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Class Information
Number: 451/421
Name: Abrading > Attachment > To cutting machine to sharpen blade > Rotary abrading tool > Rotary reciprocating tool
Description: Machine knife sharpening attachment in which the sharpening is done by a grinder having both rotary and reciprocating motion.










Patents under this class:

Patent Number Title Of Patent Date Issued
6942553 Portable automated sharpening apparatus for an operational reel blade mechanism Sep. 13, 2005
6814652 Method to sharpen the cutting knife of a knife ring chipper Nov. 9, 2004
6699103 Mower reel blade grinding device Mar. 2, 2004
6685544 Automatic mower reel grinder Feb. 3, 2004
6561886 Device for retaining abrasive pad on lap in eyeglass lens making apparatus May. 13, 2003
6503135 Grinding device Jan. 7, 2003
6290581 Automatic mower reel grinder Sep. 18, 2001
6010394 Automatic mower reel grinder Jan. 4, 2000
5967886 Hand power tool for flat machining Oct. 19, 1999
5942037 Rotatable and translatable spray nozzle Aug. 24, 1999
5727991 Method and apparatus for in situ blade sharpening Mar. 17, 1998
5688161 Method and apparatus for sharpening and cleaning scalloped-edged blades Nov. 18, 1997
5435771 Method and apparatus for sharpening scalloped-edge blades Jul. 25, 1995
5303515 Method and device for automatically sharpening cutting blades Apr. 19, 1994
5209025 Process for sharpening the knives of a rotating drum and adjusting the fixed counter-knife cooperating therewith and device for carrying out this process May. 11, 1993
5098027 Automatic knife sharpening system for forage harvesters Mar. 24, 1992
4991476 Automatic knife sharpening method for forage harvesters Feb. 12, 1991
4834303 Sharpening apparatus for forage harvester knives May. 30, 1989
4746074 Grinding device for drum-type chopper May. 24, 1988
4718198 Apparatus for grinding cutting edges of knives in tobacco cutting machines Jan. 12, 1988
4640059 Apparatus for grinding the knives in tobacco cutting machines Feb. 3, 1987
4635402 Knife abrasive apparatus for rotary drum shaped cutter Jan. 13, 1987
4621456 Grinding machine for mowing machine cylinder blades Nov. 11, 1986
4557074 Method and apparatus for grinding undulate cutting edges of knives in tobacco cutting machines Dec. 10, 1985
4495734 Grinding arrangement for chopping cutter of drum-chopper machine Jan. 29, 1985
4393627 Reversing screw/high-low speed level wind screw Jul. 19, 1983
4321773 Rotary chopping cylinder type forage harvester having means for sharpening its shear bar Mar. 30, 1982
4306385 Involute knife sharpener Dec. 22, 1981
4195404 Cutting machine with an oscillating knife Apr. 1, 1980
4192103 Cutting reel grinder with automatic control Mar. 11, 1980
4052013 Apparatus for shredding rubber tires and other scrap materials Oct. 4, 1977
4022093 Drum opening and closing mechanism May. 10, 1977
4019287 Spiral knife sharpener Apr. 26, 1977
4010576 Apparatus for rebeveling spiral knives Mar. 8, 1977
4005554 Blade sharpening device for rotatable chopping cylinders Feb. 1, 1977
3991525 Apparatus for sharpening blades mounted on drums Nov. 16, 1976
3979076 Grinding wheel guide means for forage harvester Sep. 7, 1976
3958766 Cutterhead rotating mechanism for forage harvester May. 25, 1976











 
 
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