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| Number | Title | Issue Date |
| 7600406 | Apparatus for rectifying round pipe and tubing Apparatus for reducing the diameter, rounding or straightening of pipe or tubing by rolling comprising a plurality of cylindrical rollers arranged in a parallel-cylindrical array through which the pipe or tubing is passed, the rollers being skewed to displace their ... | 10/13/2009 |
| 7418848 | High-performance and high-efficiency rolled fin tube and forming disk therefor Disclosed herein is a forming disk for fabricating a fin tube. The forming disk comprises a substantially circular plate having a shaft connection hole formed adjacent a center thereof for receiving a shaft of a form rolling machine. A plurality of projections havin... | 09/02/2008 |
| 7276046 | Liquid conductive cooling/heating device and method of use A device for heating or cooling medical fluids to be administered to a patient is disclosed. The device comprises a hollow, cylindrical heat/cold exchanging body having external grooves for receiving flexible tubing, the body comprising conductive material for trans... | 10/02/2007 |
| 7266886 | Method of continuously fabricating a corrugated coaxial cable The invention relates to a method of continuously fabricating a coaxial cable in which ring-shaped corrugations are imparted to a conductor of the cable in a corrugator. The corrugator is made to operate at constant speed. ... | 09/11/2007 |
| 7197808 | Process for forming a groove in a friction layer Device for forming of at least one groove (92, 93, 94, 95, 96, 97, 98) in a friction layer (91) of a covered disk (90) for a force transmission aggregate, in particular for a disk clutch, with a rolling device (1, 11, 21, 31) with at leas... | 04/03/2007 |
| 7159432 | Device for bending profiles by thinning a wall of the profile In a device and in a process for bending a tube 72, the tube 72 is guided through a bending tool 71, which rotates around a section guide housing 81, 82 and also around a cam unit formed by two tubes 83, 84. Rollers 86 serve... | 01/09/2007 |
| 7146835 | Method and apparatus to reduce slot width in tubular members An apparatus and method are provided for reducing the width of a plurality of longitudinal slots or other openings spaced circumferentially around a slotted tubular member. The invention includes a seaming roller positioned to contact the outer surface of the slotte... | 12/12/2006 |
| 7024899 | Roll assembly for a rolling mill A roll shaft assembly especially for a planetary cross roll rolling mill for tubing and the like has the roll shaft and mill roll connected by a conical centering arrangement and a screw, preferably coaxial therewith with the torque transfer being effected by tooth ... | 04/11/2006 |
| 6976377 | Method of and apparatus for producing tubes of metal In the planetary skew rolling blooms to form seamless metal tubing or pipe the internal tool is retracted at the leading and/or trailing end of the tubular bloom to allow the rolls to seal the end or ends and prevent coolant from entering the rolled tubing or bloom.... | 12/20/2005 |
| 6968719 | Apparatus and methods for forming internally and externally textured tubing A machine may produce a tube having textured internal and external surfaces in a single operation. Inner and outer knurling tools may form the textured surfaces. The texturing of the internal and external surfaces may be helical patterns of ribs and grooves. The hei... | 11/29/2005 |
| 6923034 | Wire spring forming apparatus A wire spring forming apparatus which can twist a direction of the wire material so as to coincide with a forming direction of the forming tools with a small moment of inertia by positioning a center point of gravity of the pressure feed rollers and a power transmit... | 08/02/2005 |
| 6918278 | Pipe preparation tool adaptable for different diameter pipes A tool for preparing pipes for coupling using mechanical couplings is disclosed. The tool has a movable roller pivotally attached to a body, a tapered roller rotatably attached to the body and a plurality of tool rollers rotatably mounted on a carriage slidable with... | 07/19/2005 |
| 6904779 | Method of manufacturing a heat exchanger tube with parallel fins A method of forming a finned tube in which the fins are planar, paralleled and extend radially to the tube longitudinal axis, including the steps of positioning at least one rotating forming roll against the tube exterior surface, the forming roll being spaced from ... | 06/14/2005 |
