The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7219578 | Flywheel In a flywheel 2, a central part of a thin plate portion 3 having a flywheel mass provided on an outer peripheral side of the plate portion is joined to an end surface of a crankshaft 1 through a plurality of bolts 7 disposed annularly at ... | 05/22/2007 |
| 7201389 | Vehicle transmission A vehicle transmission includes a plurality of driven gears comprising a series of concentrically spaced ring gears. Each ring gear of the plurality of driven ring gears has an inner diametrical surface and an outer diametrical surface. Each outer diametrical surfac... | 04/10/2007 |
| 7101296 | Synchronous rear belt drive system for motorcycles and method of use A synchronous rear belt drive system for belt driven motorcycles and a method of altering the final drive ratio of such motorcycles utilizing the present rear belt drive system is disclosed. The present rear belt drive system provides a plurality of interchangeable ... | 09/05/2006 |
| 7055243 | Crankshaft damper with integral pulse ring and method The invention comprises a crankshaft damper having an integral pulse ring. The crankshaft damper comprises an inner hub and outer pulley with an elastomeric connecting member between each. The elastomeric ring dampens a crankshaft vibration. The integral pulse ring ... | 06/06/2006 |
| 6993993 | Sheet metal outsert-molded gear A sheet metal outsert-molded gear, in which a molded resin gear is formed by outsert-molding along the outer perimeter of a disk-shaped sheet metal, characterized in that one or more notches, holes, or protrusions are provided in the outer perimeter of the disk-shap... | 02/07/2006 |
| 6622839 | Multiple clutch arrangement A multiple clutch arrangement includes a drive member, first and second output members, a first clutch arrangement for selective activation of a first torque transmission path between the drive member and the first output member, and a second clutch arran... | 09/23/2003 |
| 6510762 | Member comprising several layers of a flat material and method for making the same A control cam or a gear wheel having a plurality of layers of flat material placed one on top of the other. Each of the layers of flat material is of a multi-part form with partition lines that extend in a direction of planes over the layers of material. ... | 01/28/2003 |
| 6464058 | Hub for a clutch A hub for a motor vehicle clutch includes a driver and a ring element arranged on the driver and constructed as a sheet metal part with a profile that receives torque to be conducted into a driven shaft by friction facings via the driver. The driver is al... | 10/15/2002 |
| 5809649 | Method for the manufacture of a machine part having external toothing A method for the manufacture of a machine part with external toothing from a circular sheet metal blank. According to this method the blank is fixed between a tool and a tail stock. Subsequently the circumferential edge of the circular sheet metal blank i... | 09/22/1998 |
| 5404640 | Method of forming toothed wheels A method is provided for forming a one-piece sheet metal toothed wheel including a central sheet metal wall of predetermined thickness and a series of integral teeth on the periphery of the central wall. The method comprises a combination of steps the initial ... | 04/11/1995 |
| 5367916 | Drive gear for a motor vehicle A drive gear for a motor vehicle including a starter disc having a hub for attachment to a shaft of a vehicle motor for joint rotation therewith, and a drive ring which is supported on the starter disc, is provided with a plurality of holes for connecting... | 11/29/1994 |
| 5337626 | Laminated gear and method of forming a laminated gear A laminated gear and a method of forming the laminated gear are disclosed. The method comprises punching a central hole and a circular array of closely adjacent perforations in a generally planar sheet. The array defines an interior portion having the out... | 08/16/1994 |
| 5203223 | Cold-forming of toothed wheels from sheet steel A cold-formed gear made from a single circular sheet of sheet metal. The gear is formed to have a central wall and a series of gear teeth surrounding the central wall. The teeth are formed in a outer annular section of the steel sheet by rolling contact w... | 04/20/1993 |
| 5152061 | Cold-forming of toothed wheels from sheet steel A method of forming a toothed wheel comprising the steps of cold-forming a circular piece of sheet metal of predetermined thickness into a preform, rotating (1) a rotary holding unit with the preform secured thereto about the preform axis and with a contr... | 10/06/1992 |
