Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7596981 | Method for manufacturing molded then forged parts comprising one or more recesses and the implementation installation thereof This method is original in that it implements the following phases: a foundry preform is created that includes one or more pierced or blind recesses or cavities that match the useful or required shapes of the end part to be obtained; the preform is transferred to a ... | 10/06/2009 |
| 7367211 | Forging device and method for forging work A forging device includes a die having an axis extending generally vertically. A work is placed in the die along the axis. First and second punches extend coaxially with the die and can interpose the work therebetween. A pressurizing section pressurizes the first an... | 05/06/2008 |
| 7343768 | Method of net-forming an article and apparatus for same A method of forming an article such as a helical gear and an apparatus for forming the article are provided. The method includes applying pulsating pressure downward to extruding the work piece and, while the pressure is applied downward, injecting fluid to surround... | 03/18/2008 |
| 7231799 | Method and device for the production of a workpiece with internal toothing, in particular a hollow wheel The invention relates to a method and an apparatus for producing a workpiece with internal toothing, especially an internal geared wheel, by using a cup shaped preform (N) with a substantially cylindrical side wall (N1) and a mandrel (5) with an extern... | 06/19/2007 |
| 7213435 | Splined clutch hub and method of making same An externally splined clutch hub and method for making the same is disclosed wherein a flat circular metal preform with a central opening is provided and contacted with a single forging die to simultaneously cold forge a centrally disposed tubular neck extending out... | 05/08/2007 |
| 7191633 | Forging apparatus A forging apparatus has an upper die unit connected to an actuator for displacement in unison therewith, and a lower die unit confronting the upper die unit and mounted in a body assembly fixed to a foundation. An outer ring is guided axially by a plurality of guide... | 03/20/2007 |
| 7168281 | Method for producing an annular element comprising an inner toothing, especially a sliding sleeve, and device for carrying out the method A method for producing an annular element having an inner toothing, especially a sliding sleeve. An outlet ring element can be arranged in an extrusion device which includes an annular matrix element with an inner bore hole, a sleeve stamping device which is arrange... | 01/30/2007 |
| 7146838 | Method of and apparatus for forming tooth profile A punch fixed to a body assembly is inserted into a hole in a workpiece, and the workpiece is pressed by an upper die to press a splining segment of the punch into the hole in the workpiece, thereby forming spline slots in the inner circumferential surface of the ho... | 12/12/2006 |
| 7117710 | Reverse input blocking clutch and clutch device using the same A reverse input blocking clutch comprises, as main elements, an input member, an output member, a stationary member for constraining the revolutions, locking means, lock release means and torque transmission means. By forming the input member, the output member, the... | 10/10/2006 |
| 7047787 | Method of forming spline and keyway for sheet metal rotating member with boss part An annular excess portion is disposed, a spline forming male mold is passed through a boss of a sheet metal-made rotary member in which a root portion of the boss and a peripheral portion are previously displaced, and the boss is set to a stationary mold with being ... | 05/23/2006 |
| 7044785 | Connector and coaxial cable with outer conductor cylindrical section axial compression connection A connector and coaxial cable interconnectable via axial compression upon a cylindrical section of a solid outer conductor of the cable. The cylindrical section may be formed in the cable by drawing a cable end into an interference fit between a sleeve and an outer ... | 05/16/2006 |
| 7036349 | Scallop output shaft tools A die for forming a work-piece having a complex geometry includes a die insert having an interior surface that defines a first portion of the complex geometry and a retainer ring that selectively engages the die insert. The retainer ring includes a circumferential i... | 05/02/2006 |
| 7007537 | Clam shell system A work piece has an interior cylindrical component. The interior cylindrical component is composed of a beam. The beam is adapted to apply pressure to remove the work piece. An intermediate cylindrical component has four radial spaced cylindrical control arms, an in... | 03/07/2006 |
