Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8042370 | Flow formed gear A method of forming a ring gear from a ring blank includes providing a mandrel having a central axis and an outer annular forming surface. The outer annular forming surface defines a plurality of forming elements having a forming element axis offset from the central... | 10/25/2011 |
| 7353579 | Flange restoring device and method A method and a device for straightening out irregularities in a flange by pressing a roller against a first side of the flange while supporting an opposite side thereof to preserve the angle between the flange and the part when undergoing compression loading by way ... | 04/08/2008 |
| 7251974 | Method and forming machine for deforming a hollow workpiece The invention relates to a method and a forming apparatus for deforming a hollow workpiece having at least one open end, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, ... | 08/07/2007 |
| 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 |
| 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 |
| 7216746 | Brake drum and process for manufacturing the same A brake drum has its strength elevated in its disk portion. The brake drum is formed from a composition having ceramics dispersed in a matrix. The disk portion has a high ceramic content and thereby a high strength. The brake drum has a disk portion and a cylindrica... | 05/15/2007 |
| 7174759 | Forming machine and method for deforming a hollow workpiece The invention relates to a forming machine at least provided with a clamping device for clamping a hollow workpiece having at least one open end and a first forming tool which can be placed into contact with the outer surface of the workpiece and with which the work... | 02/13/2007 |
| 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 |
| 7131304 | Spinning method and apparatus A spinning method which makes it possible to control the pressing force of a roller tool with satisfactorily high responsiveness and have the roller tool press work following the contour of a forming die even if the die may have its radial length vary at a high spee... | 11/07/2006 |
| 7124609 | Spin forming of HVAC duct reducers Method of a spin forming conical fittings for HVAC systems from 10 to 26-gauge steel material. A flat pattern is cut, stamped or otherwise formed from flat sheet stock or roll stock. The pattern is rolled or otherwise formed into a frustoconical shape. The workpiece... | 10/24/2006 |
| 7121128 | Method of manufacturing elliptic deep-drawn products A method of manufacturing an elliptic deep-drawn product including a first step of providing an intermediate product and a second step of providing an end product. In the first step, a rotary forming die is used to form in a blank a substantially round formed portio... | 10/17/2006 |
| 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 |
| 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 |
| 6907762 | Method and forming machine for deforming a hollow workpiece The invention relates to a method and a forming apparatus for deforming a hollow tubular workpiece, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, the tool is rotated a... | 06/21/2005 |
| 6880421 | Rolled ball screw and method for rolling ball screw groove A rolled ball screw has a screw shaft having a ball screw groove so as to engaging with rolling elements of a ball screw, the screw shaft is formed by rolling while a thread rolling die is pressed against a cylindrical bar-shaped member to thereby roll the ball scre... | 04/19/2005 |
| 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 |
| 6711803 | Method of joining steel products, method of processing junction surfaces of steel products, and reinforcing member The present invention enables to firmly assemble a steel-frame structure. To form a steel-frame structure or to join two steel members being reinforcing members thereof, a slip-proof surface having one or plural concentric higher parts and grooves is formed on the j... | 03/30/2004 |
| 6701617 | Spin-forming method for making catalytic converter A method is provided for forming a catalytic converter that includes a catalyst substrate having a noncircular circumference and surrounded by a metal housing. The catalyst substrate is initially measured to determine the radial dimension of the substrate... | 03/09/2004 |
| 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 |
| 6601284 | Composite brake drum and method for producing same A composite brake drum for use in a drum brake assembly includes a one-piece mounting flange and shell and a liner cast integrally in a shell portion thereof. The method for forming the composite brake drum of this invention includes the steps of: (a) pro... | 08/05/2003 |
| 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 |
| 6526794 | Plate for the spin drum of a centrifuge with spacers and process for its manufacture The invention relates to a plate for a spin drum in a centrifuge. The plates contain integrally formed spacers. These plate spacers are comprised of plate material thickenings and are designed to maintain an intermediate space between two or more plates s... | 03/04/2003 |
| 6381847 | Method of manufacturing poly-V-pulley The present invention provides a method of manufacturing a poly-V pulley made of metal sheet, which can be easily produced from a thick flat-plate material. By this method, the poly-V pulley is formed to have a two-part arrangement of poly-V grooves havin... | 05/07/2002 |
