Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7302310 | Machining stock and part offset control One or more embodiments of the presently preferred invention provides a method and a computer-program product for generating a boundary path from a part geometry and a part boundary, where the part boundary is parametrically associated with the part geometry such th... | 11/27/2007 |
| 7219408 | Tool for securing a component A method enables a component to be secured within a tool for manufacture. The tool includes a fixture, a component locator, and a clamping member. The method includes fixedly coupling the component locator to the fixture, coupling the clamping member to the fixture,... | 05/22/2007 |
| 7134936 | Grinding head for a grinding machine for glass slabs, and machine equipped with such head A grinding machine (1) for glass slabs (2) comprising a grinding head (77) that comprises a supporting structure (9), grinding wheels (20, 28) for grinding and polishing the edge of the slab (2), and grinding wheels (24, ... | 11/14/2006 |
| 7100269 | Method of manufacturing slider of thin-film magnetic head A slider comprises a slider section and an element section. The slider section has a first medium facing surface and an air inflow end. The element section has a second medium facing surface, an air outflow end, and a thin-film magnetic head element. The slider sect... | 09/05/2006 |
| 7082669 | Method of manufacturing a substrate of a rotary encoder A two-phase rotary encoder is provided which includes a substrate for the encoder which is double-faced and has a copper-foil-bonded substrate etched thereon, a first ring-shaped electrode pattern and a second ring-shaped electrode pattern formed concentrically arou... | 08/01/2006 |
| 7082671 | Magnetic disc apparatus production method A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling fine spacing and high track posit... | 08/01/2006 |
| 7082672 | Method of manufacturing thin-film magnetic head A thin-film magnetic head comprises a top pole layer incorporating a throat height defining layer and a yoke portion layer. The throat height defining layer is formed as follows. A magnetic layer to be a track width defining portion is formed on a recording gap laye... | 08/01/2006 |
| 7047625 | Planarizing process Present processes used for planarizing a cavity filled with a coil and hard baked photoresist require that a significant amount of the thickness of the coils be removed. This increases the DC resistance of the coil. In the present invention, cavity and coil are over... | 05/23/2006 |
| 7007374 | Method of making a magnetic head A narrow track width read sensor having a high magnetoresistive sensitivity is made using a self-aligned process which requires the use of only a single resist mask. A plurality of sensor layers is deposited over a substrate. After forming a resist mask in the centr... | 03/07/2006 |
| 7004816 | Grinding method for vertical type of double disk surface grinding machine A grinding method for a vertical type of double disk surface grinding machine comprising a pair of rotating grinding wheels vertically opposed to each other and vertically movable and a moving table for moving a work having a work holding jig, wherein vertical posit... | 02/28/2006 |
| 6988308 | Method of initializing hard bias of a magnetic read head Hard biasing of a magnetoresistive sensor or a spin valve sensor in a magnetic read head is initialized by repeatedly applying a magnetic field to the hard biasing at any level of fabrication of the magnetic read head or any combination of levels of fabrication of t... | 01/24/2006 |
| 6976900 | Automatic roll data acquisition system The present invention discloses a method, system and apparatus for use in a roll grinding machine. Data is read from an RFID tag automatically by providing an RF read/write sensor on a movable cylinder rod. The RF sensor is held away from the work roll area while th... | 12/20/2005 |
| 6955583 | Apparatus for the diameter checking of eccentric portions of a mechanical piece in the course of the machining in a grinding machine An apparatus (10) for checking the diameter of an eccentric pin (8′) of a small-size shaft (8), for example a shaft for compressors, includes a support (16), a first arm (19) rotating with respect to the support (16), a se... | 10/18/2005 |
| 6951511 | Platen with peripheral frame for supporting a web of polishing material in a chemical mechanical planarization system Generally, a method and apparatus for supporting a web of polishing material. In one embodiment, the apparatus includes a platen adapted to support the web, a frame assembly, and one or more flexures coupled between the platen and the frame assembly. The flexure all... | 10/04/2005 |
| 6951507 | Substrate polishing apparatus A chemical mechanical polishing apparatus includes a rotating plate on which a substrate received, and a polishing pad which moves across the substrate as it rotates on the plate to polish the substrate. The load of the pad against the substrate, and the rotary spee... | 10/04/2005 |
| 6829819 | Method of forming a magnetoresistive device A magnetoresistive device having a first pole, a second pole, and a first tapered pole pedestal therebetween and magnetically connected to the second pole. The first tapered pole has a width that increases with increasing distance away from the air bearing surface, ... | 12/14/2004 |
| 6716084 | Carrier head for holding a wafer and allowing processing on a front face thereof to occur The present invention uses some type of inflatable membrane during processing to establish a vacuum and/or provide a resilient cushion on which the backside of the wafer can rest. In one aspect, the present invention provides an outer vacuum that allow for attachmen... | 04/06/2004 |
| 6497798 | Controllably monitoring and reducing a material The instant invention provides a vibration insensitive method of precisely polishing an object. The method includes the steps of providing an object to be polished, applying a conductive material to a non-electrical current conductive surface of the objec... | 12/24/2002 |
| 6482072 | Method and apparatus for providing and controlling delivery of a web of polishing material Generally, a method and apparatus for supporting a web of polishing material. In one embodiment, the apparatus includes a platen adapted to support the web, a frame assembly, and one or more flexures coupled between the platen and the frame assembly. The ... | 11/19/2002 |