| 7000319 | Method of manufacturing outer races for tripod-type constant velocity universal joints To make a peripheral lip region to be formed with chamfered portions by the use of a plastic working technique, to enable the use of a cup forming punch of a simplified shape so that a mold used therewith can be easily assembled and the punch when worn down can easi... | 02/21/2006 |
| 6931904 | Method of forming a trailer receiver tube using hollow forward extrusion A method of forging a trailer receiver tube by providing a die having an inner surface defining a first portion and a second portion. Providing a hollow tube having an outer surface. Providing a punch having a body and a shaft extending therefrom sized to fit within... | 08/23/2005 |
| 6877350 | Hub member and shaft journal assembly and method A production method involving forming an inner joint part of a constant velocity universal ball joint in the form of a hub member (11) which comprises a central through-aperture (14) with inner toothing (16) for receiving a shaft journal (12 | 04/12/2005 |
| 6862790 | Dimpling device A dimpling device is provided with a slide rod, a first workpiece holder, and a second workpiece holder. The slide rod is slidably fitted around a center pin running through rivet holes. The first workpiece holder is slidably and detachably fitted around the slide r... | 03/08/2005 |
| 6698267 | Method and impact machine for forming a body A method of forming a body of a formable working material in an impact machine, which comprises an upper impact unit (29 with an upper ram (14), an upper punch (17), a lower impact unit (3) with a lower ram (24), a lower punch (27), and mould cavity for t... | 03/02/2004 |
| 6688153 | Toothed part with a shaft and molding method for the same A method for producing a unitary toothed part with a shaft and the resulting products. In the process, a blank is formed. The blank includes a shaft part and a flange part. The flange part having a thicker outer diameter and a thinner inner diameter. The ... | 02/10/2004 |
| 6457341 | Forging die The invention relates to a forging apparatus used for forging a heated blank (24a), which in a pre-treated operation has been given a volume essentially corresponding to that of the final product, said forging apparatus comprising upper and lower die part... | 10/01/2002 |
| 6053023 | Method of cold forging a workpiece having a non-circular opening A method and apparatus for cold forging a workpiece having a non-circular opening. The workpiece may be, for example, a ball joint housing having a non-circular opening in the bottom. The housing made be made of metal, such as carbon, alloy and stainless ... | 04/25/2000 |
| 6018977 | Method of forming a cylindrical boss and a die therefor A crude work having a cylindrical boss formed integrally with a base plate is processed to a final product by a press work without using additional machining. An inner diameter of the boss is enlarged by a punch, and at the same time an outer diameter of ... | 02/01/2000 |
| 5937691 | Method of forming an inner flange on a sheet metal member having a cylindrical portion The present invention relates to a method of forming an inner flange on a sheet metal member having a cylindrical portion with an inner flange 3 required in coupling of a shaft such as a pulley used in an automobile. The axial length of a boss formed on t... | 08/17/1999 |
| 5907905 | Method for manufacturing a hemisphere of a hemispheric bearing Disclosed is a method for manufacturing a hemisphere used in a hemispheric bearing apparatus capable of performing the mass production and enhancing the mechanical characteristic of the hemisphere by manufacturing a sphere using a pair of forging frames f... | 06/01/1999 |
| 5765425 | Radial extrusion process combined with inside tune ironing A subject of the invention is the radial extrusion process combined with inside tube ironing, which is in essence a cold extrusion process and can be reckoned among bulk metal forming processes. It enables tube shaped metal semiproducts to be formed into ... | 06/16/1998 |
| 5749256 | Method and apparatus for manufacturing a hot rolled beam A method of manufacturing a one piece integral metallic beam (22) having flanges (24), and a web (26) joining said flanges, the beam having been hot rolled from a heated metal workpiece (20) to produce an integral one piece beam having flanges and a web e... | 05/12/1998 |
