Abstract: Disclosed is a straw crushing device capable of driving a sharpening structure, relating to the field of straw crushing. The straw crushing device includes a main housing, the main housing is internally provided with a crushing chamber and a suction chamber, a feeding nozzle is installed outside the main housing, and the feeding nozzle communicates with a feeding end of the crushing chamber. A spline transmission shaft is installed inside the main housing, and penetrates through the crushing chamber and the suction chamber. A driving motor is installed outside the main housing, and the driving motor is connected to the spline transmission shaft. A Y-shaped tool rest is installed on the spline transmission shaft, and the Y-shaped tool rest is located in the crushing chamber.

Abstract: A circular jig apparatus to allow cutting or marking of large circular holes in sheets of material using a tool with a cutting blade or marking device is disclosed. This apparatus includes a system to hold the hold the tool in place, adjust the size or radius of the circular hole, and guide the cutting blade or marking device around in a circle on the sheet of material. In particular the cutting tool may be a vibrating blade. A system is also disclosed to match the curvature of the cutting blade to the arc or radius of the circle being cut. A system is also disclosed to provide a depth stop for the cutting blade. A system to hold a wide variety of marking or dispensing devices for use with the circular jig is also disclosed.

Abstract: A sharpening device for sharpening and grinding mower blades. The sharpening device includes a roller table and a plurality of mower blade mounting platforms that slide back and forth atop a base. The mower blade mounting platforms include an electromagnet that secures a mower blade to a support surface and guides for directing the position of the secured mower blade. The sharpening device further includes a plurality of sharpening members, such as grindstones, that engage with the mower blades secured to the mower blade mounting platforms. Each mower blade mounting platform includes adjustment mechanisms that allow a user to alter the lateral position of the blade and the sharpening angle of the blade. A first and second motor causes the mower blade mounting platforms to reciprocate and the sharpening members to rotate.

Abstract: A plant material trimming device includes two end walls supporting a rotatable perforated tumbler, a rotatable reel with helical blades, and a blade mechanism pivotably connected to the end walls of the device. The blade mechanism includes: (i) a blade bar configured to cut plant material in cooperation with the helical blades when the device is in operation; (ii) a first arm operatively associated with the blade bar; and (iii) a second arm pivotably connected to the first arm such that the second arm can pivot downward when the blade mechanism is unlocked. A tightening block may be threadedly connected to the second arm and connectable to one of the two end walls. The tightening block may be configured for adjusting the pitch of the blade bar relative to the helical blades when the blade mechanism is locked to the end walls.

Abstract: A honing apparatus includes a sharpening stone that has a sharpening surface configured to sharpen the edge of the blade upon engaging contact with the edge of the blade. A frame is operatively coupled to the sharpening stone, and a weight element is supported by the frame and positioned so as to urge the sharpening stone toward the edge of the blade. The frame may be pivotally coupled to a fixed element at a pivoting location, and the weight element may be positioned so as to create a moment about the pivoting location, with the moment urging the sharpening stone toward the edge of the blade.

Abstract: A device constructed of a material strong enough to withstand the torque of a typical air wrench or cheater bar used by a lawn mower repair shop or a homeowner. One end of the device must have an opening and be of the size as to allow a lawn mower blade to be inserted inside of it. The portion containing the tip of the blade may include a leveler and/or retainer to raise the device to approximately the horizontal plane of the mower blade and the lower edge of the mower deck. The device includes a restriction leg to provide a prop against any protuberance on the side of a single-blade mower deck or on the side or within the deck on a multi-blade mower deck. To provide economics for manufacturing, one size should fit most blades and the device should require a limited quantity of materials and fabrication.

Abstract: A sheet material cutting apparatus includes a cutting head and a knife frame rotatably coupled to the cutting head. A blade defining a cutting edge is coupled for reciprocation to the knife frame, as is a primary sharpener for sharpening substantially the entire cutting edge of the blade after it becomes dull from operation. A presser foot having a secondary sharpener mounted thereon, is also coupled to the knife frame for movement between a raised non-working and a lowered working position. The secondary sharpener includes a sharpening member engageable with the cutting edge of the blade via the action of an actuator, for sharpening a portion of the blade's cutting edge between primary sharpening operations.

