Class 72/370.25 - Reduction in diameter

Subclass of Class 72 - Metal deforming
Definition: Process in which the transverse dimension of the annular
No. of patents: 34
Last issue date: 08/12/2008

Number	Title	Issue Date
7409847	Method and apparatus for securing connecting ferrules A ferrule securing assembly including a die set assembly for reducing a cylindrical ferrule. The die set assembly having a female die and a male die. The female die having a female die opening sequentially defined by a tapered section, a parallel section, and a conc...	08/12/2008
7328599	Method and apparatus for making metal ball bats A process for manufacturing a hollow metal ball bat includes forming a shell into a tubular shape using a pilger mill. The wall thickness of the tube shell is reduced by drawing the tube shell with the draw bench. A handle section and a taper section are created usi...	02/12/2008
7229398	Circular-shaped metal structure and method of fabricating the same A circular-shaped metal structure is fabricated by plastic-working and has a wall thickness in the range of 0.03 mm to 0.09 mm both inclusive. A film composed of one of (a) silicon and fluorocarbon resin and (b) copper is coated on a surface of the circular-shaped m...	06/12/2007
7225541	Method for producing hollow rack bar A method for forging a rack bar from a blank pipe. Prior to the rack forging process, a blank pipe is subjected to a process for obtaining an adjustment of a cross-sectional shape of the blank pipe. Such a preliminary adjustment is constructed by a swaging process f...	06/05/2007
7137281	Process and apparatus for forming oversized circular pipe A process for forming oversized circular pipe has the steps of affixing an elliptically-shaped forming head onto a spiral pipe forming machine, driving a metal strip along the forming head such that the metal strip takes on a shape of the forming head, moving said m...	11/21/2006
7114362	Method of making metal workpiece A method for draw forming a desired contour to the outer diameter of a tubular work piece provides that the selected work piece have a wall thickness uniform throughout its length. The outer diameter of selected work piece is reduced along essentially only a part of...	10/03/2006
7062948	Process of end-forming a tube having internal surface features A process by which the end of a tube having at least one internal surface feature is reduced and at least a portion of the surface feature eliminated from the tube end while achieving accurate control of the outer diameter of the tube end. The process preferably mak...	06/20/2006
6898397	Circular-shaped metal structure A circular-shaped metal structure formed by spinning working has a thickness equal to or smaller than 0.09 mm. The structure may be used as a photosensitive drum or fixing belt in an electrophotographic printer. ...	05/24/2005
6851172	Method for securing a rod-shaped part in a holding member In a method of securing a rod-shaped part in a surrounding holding member, a flat holding member is fabricated with opposite side edges that are formed with elements configured for interlocking engagement. The side edges of the holding member are bent upwards, and t...	02/08/2005
6745610	Method of manufacturing arm While one end of a material (31) that has nearly the same diameter as that of a first connecting portion (15) is secured, pressure is applied to the portion between the middle and the other end of the material (31). A slender portion (32)...	06/08/2004
6735998	Method of making metal ball bats A method for draw forming a desired contour to the outer diameter of a tubular workpiece provides that the selected workpiece have a wall thickness uniform throughout its length or a combination of uniform thicknesses at end portions with a mid portion of a tapering...	05/18/2004
6729009	Method for connecting workpieces by cold forming The invention relates to press tools for the connection, by cold forming, of tubular workpieces (2, 3) whose connection regions are provided with circular external cross-sectional shapes and are pushed one into the other. The press jaws (10) of the pre...	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
6615476	Method of manufacturing a hollow shaft having a flange at one end thereof A method is required in which a plate-like flange member may be firmly secured at the front end of a hollow shaft member through a plastic working treatment by virtue of caulking combination, so as to manufacture a hollow shaft having a flange at one end ...	09/09/2003
6561001	Circular-shaped metal structure, method of fabricating the same, and apparatus for fabricating the same A method of fabricating a circular-shaped metal structure, includes the steps of (a) rotating a pipe around an axis thereof, the pipe being composed of a plastic-workable metal, and (b) applying drawing to an outer wall of the pipe with the pipe being kep...	05/13/2003
6536255	Multivoid heat exchanger tubing with ultra small voids and method for making the tubing This invention is a process for making micro-multiport tubing for use in heat exchangers. The tubing is a flat body with a row of side-by-side passageways, which are separated by upright webs. Processing of this tubing involves extrusion, a straightening ...	03/25/2003
6467322	Pipe shaping method A pipe shaping method forms a narrow neck at one end of a workpiece in the form of an elliptical pipe having a cross sectional shape elongated in a predetermined elongating direction, with a roller. The pipe shaping method includes the following steps of:...	10/22/2002
