/1991/016156A1 |
Tapered conduit (12) having a smaller end and a larger end in transverse dimension including at least one longitudinal formation (65) characterised in that there is provided a pair of longitudinal deformations (60) each having a susbtant...
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WO/1991/013702A1 |
The invention provides that a curved duct section is formed by coiling a strip of metal, the strip being cyclically profiled so that as coiling takes place coils which are narrow at one side and broad at the other side are formed and the...
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WO/1991/010518A1 |
A device for removing the internal flash from a straight-weld electrowelded pipe comprises a casing (4) with groups of cutters (5) provided for removal of the internal flash (d) in steps along the height of the internal flash (d) with si...
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WO/1991/009693A1 |
A sheet steel strip which is wound to form lock seam tubing with helical seams has a projecting edge flange (2) along one longitudinal side and a closable channel (11) on the other longitudinal side, which slips onto the edge flange of t...
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WO/1991/010201A1 |
An automatic welder is used in an internal welder unit (30) which travels along the interior of a pipeline and provides the interior weld passes at the junction of abutting pipe joints (32, 33). The internal welder unit has an elecronic ...
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WO/1991/009188A1 |
Steel wire for reinforcing embedding materials, especially concrete, in which the outline (4) of the cross-section is a three-branched epitrochoid which also has gradually widening and disappearing ribbing (5) along three generatrices wi...
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WO/1991/008064A1 |
An apparatus composed of, successively arranged from upstream to downstream of a roll forming process, an edge bend roll for restraining by rolling a pipe material at a part ranging from an edge portion to a boundary portion with a side ...
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