| 6898957 | Method of reducing slot width in slotted tubular liners A method of reducing slot width in slotted tubular liners. A slotted tubular liner (1) is provided having an interior surface (3), an exterior surface (2) and a plurality of slots (4) extending between the interior surface and the exterio... | 05/31/2005 |
| 6792781 | Arrangement for inclined rolling of tube-shaped or bar shaped rolling products An arrangement for inclined rolling of tube-shaped or bar-shaped rolling products comprises at least two rollers adapted to receive therebetween a rolling product so as to determine a longitudinal axis of the rolling product, the rollers are driveable and are rotata... | 09/21/2004 |
| 6666060 | Roller head for a planetary rolling mill A roller head for a planetary rolling arrangement, said roller head comprising a housing, inside which housing there is rotatably arranged a hollow outer axis and means for rotating said outer axis, as well as inside said outer axis, in a manner that tran... | 12/23/2003 |
| 6666058 | Method and device for manufacturing a surface-structured pipe conduit element A method for producing a, in particular thin-walled, pipe conduit element with a surface structure reinforcing the pipe conduit element is proposed wherein the pipe conduit element continuously passes by at least one embossing element guided about the per... | 12/23/2003 |
| 6619089 | Tube corrugating apparatus and method A method and apparatus for forming annularly-corrugated tubes and cables utilizing a multiple gear corrugating head which is rotated about the tube or cable, to be corrugated as the tube or cable is drawn through the head. Two or more of the gears each ha... | 09/16/2003 |
| 6550300 | Apparatus for producing annularly corrugated metal tubes An apparatus for producing annularly corrugated metal tubes, particularly the outer conductor of coaxial high-frequency cables, using at least one pressure roller revolving around a plain tube. The corrugations are formed in the plain tube by the teeth of... | 04/22/2003 |
| 6497129 | Method for rolling tube blanks in a planetary skew rolling mill A method and device for rolling tube blanks in a planetary skew rolling mill continuously feeds tubular blanks which are to be rolled into the rolling gap end to end. A first tube blank is located in the rolling mill. A second tubular blank following the ... | 12/24/2002 |
| 6073473 | Device for corrugating tubes In an apparatus for continuous corrugation of walls of tubes or tubular elements, especially cable components, at least one corrugating wheel, rotatable about its own axis, also rotates about the tubular element to be corrugated. In addition to a drive (1... | 06/13/2000 |
| 5685187 | Arrangement for inclined rolling of tube- and bar-shaped rolling articles An arrangement for inclined rolling of tube-and bar-shaped rolling articles has two or more driven rollers rotatable about a longitudinal axis of a rolling article and supported in or on a rotor which surrounds the rolling article. The rotor is arranged i... | 11/11/1997 |
| 5524467 | Method for the inner profiling of tubes or pipes The invention relates to a method for the better utilization of the working width of a profiling stone in the inner profiling of heat exchanger pipes. The press on width of the revolving roller bodies is substantially narrower than the profile width of th... | 06/11/1996 |
| 5522124 | Roller burnishing apparatus having directly driven, coaxially disposed burnishing head assembly A machine tool apparatus having a burnishing head assembly coupled directly to a hollow, tubular output shaft of the motor of the apparatus. The tubular output shaft is coupled to the armature of the motor and allows a cylindrical workpiece or part insert... | 06/04/1996 |
| 4924568 | Burnishing device for external surfaces of workpieces having circular sectional contours A roller burnishing device for sizing and/or finishing the external surface of a workpiece having a circular sectional contour by causing a relative rotation between the workpiece and a plurality of truncated conical rollers arranged within a head having ... | 05/15/1990 |
| 4876870 | Method for manufacturing tubes The method of the invention relates to the manufacturing of tubes of a continuously cast or the like billet by means of cold working, wherein the temperature of the material rises to the recrystallization range due to the influence of the deformation resi... | 10/31/1989 |
| 4876869 | Inner grooving process for a metallic tube An inner grooving process for the tube expanding rolling type by which inner grooves such as wide width grooves or deep grooves which cannot normally be formed readily can be formed with a high quality using an equipment of a simple structure without dete... | 10/31/1989 |
