Class 451/141 - Helical blade

Subclass of Class 451 - Abrading
Definition: Abrading machine specifically adapted for sharpening a cutting
No. of patents: 30
Last issue date: 01/29/2008

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Number	Title	Issue Date
7322098	Method of simultaneous two-disk processing of single-sided magnetic recording disks Various methods and apparatus for simultaneously processing two single-sided hard memory disks is provided. Disks are positioned in pairs, with one surface of one disk positioned adjacent one surface of the second disk, with the disk surfaces touching or with a slig...	01/29/2008
7275735	Fan drive for fluid cooler with evaporative heat exchanger A cooling tower and/or a fan drive system are provided which enhance cooling performance, are able to reduce lateral temperature gradients at least to some degree, provide for easy removal of debris and/or provide for easy fan adjustment. ...	10/02/2007
7242696	Digital TDMA link with no sync word The portion of TDMA frames otherwise containing the sync word is eliminated for one or more data frames at the end of a TDMA data burst to provided added bandwidth for data payload or for a reduced bandwidth. Once a communication channel has been established and is ...	07/10/2007
7207865	Apparatus for machining workpieces, in particular workpieces provided with cutting teeth In an apparatus for machining workpieces, in particular workpieces provided with cutting teeth, such as bandsaw blades or circular-saw blades for example, comprising a base (12), a machining device (18) displaceable relative to the base (12) and...	04/24/2007
7163644	CMP abrasive, liquid additive for CMP abrasive and method for polishing substrate A CMP abrasive comprising a cerium oxide slurry containing cerium oxide particles, a dispersant and water, and a liquid additive containing a dispersant and water; and a liquid additive for the CMP abrasive. A method for polishing a substrate which comprises holding...	01/16/2007
7140948	Machine for machining elongate workpieces provided with cutting teeth, in particular for grinding bandsaw blades A machine for machining bandsaw blades. A machining device, a feed device, a workpiece-fixing device and a workpiece guiding device are mounted to a common central machine block. The machining device has a rotatably driven positionable adjustable grinding wheel with...	11/28/2006
6942553	Portable automated sharpening apparatus for an operational reel blade mechanism A portable automated sharpening apparatus is structured to sharpen one or more of a plurality of blades of an operational reel blade mechanism, the apparatus including a sharpening assembly with a sharpening element movably interconnected to a sharpening motor. The ...	09/13/2005
6786806	Rotary mower blade sharpener A mower blade sharpener apparatus has an automatic reciprocating holder means to sharpen lawn mower blades conveniently with any stationary circular flat-faced grindstone with its driving motor affixed to a common base. A housing frame having open opposing sides con...	09/07/2004
6699103	Mower reel blade grinding device The present invention is a device for relief grinding a blade having a radially outer edge of an elongated length and first and second faces, with the first and second faces extending generally radially from a reel axis. The device includes a rotatable gr...	03/02/2004
6685544	Automatic mower reel grinder A grinding system (10) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head (90) mounted for movement on a carriage (92). A unique index/guide assembly (160) is mounted on the grinding head (90). The index/g...	02/03/2004
6515493	Method and apparatus for in-situ endpoint detection using electrical sensors A method and apparatus for determining the endpoint of a planarization process during chemical mechanical planarization (CMP) and more specifically for determining endpoint of a planarization process for a thin metal film deposited on a wafer's surface an...	02/04/2003
6290581	Automatic mower reel grinder A grinding system (10) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head (90) mounted for movement on a carriage (92). A unique index/guide assembly (160) is mounted on the grinding head (90). The index/g...	09/18/2001
6010394	Automatic mower reel grinder A grinding system (10) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head (90) mounted for movement on a carriage (92). A unique index/guide assembly (160) is mounted on the grinding head (90). The index/g...	01/04/2000
5879224	Reel assembly grinder with automatic indexing and grinding control A reel assembly grinder with automatic indexing and grinding control including a conventional reel assembly with a cylindrical configuration. The reel assembly has a central axial shaft with a plurality of twisted blades situated therearound in a generall...	03/09/1999
