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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7413503 | Elastic polishing tool and lens polishing method An elastic polishing tool that comes into contact with a surface to be polished of a lens and rotates to polish the surface, includes: an elastic polishing body which has a cylindrical shape and whose shape can be changed according to the surface to be polished; and... | 08/19/2008 |
| 7217176 | Polishing tool with several pressure zones The invention refers to a polishing tool for optical lenses with at least one polishing pad adaptable at least partially to the shape of a lens surface of said lenses and drivable by means of a drive shaft, said polishing pad having a membrane, wherein said polishin... | 05/15/2007 |
| 7118452 | Pneumatically actuated flexible coupling end effectors for lapping/polishing Methods and apparatus for end effectors for performing surface lapping using a robotic system are provided. In one embodiment, a lapping system includes a robotic arm and a pneumatic end effector unit. The pneumatic end effector unit includes a first base attached t... | 10/10/2006 |
| 7066794 | Tool for fine machining of optically active surfaces A tool (10) is disclosed for fine machining of optically active surfaces (F), with a base body (12) that can be attached to a tool spindle of a machine tool, and an elastic membrane (14) that has a machining section (16) to which connects... | 06/27/2006 |
| 7029371 | Jig for guiding a grinder A jig is structured to guide a grinder along the inner surface of the base or cover of a combustion turbine. The jig includes a base having a bottom surface with a plurality of rollers arranged in substantially the same radius as the portion of the casing being repa... | 04/18/2006 |
| 6976903 | Apparatus for controlling retaining ring and wafer head tilt for chemical mechanical polishing A CMP system accurately measures eccentric forces applied to carriers for wafer or polishing pad conditioning pucks. An initial coaxial relationship between wafer axis of rotation and a carrier axis is maintained during application of the eccentric force, such that ... | 12/20/2005 |
| 6846230 | Manual machine tool In a hand power tool for surface machining, with a vibrating plate, which is suspended on a housing by vibrating elements, and with an electromotively driven eccentric drive, which is contained in the housing and sets the vibrating plate into an orbital oscillating ... | 01/25/2005 |
| 6767275 | Machining apparatus for workpiece and method therefor To provide an apparatus that may impart a complicated bend deformation to an object to be machined such as a ceramic bar elongated in one direction or the like, and may reduce the non-uniformity in machining amount of the object to be machined upon the machining wor... | 07/27/2004 |
| 6623336 | Magnetic head polishing device and method thereof When electric elements are formed on a ceramic bar or the like, the positional displacement of the respective elements occurs due to a division exposing process or the like. An object of the present invention is to provide a device and a method which unif... | 09/23/2003 |
| 6616511 | Rolling mill equipped with on-line roll grinding system and grinding wheel A grinding head unit is constituted by a grinding wheel, a drive device for rotating the grinding wheel, and a movement device for moving the grinding wheel. When vibration of a mill roll is applied to the grinding wheel, a plain wheel integral with an ab... | 09/09/2003 |
| 6358117 | Processing method for a wafer A surface grinding method is provided by which grinding striations are produced so that the striations can fully be removed by a polish-off amount less than required in a conventional way in mirror polishing following surface grinding using an infeed type... | 03/19/2002 |
| 6358114 | Method and apparatus for optical polishing A lapping tool for localized optical polishing of a workpiece, the tool having a flexible working surface and being characterized by means for selectively varying the pressure applied, in use, on the workpiece by different regions of the tool working surf... | 03/19/2002 |
| 6264538 | Edge-finishing machine This invention provides an improved machine for finishing the edges of glass or other brittle materials. The machine is distinguished by its few moving parts, and its ease of maintenance. The edge-finishing machine includes a main conveyor section includi... | 07/24/2001 |
| 6039631 | Polishing method, abrasive material, and polishing apparatus Disclosed is a polishing method including the step of: polishing a surface of a member to be polished by rotating and sliding an abrasive wheel holding fixed abrasive grains on the surface of the wheel while supplying free abrasive grains to the surface o... | 03/21/2000 |
| 5816893 | Method and device for sharpening tools, particularly dental hand instruments A method and apparatus for sharpening tools, particularly hand instruments used in dental care. The apparatus includes a fixed base (19) and a rotary plate (14) fitted thereon, a grinding stone (10) pivoted on an axle (11), and a motor (20) for rotating t... | 10/06/1998 |
| 5785578 | Equipment for the grinding of material samples Equipment for the grinding of material samples includes a console and a frame structure. A turntable is mounted on the console and frame structure, with the turntable having a material sample holding portion capable of releasably holding a plurality of ma... | 07/28/1998 |
| 5549502 | Polishing apparatus A grinding method and apparatus having a position aligning mechanism to correctly achieve the centering of each work on a work table and locate an orientation flat part of each work at a predetermined position, and a displacing mechanism for reciprocally ... | 08/27/1996 |
| 5542874 | Wafer polishing apparatus A wafer polishing apparatus has a wafer chuck for holding a wafer with a surface to be polished directed upward, the wafer chuck being rotatable by a wafer chuck rotation motor; a pair of nozzles for supplying slurries used as polishing solutions to the w... | 08/06/1996 |
| 5283982 | Complex contour milling machine The milling machine disclosed herein offers significant advantages over prior milling machines, particularly in the field of milling composite panels. The structure of the milling machine, having a C-shaped frame with a clamping mechanism that cooperates ... | 02/08/1994 |
| 4833832 | Production of polished flat glass A method of polishing a glass sheet which includes the steps of supporting the glass sheet in a substantially horizontal position with one of its major faces uppermost, providing a substantially horizontal gantry (11) supported so that it can be traversed... | 05/30/1989 |
| 4771576 | Apparatus and methods for finishing a level surface Apparatus for abrading the surface of a workpiece in a manner level with a selected reference plane, e.g. a horizontal reference plane. The apparatus includes a wheeled carriage to which is connected an elongated boom. Extending downward from the end of t... | 09/20/1988 |
| 4751794 | In-track rail base grinding apparatus For grinding use on the base underside of continuous in-track welded rail type track defining a railroad right of way, for removing rail excess weld metal from the underside of the rail base, at the weld joint thereof, after ballast has been sufficiently ... | 06/21/1988 |
| 4635340 | Method of machining a workpiece in a turret lathe and an NC lathe for performing this method A method of machining a workpiece, which is rotatable about a first axis, by a tool pivotable about a second axis parallel to the first axis and drivable about a third axis perpendicular to the second axis. To allow the circumference of the workpiece to b... | 01/13/1987 |
| 4294042 | Apparatus and method for grinding a helical surface on a flat blade Apparatus for grinding a helical cutting surface on a flat cutting blade. Prior art grinders are complex, difficult to operate and expensive to use. The present grinding machine comprises a stationary support (74), a grinding arbor (76), an adjustable cam... | 10/13/1981 |
| 4222203 | Machining device and method A method and device for machining the tappet collars of the inner rings of roller bearings by means of a frusto-conical cup wheel is proposed wherein such cup wheel is adjustable in the axial direction of the workpiece into engagement with the surface to ... | 09/16/1980 |
| 4128968 | Optical surface polisher An apparatus for precisely polishing an optical surface is described. The apparatus includes polishing pads which are small in size in comparison with the surface being polished. The pads are maintained in contact with and moved across the surface being p... | 12/12/1978 |
| 3974595 | Gear grinding machine for spiral bevel gears A gear grinding machine for forming spiral bevel gear teeth grinds a curved flank of a tooth in a continuously rotating bevel gear wheel. A slider carrying a grinding disk is adjustably guided on a slide reciprocating along the flank of a tooth at right a... | 08/17/1976 |