| 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 |
| 6205832 | Flow-forming method and apparatus In a flow-forming method, an axially symmetrical first workpiece is fixed on a spinning mandrel, which together with the workpiece is rotated. At least one spinning roll is infed. The workpiece is formed and shaped while on an axially extending external p... | 03/27/2001 |
| 6154961 | Method for manufacturing an water hammer arrester Methods for manufacturing a water hammer arrester having an endurance against pressure of a fluid as well as excellent productivity. There is provided Methods for manufacturing a water hammer arrester comprising steps of: deforming plastically an end of a... | 12/05/2000 |
| 6006569 | Method for manufacturing a dome from an undersized blank Disclosed is a method of forming a dome from a substantially round blank having a surface area smaller than the surface area of the dome. The basic embodiment of the method includes the steps of shear forming the blank to form a deformed blank, spin stret... | 12/28/1999 |
| 5960661 | Apparatus for working a workpiece An apparatus for working a workpiece comprises a drive unit for rotating a forming tool about an axis of rotation, a forming roller for working said workpiece, means for moving the forming roller in an x-direction and a y-direction with respect to said dr... | 10/05/1999 |
| 5901595 | Apparatus for machining a workpiece An apparatus for machining a workpiece comprises means for clamping the workpiece, means for rotatingly driving the clamped workpiece, a tool for machining the workpiece, the tool having a part for engaging the workpiece, a tool holder, means for moving t... | 05/11/1999 |
| 5775151 | Method and apparatus for spinning a metal sheet To spin a metal sheet around a chuck for forming a product, in a teaching phase involving force control, a product is formed on the chuck by rotating the chuck about the axis of rotation and by moving a forming roller one or several times alongside the ch... | 07/07/1998 |
| 5758532 | Method and apparatus for making a product by spinning Method and apparatus for spinning a product, wherein a metal plate which may be preshaped or not, is deformed on a rotating chuck by a forming roller into a hollow product with a wall thickness. The shape of the chuck is determined and is stored in a memo... | 06/02/1998 |
| 5718140 | Method for manufacturing a rotationally symmetrical work-piece of steel A method for manufacturing a work-piece which is rotationally symmetrical about an axis is provided wherein the work-piece has a spindle and at least one hollow member connected with the spindle by a hub part extending in radial direction. The method incl... | 02/17/1998 |
| 5711174 | Roll forming method and device A roll forming method is used for forming an annular product with a radially outwardly extending flange portion at an end and includes steps of holding a center portion of a work for forming the annular product by a holding device, rotating the work, cont... | 01/27/1998 |
| 5471858 | Apparatus and process for the production of a hollow workpiece being profiled in a straight or helical manner relative to the workpiece axis The well-known Grob cold forming machine for carrying out the Grob method of impact roll-shaping utilizes rolling head carriers that move toward and away from the workpiece wherein each rolling head carrier is provided with rotatably driven rolling heads.... | 12/05/1995 |
| 5428980 | Method and apparatus for producing cap for drink bottle A cap to be fitted around a neck portion of a drink bottle is produced from a cap blank by employing a spinning process. First, the cap blank is fitted around the distal end of a movable guide arranged surrounding a die shaft serving as a spinning mandrel... | 07/04/1995 |
| 5355705 | Process for controlling the revolving path motions of the spinning roller of a spinning lathe, and spinning lathe for performing the process A process is disclosed for controlling the revolutions of the spinning roller (29) of a spinning lathe (10). The coordinate driving units (52,53), which are designed as valve controlled (49,51) hydrocylinders (42,47), are operated according to a playback ... | 10/18/1994 |
| 5355706 | Process for the production of a hollow workpiece being profiled at least internally in a straight or helical manner relative to the workpiece axis The well known Grob method, as practiced on a Grob machine, uses at least a partially profiled mandrel wherein during a cold forming operation, via a forming or impact roller of a workpiece blank, produces a hollow workpiece that is profiled at least inte... | 10/18/1994 |
| 5323630 | Flow-roller machine A flow-roller machine comprises a machine frame, a rotatable spindle, a rotary drive for the spindle, a compression tool attached to a face end of the spindle, an axially displaceable pressure pad aligning with the spindle for a workpiece put in place on ... | 06/28/1994 |
| 5220817 | Spinning machine with at least one roller holder A metal spinning machine with at least one roller holder, the roller holder being mounted exchangeably on a tool rest system with a roller rotatably borne by it. The tool rest system permits the roller to be displaced in at least two coordinate directions... | 06/22/1993 |