Abstract: A reciprocating knife cutter for performing a cutting operation on sheet material is provided wherein the knife is not limited to reciprocation along a vertical axis. The cutter includes a guide which engages the knife, whereby the knife and guide are constrained to slide relative to one another along the longitudinal axis of the knife. The knife is reciprocated by an eccentric drive mechanism in a plane perpendicular to the drive axis of the mechanism, and the guide is pivotally mounted on the cutter so that the knife and guide remain in engagement as the knife is reciprocated. A sheet material cutting apparatus including such a reciprocating cutter is also provided. The invention also provides a knife sharpener for a cutting apparatus.

Abstract: A hand-held sharpening device for sharpening a blade including an elongated sharpening polygon having a plurality of substantially planar sharpening surfaces for receiving the edge of a blade, opposite ends on the elongated sharpening polygon, a plastic cap covering each of the ends, a graspable extension extending outwardly from one of the caps, and a tie in the form of a chain secured to the graspable extension.

Abstract: A saw chain sharpener for a chain saw and a chain saw having a sharpener in which the bottom surfaces of the cutting teeth of a conventional bottom sharpened saw chain are conveniently sharpened automatically by running the chain under power through the sharpener. The saw chain can be sharpened using the sharpener in a matter of typically twenty to thirty seconds without removing the chain from the chain bar. The sharpener is preferably adapted to be removably mounted to a bracket which is itself preferably removably disposed on the chain saw. The sharpener comprises a sharpening tooth disposed in a housing which is mounted on the chain bar. A top surface of the sharpening tooth frictionally engages bottom surfaces of the cutting teeth of the chain as the chain is run under power. A device for dispensing a sharpening compound to the sharpening tooth during sharpening may be disposed on the sharpener housing.

Abstract: A hand-held sharpening device for sharpening a blade including an elongated sharpening polygon having a plurality of substantially planar sharpening surfaces for receiving the edge of a blade, opposite ends on the elongated sharpening polygon, a plastic cap covering each of the ends, a graspable extension extending outwardly from one of the caps, and a tie in the form of a chain secured to the graspable extension.

Abstract: A rotary cutter head knife jointer is disclosed, in which a rigid base is adapted for mounting in a fixed position adjacent a rotary cutter head. The jointer includes a first carriage and a first guide that mounts the first carriage to the rigid base for translational movement along a first prescribed path. A second carriage is mounted to the first carriage and includes a jointing stone holder and a bolster plate. A second guide member mounts the bolster plate to the first carriage for translational movement along a second prescribed path. The second guide member includes a pair of parallel elongated guide bars that are mounted between the first carriage or bolster plate, to define the second prescribed path. A pair of guide bar engaging members are located on one or both of the first carriage and bolster plate.

Abstract: A card clothing is mounted on a support and rotatable therewith about an axis. A grinding apparatus for the card clothing has an abrasive grinding element, a base juxtaposed with the card clothing, and an elastic biasing element for pressing the grinding element radially of the axis against the card clothing so that when the support and card clothing are rotating the element grinds the card clothing. The grinding element is displaceable radially outward away from the card clothing against a force of the biasing element from a grinding position engaging the card clothing to a rest position out of contact with the card clothing. The apparatus has a mechanism for withdrawing the grinding element against the force of the biasing element into the rest position and for retaining it in the rest position. An abutment is provided furthermore for defining a position of closest approach of the grinding element to the axis and hence, how much it will grind down the card clothing.

Abstract: The invention is a sharpener for a knife of a food slicer. The sharpener includes a base assembly and a sharpener assembly. The base assembly includes a lever mounted thereto on a pivot; the lever carrying a cam member which extends therefrom. The sharpener assembly includes a housing and a longitudinal cavity, a sharpening wheel mounted for rotation on an axle which reciprocates lengthwise in the cavity, a compression spring positioned in the cavity at the base of the axle, and an actuator which reciprocates in the cavity portion on the side of the spring opposite the axle. Upon moving the lever about its pivot, the cam contacts the actuator and moves the actuator in the direction of the axle and compresses the spring. The spring moves the plunger lengthwise within the cavity and urges the sharpening wheel against the knife.