Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7357132 | Positioning system and method of orienting an object using same A system (22) for orienting an object (28) relative to a base (24) to which the object (28) is rotatably coupled includes a braking surface (46) in fixed relation with the base (24). A brake (48) is engaged with the b... | 04/15/2008 |
| 7341501 | Gear grinding machine, method for dressing threaded grinding wheel and method for grinding work A gear grinding machine, a method for dressing a threaded grinding wheel, and a method for grinding a work are disclosed. A dressing tool is rotated in a vertical plane, with its position being fixed. The position of a threaded grinding wheel is NC-controlled, where... | 03/11/2008 |
| 7169023 | Method and apparatus for manufacturing hourglass worm rolling die An apparatus manufactures a die for rolling an hourglass worm in improved processing accuracy. The apparatus includes a swing table swung, a movement table mounted on the swing table, and a workpiece shaft arranged on the movement table. The axis of a disk-shaped wo... | 01/30/2007 |
| 6979253 | Work drive for continuous generation gear grinding machine The gear train of a work drive system on a machine for the continuous grinding of gears, with which by means of non-integer transmission ratio between work spindle (3) and drive motor (4) as well as a high number of teeth on the cylindrical gear (6 | 12/27/2005 |
| 6964215 | Rotary positioning multi-faced tooling fixture and associated methods A tooling fixture for rotatably positioning a plurality of workpieces includes a base and a housing carried by the base. A plurality of workpiece spindles are carried by the housing. The tooling fixture also includes a spindle drive assembly for rotatably positionin... | 11/15/2005 |
| 6923712 | Method and apparatus for grinding rotors for hydraulic motors and apparatus therefor A fixture for selectively locating and retaining hydraulic gerotor rotors in position in respect to a grinding wheel, the fixture clamping the rotor between two oversized positioning rolls located in rotor lobe valleys on opposite sides of the rotor. ... | 08/02/2005 |
| 6805617 | Process for the fine machining of the toothed gears of a gearbox The process describes how transmission gears (6) can be manufactured in a highly economical and highly precise manner. In one single mounting, the complete hard fine-machining on all of the most important functional surfaces of the workpiece is conducted simu... | 10/19/2004 |
| 6796877 | Abrading machine A machine for abrading or polishing a workpiece comprises a holding surface holding the workpiece, a head member arranged along a rotation axis to rotate about the rotation axis, a working member having a surface for abrading or polishing the workpiece arranged on t... | 09/28/2004 |
| 6709318 | Dual-grinding method for bar blades and grinding disc for carrying out said method A grinding wheel and a method for grinding bar blade for the production of spiral gear teeth are described. For economical grinding of such bar blades the grinding wheel has a conical grinding surface (Pp) widening from a small diameter (d1) to a large diamet... | 03/23/2004 |
| 6575812 | Setting up process for a tool or workpiece on a gear making machine Determining of the starting and end positions of the machining programme of a gear making machine with respect to the axial position of the workpiece (11, 18) by means of a laser light line (14) projected at right angles to the workpiece axis, the positio... | 06/10/2003 |
| 6425807 | Method and apparatus for grinding rotors for hydraulic motors and apparatus therefor A fixture for selectively locating and retaining hydraulic gerotor rotors in position in respect to a grinding wheel, the fixture clamping the rotor between two oversized positioning rolls located in rotor lobe valleys on opposite sides of the rotor.... | 07/30/2002 |
| 6422924 | Process for widening the crown of cylindrical-type gears by continuous diagonal hobbing Desired crown width and offset can be obtained on the workpiece in a simple manner and with geometrically simple tools, by adjustment of tool lead modification, the axial spacing between tool and workpiece, or the angle of rotation. Tooth flanks modified ... | 07/23/2002 |
| 6386953 | Topological profiling of grinding worms for continuous generating grinding of gear teeth A profiling tool (4) is used for profiling or dressing the grinding worm thread, wherein said tool has a simple basic geometric shape, for example in the shape of a rod. The profiling tool (4) has on its active, abrasive surface (6, 7, 8) a transformed to... | 05/14/2002 |
