Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7363709 | Wheel and method of manufacturing the same The present invention provides a wheel and manufacturing method of the same which make it possible to prevent the formation of indentations along the hump parts in the inner circumferential surface of the rim. In a wheel which comprises a cylindrical rim consisting ... | 04/29/2008 |
| 7347072 | Sheet metal hem forming process A method for hemming an inner panel and an outer sheet metal panel together. The inner panel has an outwardly extending perimeter flange comprising an end surface, an inboard surface, and a beveled surface located between the end surface and the inboard surface. The... | 03/25/2008 |
| 7331206 | Method of fabricating component having internal teeth and rolling machine thereof The present invention provides method of fabricating components having internal teeth and rolling machine thereof, enabling large deformation at main rolling step omitting broaching step and step using gear shaper. A container having toughness against internal press... | 02/19/2008 |
| 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 |
| 7316142 | Metal spin forming head The present metal spin forming head includes two sets of rollers, with each set having a series of individual metal working rollers therein. The rollers of each set are circumferentially spaced evenly about the head, with each of the rollers of the second set being ... | 01/08/2008 |
| 7243770 | Clutch assembly including strengthening members A clutch housing assembly for use in vehicle drivelines includes at least one strengthening member at an open end of the housing. The strengthening member preferably is formed by cutting away portions of the housing near the open end and then deforming the remaining... | 07/17/2007 |
| 7243517 | Method and device for deforming a workpiece made of a material having an exponential tensile stress-strain behavior into a thin-walled, hollow shell The present invention relates, among other things, to a method for forming a workpiece (240) of a material having an exponential tensile stress-strain behavior into a thin-walled, hollow shell (243). In this method, the workpiece ... | 07/17/2007 |
| 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 |
| 7219520 | Method and forming machine for working a workpiece An aspect of the present invention relates to a method and a forming machine for working a workpiece, for example by deforming it or fixing it in another workpiece, in which the workpiece is fitted over a mandrel, at least a part of the mandrel is expanded so as to ... | 05/22/2007 |
| 7215916 | Endless metal belt, fixing belt and heat fixing device Objects of the present invention are to provide an endless metal belt superior in flexing resistance and durability, to provide a fixing belt using the endless metal belt, and to provide a heat fixing device with high durability and high reliability. The objects are... | 05/08/2007 |
| 7191626 | Method for producing an inner contour with an internal arbor acting on the inside wall of a workpiece In the production of an internal contour with an internal arbor acting on the inner wall of a cup-shaped or annular rotationally symmetrical workpiece, expansion and length change of the workpiece are avoided during cold forming. Thus, gear components with internal ... | 03/20/2007 |
| 7188499 | Method and device for processing outer shape of can shell A pressing member 44 is pressed from the outside against a peripheral wall of a can shell 4 whose interior is maintained at a predetermined pressure by gas, to form a recess-deformed portion 56 having a predetermined shape on the peripheral wall... | 03/13/2007 |
| 7181945 | Semi-manufacture pulley forming apparatus A pulley is made by fixing an edge of an opening of a plate by using a first upper mandrel ring installed at a lower end of a first supporting pin of a first forming device. A supporting block disposed around an upper end of a first spindle is rotated with the first... | 02/27/2007 |
| 7152446 | Method of forming internal gear, and internal gear At the time for forming an internal gear from a raw material 2 of an internal gear, first, the raw material 2 is externally inserted onto a forming die 3 and fixed to the forming die 3 through a pressing die 4. Next, a forming roll... | 12/26/2006 |
| 7152445 | Method and forming machine for working a workpiece The invention relates to a method and a forming machine for working a workpiece, for example by deforming it or fixing it in another workpiece, in which the workpiece is fitted over a mandrel, at least a part of the mandrel is expanded so as to fix the workpiece, th... | 12/26/2006 |
| 7134304 | Micro-roll forming device A micro-roll forming device for providing a cylindrical blank metal article with a minute convexoconcave bearing surface, comprises a powered article holding structure that, when energized, rotates the cylindrical blank metal article about its axis; a forming tool t... | 11/14/2006 |
| 7127926 | Circular and oval flanged rings for ducting and method of making A method of making Circular and Oval Flanged Rings, for the connection of thin walled circular and oval ducting, including Circular and Oval Flanged Rings having a Sheet Metal and Air Conditioning Contractors National Association (SMACNA) standard T24 Profile. Thin ... | 10/31/2006 |
| 7082796 | Circular and oval flanged rings for ducting and method of making A method of making Circular and Oval Flanged Rings, for the connection of thin walled circular and oval ducting, including Circular and Oval Flanged Rings having a Sheet Metal and Air Conditioning Contractors National Association (SMACNA) standard T24 Profile. Thin ... | 08/01/2006 |
| 7082805 | Manufacturing method for cylindrical part It is an object of the present invention to provide a method of manufacturing a cylindrical part with a thin-walled portion at a lower cost, and according to the manufacturing method of the present invention, a base metal formed with thin-walled portion adjacent to ... | 08/01/2006 |
| 6955283 | Adaptable mandrel for spin forming There is provided a mandrel for spin forming that has a backing plate with removably attached mandrel portions and mandrel spacers, such that the mandrel is adaptable to numerous configurations. The various configurations of the mandrel are used to provide different... | 10/18/2005 |