| 4961353 | Gear structure Disclosed herein is a gear structure which comprises a sectoral base member of metal plate; and an arcuate flange portion integrally formed on an arcuate flange portion integrally formed on an arcuate peripheral portion of the sectoral base member. The ar... | 10/09/1990 |
| 4940937 | Pulse generating ring for electromagnetic rotary position detection A pulser ring has cylindrical inner and outer rings nested together. The inner ring is formed at its one end with protrusions arranged at equal angular intervals. The outer ring is in the shape of a round comb and has its teeth engaged at a portion near t... | 07/10/1990 |
| 4797611 | Bipartite generator wheel for an angular pulse generator The generator wheel is composed of a tooth part and of a marker part. The tooth part has a rotational axis and a coaxial tooth or toothed edge in the shape of a circular ring with teeth situated distributed over its circumference, some of said teeth being... | 01/10/1989 |
| 4632153 | Picking band wheel for a weaving machine The picking band wheel is made of a hub and two wheel discs. Each disc is provided with pocket-like spoke parts which have transverse walls at the bottom which abut the transverse walls of the other disc on a common connecting plane disposed substantially... | 12/30/1986 |
| 4630498 | Laminated wheel assembly A wheel assembly includes a cam and a cam gear mounted on a camshaft of an internal combustion engine. The cam gear is constructed of a laminated stack of flat plate members which are disposed in abutting relationship to one another to form a plurality of... | 12/23/1986 |
| 4591352 | Tension roller A tension or idler roller for a belt drive system has an outer roller for engaging a belt, an inner support body adapted to be affixed to a machine, and a rolling bearing between the outer roller and the support body. The support body is comprised of a pa... | 05/27/1986 |
| 4555240 | Pulley for cogged belt and method for producing same A pulley for use with a cogged belt, comprises first and second discs formed of sheet metal and secured with each other as a single unit, each disc being formed at its peripheral section with a plurality of teeth, the teeth of the first and second discs b... | 11/26/1985 |
| 4522080 | Laminated wheel assembly A wheel assembly includes a cam and a cam gear mounted on a camshaft of an internal combustion engine. The cam gear is constructed of a laminated stack of flat plate members which are disposed in abutting relationship to one another to form a plurality of... | 06/11/1985 |
| 4464949 | Toothed pulley of pressed sheet metal A toothed pulley of pressed sheet metal comprising a first sheet metal element which includes a cylindrical toothed rim connected to a centrally-apertured internal disc lying in a plane perpendicular to the axis of the toothed rim and substantially equidi... | 08/14/1984 |
| 4318310 | Gear crank apparatus for a bicycle A chain gear for a bicycle is formed from an approximately rectangular metallic band-shaped plate which has gear teeth formed along one edge and which is equal in length to the peripheral length of the chain gear. The band-shaped plate is wound into a rin... | 03/09/1982 |
| 4189951 | Anti-backlash gear An anti-backlash twin gear formed by a pair of identical half-gears, each fabricated by stamping a metal sheet to create a toothed wheel provided with a diametrical spoke having a central mounting bore. The arched area between one side of the spoke and on... | 02/26/1980 |
| 4143973 | Gear A composite gear of metal and plastic is provided and specifically a composite ring gear for a cement mixer. The ring gear for rotating the mixing drum of a cement mixer is commonly formed by stamping teeth in a metal flange circumjacent an intermediate p... | 03/13/1979 |
| 4134308 | Driven mechanism for a rotatory heat regenerator A driven mechanism for a rotatory heat regenerator, in which a shock absorbing member is fitted around the outer peripheral surface of a discoidal rotatory regenerator having a honeycomb structure. A metal ring having teeth is set around the outer periphe... | 01/16/1979 |
| 4131032 | Rotary drive member A sprocket gear assembly comprising a sheet metal cup-shaped sprocket member having teeth formed from the sheet metal on an annular outer portion and a central hub having splines formed therein, the hub and outer portion being separated by a radial flange... | 12/26/1978 |
| 3995498 | Wheel mounting assembly for tire balancing machine A wheel mounting assembly for a tire balancing machine of a type for rotating a wheel with a tire mounted thereon includes an annular support plate arranged to be mounted for rotation by the machine. The support plate carries means for simultaneously movi... | 12/07/1976 |