Class 451/421 - Rotary reciprocating tool

Subclass of Class 451 - Abrading
Definition: Machine knife sharpening attachment in which the sharpening
No. of patents: 40
Last issue date: 07/03/2007

Number	Title	Issue Date
7238096	Orbital rotary blade sharpener An orbital rotary blade sharpener for sharpening rotary cutter blades and other rotary blades includes a bottom blade holding portion having a center and a perimeter edge, a top blade holding portion rotatably connectable to said bottom blade holding portion, having...	07/03/2007
7146788	Chopper arrangement for a forage harvester A forage harvester chopper arrangement is located within a housing provided with an access door mounted for pivoting vertically between a chopping position, wherein access to the chopping arrangement is prevented, and a grinding position, permitting access to the ch...	12/12/2006
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
6814652	Method to sharpen the cutting knife of a knife ring chipper A method for sharpening the cutting knives of a knife ring chipper, which includes a knife ring and a number of knife units, the units in turn containing knives and holding plates. The knife ring is removed from the knife ring chipper, the knife units of the knife r...	11/09/2004
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
6561886	Device for retaining abrasive pad on lap in eyeglass lens making apparatus A retainer for retaining an abrasive pad on a lens making machine and an abrasive pad adapted to such retention comprises a retainer nestable with a lap of a lens making machine wherein when such retainer is nested, a pad placed upon the lap before nestin...	05/13/2003
6503135	Grinding device A chopper drum includes a plurality of knives distributed along its width and about its circumference. A grinding device is provided for automatically sharpening the knives, with a grinding stone of the grinding device having its movement automatically co...	01/07/2003
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
5967886	Hand power tool for flat machining A hand power tool for flat machining has a machine housing, a motor accommodated in the machine housing, a toolholder mounted on the housing, a moveable tool carried by the toolholder and formed as a grinding plate with a triangular base surface for recei...	10/19/1999
5942037	Rotatable and translatable spray nozzle A nozzle having a series of orifices along a longitudinal length of the nozzle for processing a substrate and which is rotatably adjustable. By the nozzle design of the present invention, liquid is properly distributed along the longitudinal length of the...	08/24/1999
5727991	Method and apparatus for in situ blade sharpening An apparatus and method for sharpening machine tool cutter blades in situ is disclosed. A connector adjustably connects a powered sharpening device to the apparatus. Further adjustment of the apparatus relative to the blades is provided by a body member m...	03/17/1998
5688161	Method and apparatus for sharpening and cleaning scalloped-edged blades A sharpening and cleaning apparatus for sharpening scalloped-edged blades in a carton slitting machine includes at least two rotating cylindrical hones mounted on a pneumatically controlled actuator, and a pair of blade cleaning brushes mounted on a separ...	11/18/1997
5435771	Method and apparatus for sharpening scalloped-edge blades A sharpening apparatus for sharpening scalloped-edged blades in a carton slitting machine includes at least two rotating cylindrical hones mounted on a pneumatically controlled actuator. A sharpening operation is initiated by a machine operator as needed ...	07/25/1995
5303515	Method and device for automatically sharpening cutting blades The device for sharpening a cutting blade presenting a sharp edge includes at least one grinding wheel provided at least on the surface with abrasive material. The grinding wheel has a cylindrical body presenting a V-sectioned peripheral groove, and is mo...	04/19/1994
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 In a fodder harvesting machine, the device disclosed comprises a rotating chopping drum (1) and a fixed counter-knife (25) cooperating with the knives (2) of the drum (1), as well as a retractable wheel (21) adapted to be moved in rotation in order period...	05/11/1993
5098027	Automatic knife sharpening system for forage harvesters In a forage harvester having a motor driven sharpening stone driven back and forth along a path parallel to the axis of a rotating cutterhead to sharpen the knives of the cutterhead, and a door which normally prevents access to the knives, a control circu...	03/24/1992
4991476	Automatic knife sharpening method for forage harvesters In a forage harvester having a motor driven sharpening stone driven back and forth along a path parallel to the axis of a rotating cutterhead to sharpen the knives of the cutterhead, and a door which normally prevents access to the knives, a control circu...	02/12/1991
4834303	Sharpening apparatus for forage harvester knives A forage harvester having an automatic grinding mechanism for the knives of the cutterhead, the grinding mechanism comprising a carriage carrying grinding means and being reciprocated back and forth across the cutterhead in the griding mode by endless dri...	05/30/1989
4746074	Grinding device for drum-type chopper In a drum type chopper, a drum, rotatable about a stationary axis, mounts cutters which co-act with a counter knife in effecting a chopping action. A cylindrical grinding wheel is positioned to sharpen the cutters on the drum. The grinding wheel is movabl...	05/24/1988