6453536	Method for producing hollow nickel titanium profiles The invention relates to a method for producing hollow nickel titanium profiles with a small external diameter and/or small wall thickness by means of deformation, especially extrusion. According to the inventive method, a composite block is formed, compr...	09/24/2002
6257041	Method of forming a one-piece steering shaft member A method for forming a one-piece steering shaft member, such as an externally splined male steering shaft member (or yoke shaft) or an internally splined female steering shaft member (or slip yoke) is disclosed. A hollow cylindrical tube is initially prov...	07/10/2001
6230540	Method and apparatus for forming an integral bearing shoulder in a tubular axle A tubular axle having a spindle and a bearing shoulder is formed directly into heat-treated tubing. The method generally includes a heating operation, and a two stage forming operation. The first operation is to induction heat a steel tubular axle blank t...	05/15/2001
6119497	Method for use with a lathe for forming a journal on metal stock A forming tool in accordance with the present invention is provided which includes a forming wheel, a shaft, a tool holder, bearings, washers, locking plate, locking bolt, and nut. The forming tool is for use with a lathe to form a journal on the ends of ...	09/19/2000
6038901	Method and device for producing press-rolled pipes with inner wall thickenings at the ends A method for producing press-rolled tubes (3) with a press mandrel (1) and one or more pressure rollers (2), with the tube (3) being arranged between the press mandrel (1) and the pressure rollers (2) and being plastically deformed by means of force loadi...	03/21/2000
5882369	Method for producing a capillary inside a moldable material A method for producing at least one capillary in a moldable material. The capillary has a large length in relation to its cross-section. A closed cavity is created within the moldable material and the material is stretched in at least one direction so tha...	03/16/1999
5533370	Tube rolling method and apparatus According to the rolling method and the apparatus to be used for its execution of the invention, by rolling a tube to be rolled by using four rolls possessing roll grooves for forming a caliber in a shape of having a relief portion, cold reducing or cold ...	07/09/1996
4984444	Method of reducing tubular products A method of reducing tubular metal products includes the steps of selecting a tube to be reduced having the specified initial wall thickness necessary to produce the desired finished wall thickness, and reducing the tube by passing it through a succession...	01/15/1991
4890473	Contracting rim clamp A clamp encircles the outer rim of an out-of-round tubular pipe to reform the cross-section of same into one that is substantially round, the clamp including a ring frame, a plurality of pivotally mounted roller assemblies each having a roller to engage t...	01/02/1990
4722216	Radial forging method A tubular metal workpiece undergoes radial forging employing shrink forming. A multiplicity of dies are arranged circumferentially around the workpiece and urged radially inwardly in a first shrink forming pass to decrease the diameter of the workpiece. T...	02/02/1988
4622841	Method of forming long metal tubing to tapered shape A method for finishing a relatively long metal tubing stock to any desired tapered shape through a single-pass operation. The method is performed with any number of individual swaging units, arranged in tandem each having the identical construction includ...	11/18/1986
4430875	Rolling mill for the stretch-reducing of tubes In a method of rolling tubes in a stretch-reducing rolling mill having a group drive in which the elongation, and therefore the tension is increased by increasing the speed of an auxiliary drive motor relative to that of a main drive motor, the length of ...	02/14/1984
4085489	Process for fabricating hollow races or wheels provided at their lateral ends with axle stumps in which process substantially no chips are produced; and races and wheels manufactured in accordance with this process A roller including a hollow cylindrical pipe portion having an outer diameter corresponding to that of the roller and having axle stump portions which have axial cylindrical end portions. The axle stump portions being at least partially frusto-conically s...	04/25/1978
4079492	Method of making bearing pulley A method of producing bearing pulleys for conveyer belts and roller gravity conveyers in which the bearing pulley includes a cylindrical portion and common central pivot pins secured to the cylindrical portion by a hub or roller base, which comprises prov...	03/21/1978
4028037	Tube treating and apparatus therefor Synthetic resinous thermoplastic tubing is reduced radially in diameter with minimal increase in length by passing the tube through a plurality of successively smaller dies wherein a minor portion of the die moves relative to a major portion of the die du...	06/07/1977
4018634	Method of producing high strength steel pipe A method of treating steel pipe made by forming and welding a mother plate. The pipe is shrunk in the radial direction by applying compressive radial pressure to the outside surface of the pipe to reduce the pipe diameter by at least about 1%. The shrinki...	04/19/1977
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

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Class 72/370.25 - Reduction in diameter