| 4794775 | Method of producing a heat transfer tube for single-phase flow A method for producing a heat transfer tube for single-phase flow having rows of discontinuous projections formed on the inner surface thereof along one or more spiral curves. Each projection has a circular, elliptic or a similar cross-section constituted... | 01/03/1989 |
| 4776195 | Apparatus for manufacturing core wire for optical fibers An apparatus for manufacturing a core wire for use in laying optical fibers over a long distance produces a plurality of continuous corrugated deep grooves in a wire that are capable of holding therein the optical fibers longitudinally along the periphera... | 10/11/1988 |
| 4736607 | Apparatus for bias rolling of strip metal A process and apparatus for bias rolling of strip metal is provided wherein the strip stock is formed cylindrically and passed through a rolling station wherein roll passes formed by small diameter rolls traverse the stock on the bias along helical paths ... | 04/12/1988 |
| 4712407 | Apparatus for working surface of metal pipe An apparatus for working a surface of a metal pipe is provided. The apparatus comprises a drawing unit for drawing a metal pipe to reduce a diameter thereof, and a working assembly for working the diameter-reduced metal pipe to form an inner surface and/o... | 12/15/1987 |
| 4624122 | Machine for the manufacture of tubes deformed to provide a helicoidal profile for heat exchangers and similar applications For manufacturing tubes of the "corrugated" type, i.e. comprising at least one deformation of helicoidal profile, the smooth tube (28) is displaced axially inside a fixed sheath (7) about which rotates a sleeve (4) fixed to a head forming support for at l... | 11/25/1986 |
| 4602493 | Rolling mill for reducing the thickness of the wall of a tube A method of reducing the thickness of the wall of a tube wherein in the zone of the reduction of the wall thickness, on the internal surface of the tube the plug of a mandrel exerts a pressure causing an increase of the inner diameter, and on the external... | 07/29/1986 |
| 4587820 | Roll head for a planetary crossrolling mill A roll head for a planetary crossrolling mill in which the roll shaft bearing the tapered roll is mounted at one end close to the tapered roll in a radial bearing and an axial bearing while the other end rests with teeth in a rotationally engaged but axia... | 05/13/1986 |
| 4579289 | Skew roller for a planetary type skew rolling mill A skew rolling mill is equipped with a plurality of skew or inclined rollers each of which is constructed of a number of roller segments (1', 2) which are interconnected in a form-locking, force transmitting manner. These roller segments are so related to... | 04/01/1986 |
| 4566301 | Method and means of manufacturing spirally fluted tubes A method and apparatus for the manufacture of spirally fluted tubes and which comprises a rotatable die for receiving the tube longitudinally therethrough during the forming operation for controlling the outer diameter thereof, a clamping apparatus for en... | 01/28/1986 |
| 4512177 | Method of manufacturing metallic materials having a circular cross section The invention relates to a method of manufacturing solid metallic materials having a circular cross section by employing a rotary mill. A three or four roll cross-type rotary mill is employed, with cross and feed angle setting selected so as to meet speci... | 04/23/1985 |
| 4501134 | Rolling mill plants A rolling mill plant has a planetary skew rolling mill and a reducing or sizing rolling line disposed at a short distance therebeyond for the purpose of manufacturing tubes. In order to avoid axial stressing of the work material between the planetary skew... | 02/26/1985 |
| 4480454 | Skew-rolling mill for reducing solid and hollow cross-sections A skew-rolling mill for reducing solid or hollow cross-sections, in which a roll carrier and a first hollow shaft rotatably mounted therein and allowing passage of the rolled stock are supported rotatable independently of each other in a stand. The roll c... | 11/06/1984 |
| 4457152 | Apparatus for changing the tapered rolls of a skew rolling mill The apparatus for changing the rolls (6) of a skew rolling mill comprises a roll-change carriage (14) movable along the direction of feed of material (10) being rolled. A carrier (11) is mounted on the carriage (14) and carries a plurality of roll-clampin... | 07/03/1984 |