| 6350181 | Process and device for the fine machining of the toothed gears of a gearbox The process describes how transmission gears (6) can be manufactured in a highly economical and highly precise manner. In one single mounting, the complete hard fine-machining on all of the most important functional surfaces of the workpiece is conducted ... | 02/26/2002 |
| 6227775 | Internal gears and splines and milling method and apparatus for manufacturing same An apparatus and method for milling internal gears and splines using a pair of opposed milling cutters disposed internally in a gear or spline blank. The apparatus generally milling gear teeth on generally opposite sides of the blank with an indexing mech... | 05/08/2001 |
| 6217409 | Threaded grinding wheel and method of dressing A method of dressing a threaded grinding wheel such that twisting of workpiece tooth flanks does not occur during grinding. The grinding wheel is preferably dressed with a circular arc hollow-crowned generating front with the generating front being descri... | 04/17/2001 |
| 6077150 | Profiling methods for generation of modified grinding worms Method and an apparatus for the profiling of single-gear or multiple-gear grinding worms for grinding tooth profiles in accordance with the principle of continuous diagonal hob grinding. A grinding worm is divided into at least two axial segments wherein ... | 06/20/2000 |
| 5957762 | Internally toothed tool for the precision machining of gear wheels A method for the precision machining of flanks of gear-wheel-shaped workpieces, in particular those with convex teeth, using an internally toothed tool with crossed axes, in which simultaneous relative movements take place not only in three mutually perpe... | 09/28/1999 |
| 5954568 | Method, tool and device for the profiling of grinding worms for continuous gear grinding The profiling tool (10) has a segment (12) of a worm thread. Its active zone (13) is coated with grains of hard material (16) and is crowned in cylinder sections coaxial to the tool axis (26). During profiling, the grinding spindle (2) and the tool (10) r... | 09/21/1999 |
| 5885038 | Machine for finishing the tooth flanks of gear-shaped workpieces with an internal gear tool Machine comprising a main frame (1), machine bed (2), headstock (3) and tailstock (4) with means (17, 18) for mounting of the work for rotation about a work axis (C2), the means being disposed on the machine bed, with the headstock being movable in a dire... | 03/23/1999 |
| 5800103 | Method of machining during indexing A method of machining one or more tooth slots in a bevel gear-shaped workpiece with a cup-shaped tool having one or more stock removing surfaces. The method comprises indexing the workpiece by rotation about a workpiece axis to bring one of the tooth slot... | 09/01/1998 |
| 5765974 | Method for machining tooth flanks of workpieces with a profiled shaped tool A method for machining of tooth flanks by grinding or milling respectively as to internally or externally toothed workpieces with a profile disk tool in a discontinuous indexing process. For generating flanks with complicated flank modifications it is pro... | 06/16/1998 |
| 5720584 | Tool for producing a crown wheel which can mesh with a pinion with oblique teeth, and method of producing such a crown wheel In the production of a crown wheel which can mesh with a cylindrical pinion if the axes of rotation of the crown wheel and the pinion are not parallel, the workpiece from which the crown wheel is produced and a generating tool rotate at a ratio in the spe... | 02/24/1998 |
| 5681207 | Method of working a helical gear by grinding In forming a helical gear by grinding with a grindstone, the modification accuracy of crowing etc. is improved in such a way that the inequality ଲ>γ c is established wherein ଲ is the helix angle of the helical gear to be ground and γ c is th... | 10/28/1997 |
| 5443338 | Machine for the precision working of the tooth flanks of gear-shaped workpieces with an internally toothed tool A machine for the precision working of tooth flanks of a gear-shaped workpiece. The machine having an internally toothed tool, a tool head angularly adjustable about an axis directed transversely with respect to a workpiece axis for rotationally drivably ... | 08/22/1995 |
| 5413520 | Method and apparatus for fine machining of spur gears The conical internal teeth (7) of a spur gear grinding tool (2) mesh with the teeth (6) of a spur gear workpiece (1) or a dressing spur gear. The tool axis (4) forms an acute angle (γ) with the workpiece axis (3). To grind and to dress, the spur gear too... | 05/09/1995 |
