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| Number | Title | Issue Date |
| 8029339 | Workpiece double-disc grinding apparatus and workpiece double-disc grinding method A workpiece double-disc grinding apparatus including a holder that supports a thin-plate-like workpiece from an outer periphery along a radial direction and is rotatable; a pair of static pressure support members that support the holder from both sides along an axia... | 10/04/2011 |
| 7485029 | Double face polishing apparatus The double face polishing apparatus is capable of controlling an amount of supplying slurry to a lower polishing plate. The double face polishing apparatus comprises: a lower polishing plate and an upper polishing plate; a carrier provided between the polishing plat... | 02/03/2009 |
| 7299533 | Process for lapping ring and pinion gears A method for processing a gear set through a lapping operation that includes: providing a lapping machine tool having a first spindle and a second spindle, the second spindle being rotatable about an axis that is generally perpendicular to a rotational axis of the f... | 11/27/2007 |
| 7207870 | Seal assembly manufacturing methods and seal assemblies manufactured thereby Finishing a seal assembly as a unit is proposed, which prevents alignment of the end gaps of the annular body and the annular ring of the seal assembly, provides the ability to manufacture the seal assembly to very low tolerances, and establishes virtually perfect p... | 04/24/2007 |
| 6802763 | Apparatus for sharpening blades A sharpening apparatus with substantially rigid sharpening wheels disposed substantially fixedly on a rotatable drive shaft. An edge of a blade inserted in a slot in the apparatus comes into contact with a sharpening surface on a sharpening wheel. A sliding block as... | 10/12/2004 |
| 6676500 | Drill bit sharpener A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly... | 01/13/2004 |
| 6217423 | Apparatus and method for mirror surface grinding of magnetic disc substrate A metal bond grinding wheel 12 having a horizontal working surface 12a, a holding and rotating means 14 for a workpiece having a horizontal supporting surface 14a opposite to said working surface 12a, a voltage applying means 16 having the metal bond grin... | 04/17/2001 |
| 6139408 | Surface grinding machine and carrier used therefor In order to take a ground work W out of a work-holding hole of a carrier by chucking the outer periphery of the work W, a surface grinding machine is provided with chucking means for chucking the outer periphery of the work W by a plurality of claw member... | 10/31/2000 |
| 6113476 | Versatile ultrahone sharpener A versatile ultrahoned sharpener includes a stop assembly which contains an inner hardened structure such as being made from metal or ceramic to serve as a positive limiting stop if the knife being sharpened cuts excessively into the plastic stop assembly... | 09/05/2000 |
| 6110023 | Sphere grinding apparatus A sphere grinding apparatus (1) for grinding spheres by two discs consisting of a rotational disc (5) and a stationary disc (6), the sphere grinding apparatus (1) incorporating: a central shaft (3) slidable in an axial direction; and a housing (4) for rot... | 08/29/2000 |
| 6036585 | Grinder and grinding method A spindle 23 of a grinding wheel 28 is rotatively borne by a bench 22 for the grinding wheel through hydrostatic thrust bearings 26 and 27. A pressure regulator 38 for regulating the pressure which must be supplied to at least either of supply ports 26a a... | 03/14/2000 |
| 5967882 | Lapping apparatus and process with two opposed lapping platens An improved process for lapping a surface according to the present invention comprises: a) providing a work piece with two surfaces to be lapped, b) providing two rotatable platens, each having i) a back surface and ii) a front surface, c) providing a sheet of... | 10/19/1999 |
| 5921851 | Sphere polisher A sphere polisher capable of making uniform conditions under which balls are polished is provided. The inner and outer polishing circuits are defined by the grooves 23 provided on the rotative disc 10 and the fixed disc 20. The storage conveyor 50 is prov... | 07/13/1999 |
| 5873772 | Method for polishing the top and bottom of a semiconductor wafer simultaneously A method for polishing a semiconductor wafer is provided. A semiconductor wafer is detached from a polishing pad on a side of an upper polishing plate and is kept to be supported by a lower polishing plate. A contact area between the a wafer and the upper... | 02/23/1999 |
| 5762543 | Polishing apparatus with improved product unloading In a polishing machine for polishing parts between a table and an upper polishing head, the upper polishing head includes push rods to clear the workpieces after a polishing operation. A push ring engages the push rods as a polishing head is being raised,... | 06/09/1998 |
| 5620359 | Knife sharpener A knife sharpener (1) having a flexible grinding system includes a grinding wheel (2) and means for rotating the wheel, and has a fixed guide surface (14) for roughly positioning a knife for sharpening. A movable member (21) is disposed adjacent to the gr... | 04/15/1997 |
| 5611726 | High speed precision sharpening apparatus A high speed knife sharpening apparatus where the surface of a first rotating abrasive element is that of a truncated cone and forms a first facet with microgrooves and a microburr. A second stage is a novel composite cone shaped honing wheel made up of a... | 03/18/1997 |
| 5054243 | Brake lining grinder apparatus and method A brake lining grinder has feed wheels and an abrasion wheel defining a finishing throat through which one of a plurality of brake lining blanks are feed for simultaneously finishing the arcuate inner surface of the lining to precisely conform to the shap... | 10/08/1991 |
| 4965967 | Apparatus for low stress polishing of spherical objects Apparatus for polishing spherical objects includes first and second plates having smooth facing surfaces. A first plate comprises ceramic material which is rotatably supported, and the first plate includes a transparent plate. Spherical objects to be poli... | 10/30/1990 |
| 4938104 | Apparatus for facilitating the machining of workpieces To gain access to the cutting edge of a saw tooth in the direction of both the back and the front face of a tooth in a single grinding process, the grinding tools (27,37) are adjustable in relation to both their respective pivoted arms (2,3) and with them... | 07/03/1990 |
| 4807399 | Method and apparatus for sharpening a knife A knife sharpener is provided with a pre-sharpening section and with two honing sections. The pre-sharpening section includes a pair of spring biased back to back rotary disks. The honing sections include orbitally driven sharpening members.... | 02/28/1989 |
| 4672777 | Knife sharpening device A knife sharpening device having a base removably supporting a pair of grinding wheels at an acute angle to the horizontal. A housing encloses the base and includes a slot for receiving a knife edge, which when inserted in the housing will seat between th... | 06/16/1987 |
| 4277914 | Apparatus for grinding articles with two rotating grinding discs A grinding device for grinding the end surfaces of articles, such as cylinders or rings, comprises, first and second grinding discs which are mounted in spaced apart relationship by an amount substantially equal to the distance between the ends of the art... | 07/14/1981 |
| 4048760 | Scissors sharpener A pair of slightly peripherally overlapped and axially spaced rotary grinding members are provided and journalled for rotation about generally parallel axes of rotation. The peripheral portions of the remote axial faces of the grinding members are opposit... | 09/20/1977 |
| 4011689 | Grinding machine A grinding machine incorporating a pair of cup-shaped grinding wheels. Each grinding wheel has an annular outer beveled surface, and the blade to be sharpened is inserted between the mating beveled grinding surfaces. Each grinding wheel can be moved in an... | 03/15/1977 |
| 3984945 | Device for lapping balls in continuous operation There is disclosed a device for lapping an unlimited number of balls in continuous operation. The device has a stationary working disc and two rotary working discs which are driven in opposite direction and at differential speeds. The rotary discs and the... | 10/12/1976 |
