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Class Information
Number: 451/423
Name: Abrading > Attachment > To cutting machine to sharpen blade > Stationary abrading tool
Description: Machine knife sharpening attachment wherein the grinding means is immobile during the grinding operation (i.e., the blade being ground moves relative thereto).










Patents under this class:

Patent Number Title Of Patent Date Issued
8209837 Rotary mower blade removal and reinstallation device Jul. 3, 2012
6748836 Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials Jun. 15, 2004
6360639 Reciprocating knife sheet material cutting apparatus with knife sharpener Mar. 26, 2002
6251003 Hand-held sharpening device Jun. 26, 2001
6161453 Saw chain sharpener for a chain saw Dec. 19, 2000
6059645 Hand-held sharpening device May. 9, 2000
5924914 Rotary cutter head knife jointer Jul. 20, 1999
5797788 Grinding a mounted card clothing Aug. 25, 1998
5591072 Sharpening device for food slicer Jan. 7, 1997
5044238 Cutting and punching apparatus for sheet material Sep. 3, 1991
4663891 Method of machining a workpiece with an edge-type rotary cutting tool May. 12, 1987
4603513 Motor driven feed sharpener Aug. 5, 1986
4581856 Apparatus for high tooth equalization of cutters Apr. 15, 1986
4512114 Method for high tooth equalization of cutters Apr. 23, 1985
4509316 Lawn mower sharpener Apr. 9, 1985
4285169 Method of using vacuum lifted blade sharpener for rotary mowers Aug. 25, 1981
4246729 Sharpener for self-sharpening feed chopping knives Jan. 27, 1981
4189875 Harvester cutterhead knife sharpening device Feb. 26, 1980
4127980 Crossflow mower with automatic brake/sharpener Dec. 5, 1978
4047455 Method and apparatus for sharpening end of filament in vegetation filament-trimmer Sep. 13, 1977
4031670 Adjustable sharpener for self-sharpening feed chopping knives Jun. 28, 1977











 
 
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