| 5175962 | Method of and apparatus for machining spur and helical gears Disclosed herein is a process and apparatus for grinding tooth surfaces of spur and helical gears by a generating method. The outer tooth surfaces of a theoretical ring gear are conjugate to the grinding surfaces along the width of a generally hourglass s... | 01/05/1993 |
| 5119594 | Grinding machine for continuous roll grinding of gears A grinding machine for continuous roll grinding of gears having a workpiece (6) clamped on a bench (1) and a grinding worm (8), the rotary drives of which are connected by a play-free mechanical hypoid transmission. The grinding worm (8) is continuously d... | 06/09/1992 |
| 5044127 | Gear-shaped tool and method of generating gears A gear-shaped tool (30) having stock removing surfaces (38) is rotated together with a bevel or hypoid work gear (32) in accordance with their respective number of teeth, and the gear-shaped tool 30 is also moved relative to the work gear (32) in the mann... | 09/03/1991 |
| 4955163 | Method for production of involute gear tooth flanks A method is disclosed in which only one working point or machining point on a machining tool, which in general can comprise a grinding wheel or disc, is in machining contact with a workpiece such as a gear blank during a machining operation. The position ... | 09/11/1990 |
| 4950112 | Machine for the precision working of the tooth flanks of toothed workpieces A machine for the precision working of the tooth flanks of toothed workpieces with a gearlike tool, for example, a shaving gear or the like, which is in a two-flank generating engagement with a workpiece. The workpiece is supported stationarily, however, ... | 08/21/1990 |
| 4947590 | Method for the precision working of crowned tooth flanks on particularly hardened gears A method for the precision working of crowned tooth flanks of particularly hardened gears with a two-flank abutment and at crossed axes with an abrasive gear-shaped or rack-shaped tool, in which the tool carries out several back and forth feed movements r... | 08/14/1990 |
| 4920703 | Method and apparatus for finishing a tooth surface of a gear A workpiece and master gears are engaged each other and at least one of the workpiece and master gears is relatively rocked in a manner such that the relative rock movement of the master gear does not interfere substantially beyond an involute line of the... | 05/01/1990 |
| 4848040 | Apparatus for grinding shaving cutter teeth, and method of same A tooth grinding apparatus uses a cutter grinder to regrind the tooth surfaces of a shaving cutter adapted to cut gear workpieces, the regrinding being performed whenever the tooth surfaces of the shaving cutter become worn. A plurality of tooth grinding ... | 07/18/1989 |
| 4817338 | Grinding head for a machine for grinding helically grooved cutting tools A grinding head for a tool grinding machine is used for grinding helically grooved cutting tools. The grinding head includes a rotatable spindle supported by adjustable carriages or slides so that it can be reciprocated along one axis and pivoted about an... | 04/04/1989 |
| 4815239 | Apparatus for production of involute gear tooth flanks An apparatus is disclosed in which only one working point or machining point on a machining tool, which in general can comprise a grinding wheel or disc, is in machining contact with a workpiece such as a gear blank during a machining operation. The posit... | 03/28/1989 |
| 4811528 | Method for production of envolute gear tooth flanks A method and apparatus are disclosed in which only one working point or machining point on a machining tool, which machining contact with a workpiece such as a gear blank during a machining operation. The position of this single working or machining point... | 03/14/1989 |
| 4798504 | Workpiece machining apparatus and method Formations on a workpiece (1) are machined along an arcuate path (5) having a center (4) in eccentrically spaced relation to a rotational axis (3) about which the workpiece is indexed by a holder (2). A tool (7) is controllably displaced through its carri... | 01/17/1989 |
| 4780990 | Machine and process for forming longitudinally curved tooth gears A method and machine for forming longitudinally curved tooth surfaces in bevel and hypoid gears. A dish-shaped grinding wheel 26 is rotated about its axis 76 and oscillated about a cradle axis 66 in a timed relationship with a relative reciprocation of a ... | 11/01/1988 |
| 4750848 | Involute gear cutter A gear cutter is provided as an accessory to a milling machine. A single gear cutting blade makes successive passes across a continuously rotating gear blank to cut a desired number of gear teeth. The cycle time of the cutting blade and the angular veloci... | 06/14/1988 |