| 5732586 | Cold extrusion for helical gear teeth A process and apparatus for cold extruding gear teeth and projections comprises machining an annular ring gear blank with precision inside and outside diameters. The gear blank is mounted on a die ring which is arranged coaxially with respect to the blank... | 03/31/1998 |
| 5606888 | Method of forming relatively hard materials A method of forming relatively hard materials is disclosed. The method includes providing tooling for performing the forming operation on a strip (10) of relatively hard material. The tooling includes a forming tool (22) and a mating die (24) coupled to a... | 03/04/1997 |
| 5600992 | Die set An object of the present invention is to provide a die set, which is capable of removing the influence of heat expansion and the change of the number of the collared holes and improving the accuracy of the collar height. In a die set including an upper di... | 02/11/1997 |
| 5471862 | Bearing having arch-shaped recesses and method of manufacturing the same An annular bearing has its bearing surface on the inner surface. The bearing surface is formed to improve bearing properties, that is, to improve adaptability to an impact load and an imbalanced load. A method of manufacturing a bearing having such a bear... | 12/05/1995 |
| 5465597 | Extrusion forming of internal helical splines An extrusion assembly, which fits into a hydraulic press, includes an upper die plate and a lower die plate mounted to one another by die guide posts. A lead bar is coupled to upper die plate at one end and a hydraulic chuck at its other end and includes ... | 11/14/1995 |
| 5274921 | Forming method of bushing with outer sliding surface A bushing having an outer sliding surface is produced by a die forming method without machining. A crowning shape is provided to the outer surface so that the outer diameter of the bushing is smaller at its opposite longitudinal ends, and increases progre... | 01/04/1994 |
| 4841622 | Apparatus for interference-fitting an inner member with an annular outer member An apparatus and method for interference-fitting an inner member having a flange and an annular outer member. The apparatus includes a supporting member for floatingly supporting the inner member at its flange in the axial direction of the inner member. T... | 06/27/1989 |
| 4791803 | Die-change device for a multi-stage forming machine In a multi-stage forming machine, a die-change device, for male dies in a male-die block has a mounting plate for receiving a clamping face of the male-die block on one side. Bayonet fasteners on hollow pistons in the mounting plate then engage the male d... | 12/20/1988 |
| 4774839 | Method and apparatus for necking containers A die necking method and apparatus for producing a smooth tapered wall between the container side wall and a reduced diameter neck includes a plurality of rotatable necking turrets that each have a plurality of identical necking substations each having a ... | 10/04/1988 |
| 4769907 | Method of making a circuit board pin A circuit board pin in which the compliant portion has two beams spaced apart on each side of a slot. The beams have outward facing surfaces which are convex in lateral cross-section. In plan view and in side elevational view the convex surfaces extend ou... | 09/13/1988 |
| 4693107 | Method of manufacturing wound bush bearing with notch-free flange and mold assembly for manufacturing the same A bearing is manufactured by applying an axial pressing force to a cylindrical wound bush and thereby forming a notch-free flange at one end of the bush which is tapered previously. The flange is formed through a kind of plastic flow induced in the tapere... | 09/15/1987 |
| 4676089 | Hub for rotatable tool A central hub for a rotatable tool which can be easily (a) mounted on a polygonal seat at one end of a rotatable mandrel for rotation of the tool with the mandrel and (b) subsequently removed with the tool from the seat of the mandrel. A central opening e... | 06/30/1987 |
| 4674314 | Method and apparatus for single step formation of spherical retainer A tool for stamping annular blanks to form retainers for truncated spherical members in a single stroke stamping operation comprises a sectored punch having at least one pair of diametrically opposed sectors of a cyclinder separated from one another at th... | 06/23/1987 |
| 4667394 | Method of making a commutator ring having segments A method of forming flanged commutator segmental rings in a single power stroke by cold-extrusion which assures full formation of the inner ribs which become commutator segments, so that the segments will anchor well and resist centrifugal force at high r... | 05/26/1987 |