4718198	Apparatus for grinding cutting edges of knives in tobacco cutting machines The straight of undulate cutting edges of elongated knives on the rotary knife holder in a tobacco shredding machine are ground by a driven grinding wheel, whose axis makes a small acute angle with the axis of the holder, while the grinding wheel is rocke...	01/12/1988
4640059	Apparatus for grinding the knives in tobacco cutting machines A tobacco shredding machine wherein the cutting edges of orbiting shredding knives are sharpened by the undulate annular surface of a grinding wheel which is reciprocated forwardly and backwards in parallelism with the axis of the holder for the knives an...	02/03/1987
4635402	Knife abrasive apparatus for rotary drum shaped cutter A knife abrasive apparatus for a rotary drum shaped cutter can grind the knife edge without causing it to be serrated. It has a rotary drum shaped cutter including a rotary drum and knives spacedly disposed on the outer periphery of the drum at a predeter...	01/13/1987
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
4557074	Method and apparatus for grinding undulate cutting edges of knives in tobacco cutting machines The undulate cutting edges of knives on a rotary knife holder in a tobacco shredding machine are ground by a grinding wheel whose profile is complementary to that of the cutting edges and which is moved stepwise in parallelism with the axis of the holder ...	12/10/1985
4495734	Grinding arrangement for chopping cutter of drum-chopper machine An arrangement for grinding a chopping cutter of a drum-chopper machine has a grinding tool, a grinding carriage which carries the grinding tool and is reciprocable parallel to an axis of rotation of the chopper drum over a length of the latter, a drive f...	01/29/1985
4393627	Reversing screw/high-low speed level wind screw Sharpening mechanism for moving at a variable speed along the length of the sharp edge of a reciprocating knife used in cloth cutting machines is disclosed. The apparatus includes a driven grinding apparatus (26) such as is known in the art for contacting...	07/19/1983
4321773	Rotary chopping cylinder type forage harvester having means for sharpening its shear bar A forage harvester for harvesting crops and reducing them to forage by means of a rotary chopping cylinder which has a plurality of blades around its periphery which cooperate with a shear bar carried on the frame of the harvester. A sharpening device is ...	03/30/1982
4306385	Involute knife sharpener A sharpener for the knife blade of a slicing machine wherein the cutting edge of the knife blade is of involute shape. The mechanism comprises a pinion which is coaxially securable to the knife blade drive shaft, an elongate member is driving connection w...	12/22/1981
4195404	Cutting machine with an oscillating knife In a cutting machine of the type having a vertically reciprocating cutting blade, an internal grinder and a presser foot on a carrier bar, a lifting device responsive to operation of an actuating member for stopwise lifting the carrier bar to permit true ...	04/01/1980
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
4052013	Apparatus for shredding rubber tires and other scrap materials Multiple cutting discs are fixed in spaced-apart positions on each of two side-by-side counterrotating shafts so that peripheral portions of the discs on each shaft extend into the spaces between discs on the opposite shaft. Each disc has a smooth cylindr...	10/04/1977
4022093	Drum opening and closing mechanism An opening and closing mechanism for the casing of a machine, especially a tobacco cutting machine is provided, having a pair of meshing gears mounted on one machine part, which by way of a link-mechanism are adapted to rotate when the casing is opened. A...	05/10/1977
4019287	Spiral knife sharpener The cutting cylinder of a forage harvester has helically oriented knives which may be sharpened by shifting a spinning grinding stone back and forth across the housing for the cylinder in parallel relationship with the axis of rotation of the cylinder. Op...	04/26/1977
4010576	Apparatus for rebeveling spiral knives The helically oriented knives of a cutting reel, such as found in forage harvesters, may be sharpened by reciprocating a sharpening stone along the beveled cutting edge of each knife. The reel is held against rotation when the knife to be sharpened has be...	03/08/1977
4005554	Blade sharpening device for rotatable chopping cylinders A blade sharpening device for a rotatable chopping cylinder for a forage harvester or the like, which cylinder has a plurality of circumferentially spaced and generally parallel blades that are of a generally spiral shape. A carriage moves along parallel ...	02/01/1977
3991525	Apparatus for sharpening blades mounted on drums Apparatus for sharpening the operative cutting surface of a blade while the blade is mounted on a drum comprising a mounting unit for attachment to the drum and a linkage pivotably supported on the mounting unit and carrying a rotatable sharpening member ...	11/16/1976
3979076	Grinding wheel guide means for forage harvester A forage harvester having a rotatable cutter head coacting with a shear bar is provided with a grinding wheel which is power driven and adapted to be moved longitudinally along transversely extending guide means adjacent the circumferential outline of the...	09/07/1976
3958766	Cutterhead rotating mechanism for forage harvester A forage harvester having a rotatable cutter head co-acting with a shear bar is provided with means to rotate the cutter head stepwise for inspection of the knives of the cutter head without manually engaging the same. The means for advancing the cutter h...	05/25/1976

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Class 451/421 - Rotary reciprocating tool