| 6346029 | Bow compensated lapping A method and apparatus for controlling the amount of row distortion before and dynamically during the lapping process used to manufacture sliders for magnetic storage devices. A wafer quadrant of slider rows is bonded to an extender tool held in a carrier... | 02/12/2002 |
| 6244927 | Multi-functional sensing methods and apparatus therefor A method and apparatus for sensing a pierce-through condition of a material made by a piercing force in which a shield surrounding a source of the piercing force is supplied with a gas supply to create a pressure within the shield means. A decrease in pre... | 06/12/2001 |
| 6199956 | Round-shank bit for a coal cutting machine A round-shank bit for a coal cutting machine or the like, having a bit head and a bit shank, wherein the bit head has a bit tip, maintained by a base element in a receptacle of the bit head. Starting at the base element, the bit tip tapers in a direction ... | 03/13/2001 |
| 6179956 | Method and apparatus for using across wafer back pressure differentials to influence the performance of chemical mechanical polishing Methods and apparatus for planarizing the surface of a semiconductor wafer by applying non-uniform pressure distributions across the back side of the wafer are disclosed. According to one aspect of the present invention, a chemical mechanical polishing ap... | 01/30/2001 |
| 6174218 | Bow compensated lapping A method and apparatus for controlling the amount of row distortion before and dynamically during the lapping process used to manufacture sliders for magnetic storage devices. A wafer quadrant of slider rows is bonded to an extender tool held in a carrier... | 01/16/2001 |
| 5898984 | Cylinder member holder, machining apparatus having said holder, and machining method using same A cylinder member holder is used to subject the outer circumferential surface of a cylinder member to cutting machining by non-rotatably supporting left and right ends of a tubular cylinder member by left and right holders and feeding a cutting tool longi... | 05/04/1999 |
| 5146670 | Profiling and deburring of workpieces The invention is directed to a device and method for profiling and deburring a workpiece. The device includes a profiler having a cutting edge for profiling a workpiece, a deburrer having a cutting edge for deburring profiled edges of a workpiece, and a y... | 09/15/1992 |
| 4963805 | Numerical control apparatus for machining non-circular workpieces A numerical control apparatus for machining non-circular workpieces such as a cam and the like has been disclosed. The cam and the like are used in changing the operation from rotational to linear motion. In designing the shape of the cam and the like, li... | 10/16/1990 |
| 4926102 | Involute interpolation method An involute interpolation method for machining operations is used in a numerical control apparatus. A rotational direction (G03.1) of an involute curve, an incremental distance along the involute curve or an incremental angle, a center position (X0 | 05/15/1990 |
| 4905417 | Numerical control grinding machine In a numerical control grinding machine using a grinding wheel made of cubic boron nitride, a computerized numerical controller controls the infeed movement of a wheel head to effect a rough grinding, a drifty grinding and a fine grinding on a rotating cy... | 03/06/1990 |
| 4810945 | Numerical control feed device for machine tool In a numerical control feed device, an objective velocity signal is produced from the difference between command pulses from a numerical controller, which indicative of an objective feed amount and an objective feed rate for a slide of a machine tool, and... | 03/07/1989 |
| 4615149 | Feed control apparatus for grinding machine A feed control apparatus for a numerically controlled grinding machine having a work table movable in a first axis direction, a wheel head provided thereon with a grinding wheel of the angular type and movable in a second axis direction perpendicular to t... | 10/07/1986 |
| 4607460 | Grinding machine with a reciprocable column for work supporting devices A numerically controlled profile grinding machine has a bed for a first carriage which supports an upright column and is reciprocable along a first horizontal path. The column supports a second carriage which is reciprocable thereon along a vertical secon... | 08/26/1986 |
| 4458452 | Control for grinding machine A control for a grinding machine of the type having a grinding wheel mounted at an oblique angle relative to a workpiece, the control including means for receiving first data representative of a contour to be ground on the workpiece defined in a first set... | 07/10/1984 |
| 4375738 | Method for grinding glass plate and the like by numerical control and grinding machine therefor A grinding machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causi... | 03/08/1983 |
| 4367389 | EDM System with abrasive finisher An electrical discharge machining (EDM) apparatus is rendered capable of finishing machined workpiece surfaces by mounting an abrasive tool assembly on an electrode tool head juxtaposed with the machined workpiece as it is positioned fixedly on an EDM wor... | 01/04/1983 |
| 4299061 | Cam machine with acceleration control The invention provides apparatus and a method for use in machining cam profiles, and is suitable for use in grinding, milling, turning or otherwise forming cams. A workpiece, i.e. a cam blank, is rotated adjacent a machine tool (e.g. a grinding wheel) and... | 11/10/1981 |
| 4294047 | Method of sharpening lateral edges and end edges of a blade during reciprocation thereof The leading and lower cutting edges of a reciprocating cutting blade on a sheet material cutting apparatus are sharpened by elevating the blade from a cutting region proximate the sheet material supporting surface of the apparatus to a sharpening region a... | 10/13/1981 |
| 4228617 | Method for grinding glass plates and the like through numerical control and beveling machine therefor A beveling machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causi... | 10/21/1980 |
| 4186529 | Programmably controlled method for grinding end cutting tools and the like Disclosed is a numerically controlled method of broad application but particularly useful for grinding cutting edges and clearance surfaces on cutting tools such as end mills and other similar tools. A programmable numerical servo-motor type control is de... | 02/05/1980 |
| 4148159 | Grinding machine A grinding machine in which the grinding cycle is controlled by a stepping motor which receives pulses from a linear feed-controlled generator and which is operative to give an adjustable diamond clearance.... | 04/10/1979 |