| 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 |
| 6883358 | Method of producing sliding sleeves for gearshift mechanisms A method of producing a sliding sleeve for gearshift mechanisms includes two forming steps. In the first forming step a preform, which has been pushed onto a tool mandrel with an external toothing, is formed by roller spinning so as to form on the inner circumferent... | 04/26/2005 |
| 6817219 | Flospinning method and device for carrying out flospinning A flow-forming method and apparatus, in which a blank is placed on a rolling mandrel of a flow-forming machine, the blank is rotated relative to at least one flow-forming roll, the at least one flow-forming roll is infed radially and/or axially relative to the blank... | 11/16/2004 |
| 6769522 | Fluid-type torque transmission device with lockup clutch A strong lightweight front cover 11 that prevents distortion of a sliding contact surface when the front cover and impeller shell are welded together is provided. The front cover 11 has a radial flange part 44 and an axial flange part 42 ... | 08/03/2004 |
| 6758077 | Manufacturing method of cylinder A method of manufacturing a cylinder, includes a step of inserting a cored bar 2 into piping material 1 having a reduced inner radius at one end and supporting the end of the cored bar with the reduced radius section of the piping material 1. Th... | 07/06/2004 |
| 6732429 | Method for measuring pressure on the substrate of spin formed catalytic converter The present invention is generally directed towards a catalytic converter installed in the motor vehicles. More specifically to a method of measuring the pressure on the substrate as the catalytic converter is subject to the spin forming process. A pressure-measurin... | 05/11/2004 |
| 6691542 | Method and apparatus for manufacturing a cylindrical member, and cylindrical member having splines Excessive increase in processing loads and damages to a thickening roller resulting from pressing the thickening roller against the blank from the outer peripheral end face are prevented, and processing of a cylindrical member having an enlarged diameter ... | 02/17/2004 |
| 6644083 | Spin forming a tubular workpiece to form a radial flange on a tubular flange and a bead or thick rim on the radial flange A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially... | 11/11/2003 |
| 6640438 | Process and machine for uniting rotatable machine components A hub (2) includes a spindle (14) which projects through a housing (4) and rotates relative to the housing (4) on a bearing (6) that is located between the spindle (14) and the housing (4). The bearing (6) has two sets of raceways (28,40) that are oblique... | 11/04/2003 |
| 6571590 | Method for producing a rim for a pneumatic tire The invention related to a method for producing a rim for a pneumatic tire. A rim base with a rear rim flange is produced from a ring-shaped blank by exerting pressure. Said rim base is then connected to a bowl of a rim at the side thereof facing away fro... | 06/03/2003 |
| 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 |
| 6539765 | Rotary forging and quenching apparatus and method A rotary forging and quenching apparatus and method forms and rapidly cools an axial-symmetric object from a spin formable material. The process uses a preheated billet which is clamped between opposed fixture mandrels which have a circumferential die sha... | 04/01/2003 |
| 6530253 | Method for producing cylindrical member having spline grooves, and cylindrical member having spline grooves The disclosed method produces a spline-grooved cylindrical member, e.g. torque converter front cover, including a cylindrical portion having a target wall thickness t2, from a plate blank having a plate thickness t1. An outer peripheral portion of a disc-... | 03/11/2003 |
| 6523385 | Process for preparing the end of a pipe for drawing over a mandrel A process for preparing the end of a pipe for drawing over a drawing mandrel, including the following steps: (a) inserting a preforming mandrel into an end of the pipe, the preforming mandrel having a first section having a diameter which is substantially... | 02/25/2003 |
| 6508094 | Internally-toothed member, and method and apparatus for molding same The present invention provides an internally-toothed member of reduced size and enhanced quality, durability and productivity in manufacture. This internally-toothed member has a first cylinder portion and a second cylinder portion which is larger in diam... | 01/21/2003 |
| 6334349 | Method for the manufacturing of a shaft with a larger diameter flange The invention relates to a method for the manufacture of a shaft with a larger diameter flange, particularly for a cone gear, a round stock as the workpiece being rotated about its longitudinal axis relative to at least one spinning roll and is axially co... | 01/01/2002 |
| 6298702 | Method for making seamless wheel rims A method for forming seamless tubular workpieces, such as vehicular wheel rim components. In the method, a flat circular blank having a central aperture is expanded into the interior of a hollow mandrel using a mushroom-shaped spinning roller. In this exp... | 10/09/2001 |
| 6295854 | Device and method for moulding a grooved structure into a tubular workpiece According to the invention, a press roller device (1) for molding a grooved structure inside a tubular workpiece (7) has several press rollers (4,5,6), said press rollers rotating around a form tool (2) and being staggered axially in relation to one anoth... | 10/02/2001 |
| 6269670 | Method for forming a workpiece by flow-forming The invention relates to a method for working or forming a workpiece by flow-forming, particularly for the manufacture of internal teeth on the workpiece, in which a cup-shaped preform or blank is axially fixed against a tool chuck and pressed by means of... | 08/07/2001 |
| 6253589 | Flow-turning device and method for producing internally geared wheels using two sets of internal toothing The invention relates to a flowturning device (1; 101) for producing an internal geared wheel (17) with inner toothing, one set of which is slanted. The workpiece (9) is held by a retaining member (16; 116) during shaping of the first inner toothing. The ... | 07/03/2001 |