5725415	Grinding machine and method of sharpening grass mower bedknives A portable grinding machine for grinding the bottom blade or bedknife of grass mowers. The grinding machine includes a rotary grinding wheel assembly arranged for linear motion, where the wheel assembly can adjust along the blade or bedknife and grind the...	03/10/1998
5549508	Sharpening lawn mower blades Apparatus and a method for sharpening blades of a lawn mower cutting cylinder are disclosed. In the apparatus, a cutting cylinder is mounted on a fixed bed whereupon it can be subjected to the sharpening action of a grinding wheel passing along the length...	08/27/1996
5321912	Mover reel blade relief grinding device A relief grinding device (100) is disclosed including a flange assembly (106) slideably mounted on and rotatable with a grinding shaft (18) which is mounted on the free ends of pivot arms (14) pivotally mounted to a table (12). A grinding wheel (108) is m...	06/21/1994
5012617	Dual purpose grinding machine A dual purpose grinding machine for use in grinding the blades of the blade cylinder, or the bottom blade, of a cylinder type mowing machine, selectively. The machine has a grinding wheel head with a cylindrical grinding wheel and a cupped grinding wheel,...	05/07/1991
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
4694613	Relief grinding of lawn mower cylindrical blades In a grinding machine for relief grinding the blades of a lawn mower blade cylinder having a rotatable drive shaft (14) on which a grinding wheel (20) is mounted for rotation therewith and for axial movement therealong, a grinding wheel guide assembly (30...	09/22/1987
4621456	Grinding machine for mowing machine cylinder blades A grinding machine for cylinder type mowing machine blades, the machine including an arrangement for indexing the blade cylinder around from one blade to the next so that it can be completely relief ground in one operation without the intervention of an o...	11/11/1986
4550532	Automated machining method Disclosed is a process which produces precision ground articles such as tungsten carbide burs without the use of skilled craftsmen. An automatic apparatus is described which is capable of performing the motions necessary to produce a machined given object...	11/05/1985
4502456	Apparatus for dressing grinding wheels A grinding machine wherein the grinding wheel has a profile consisting of recurrent identical sections, as considered in the axial direction of the grinding wheel. The profile of the grinding wheel is treated by a dressing tool whose profile is that of a ...	03/05/1985
4485591	Blade grinding machine for reel type mowers A grinding machine for releasable attachment to reel type mower units for the sharpening of the cutting components thereof. This grinding machine has a base which rests upon the ground with extensions therefrom for releasable attachment to the mower unit....	12/04/1984
4484931	Thread grinder A machine for grinding threads on a workpiece which is rotated in a workhead while the workhead is reciprocated by a table under a grinding wheel to form threads in the workpiece. To improve the accuracy with which the threads are formed, the workpiece an...	11/27/1984
4460297	Orbital method and apparatus for making helical races Cutting apparatus forms helical races in a workpiece defining a toroidal envelope having an axis of symmetry and a circular axis perpendicular to the axis of symmetry and defining a diametric plane through the envelope by rotating the workpiece about the ...	07/17/1984
4192103	Cutting reel grinder with automatic control A cutting reel grinder is disclosed which includes an automatic control for operating the grinding device as well as an indexing device that advances cutter reel knives for sharpening by the grinding device. The control includes a pair of electrical actua...	03/11/1980
4163345	Arrangement for the grinding of rotary profile cutters An arrangement for the grinding and cutting of rotary profile cutters having, in combination mounted on a base, a first reciprocable table on which is mounted a rotatable platen. A rotatable workpiece carrier assembly is fixed to the platen and these have...	08/07/1979
4148158	Lawn mower blade grinder A device is disclosed for grinding the blades of a lawn mower unit without disassembling the lawn mower blade reel from its supporting structure. The device is capable of both single blade grinding and spin grinding and is adjustable so that virtually any...	04/10/1979
4064657	Machine for machining spiral cutting edges on cutting tools A machine for machining a spiral cutting edge on an elongate workpiece having a rounded head by moving the workpiece relative to a rotating tool comprises a support unit mounted for vertical translational movement and rotation about a vertical axis. The s...	12/27/1977

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Class 451/141 - Helical blade