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.

A mower reel grinding apparatus including at least one bracket moveable in a horizontal plane along a positioning axis to any one of a number of predetermined positions and configured to releasably secure to a pivot mechanism of a plurality of types of mower units, the pivot mechanism having a pivot axis, each type of mower unit including a cutting reel positioned at a known location relative to the pivot axis, and each of the predetermined positions corresponding to at least one type of mower unit of the plurality of types of mower units, wherein the at least one bracket is moved to the predetermined position corresponding to the type of mower unit secured thereto such that the cutting reel is positioned at a desired grinding position along the positioning axis when the pivot axis is secured to the bracket.

An arm unit for a lawn mower blade sharpening and task robot that raises and lowers a plate and/or docking unit, and/or sharpening unit, and/or task unit to complete instructions of sharpening and/or docking and/or tasks on a lawn mower blade, and/or lawn mower blade spindle, and/or lawn mower deck assembly.

A blade sharpener for use with a powered rotary tool having a rotatable sharpening element includes a main body having a bore for receiving the powered rotary tool, where the bore extends through the main body along an axis and the main body has a first channel for receiving a blade to be sharpened. The first channel is perpendicular to the rotary axis and opens into the bore to permit a blade to engage the sharpening element. The blade sharpener also includes a guide having a guide channel for receiving a blade to be sharpened where the guide is pivotally attached to the main body to accommodate any curvature of a blade to be sharpened as the blade sharpener follows along the blade.

A blade sharpener for manual use includes a base, and at least one sharpening device pivotally attached to the base. Each sharpening device has a channel for receiving a blade to be sharpened. A second pivotally attached device may be sharpening device or a guide. The two devices are pivotable independently of each other thereby accommodating any curvature of a blade to be sharpened as the blade sharpener is moved along the blade. A blade sharpener for use with a powered rotary tool includes a main body having a bore for receiving the powered rotary tool, and a channel for receiving a blade to be sharpened. A guide having a channel is pivotably attached to the main body to accommodate any curvature of a blade.

A lawn mower blade sharpening and task robot that autonomously drives under a lawn mower including a body, at least one motor, and a microprocessor. The robot also includes at least one a camera for object recognition and visualization of at least one of the lawn mower, a lawn mower deck, a lawn mower blade, and a lawn mower blade cutting edge, and at least one a sensor to sense the lawn mower, the lawn mower deck, the lawn mower blade, and lawn mower cutting edge. The robot may also include at least one of a task tool, a task arm, a task tip, and a task element in order to complete tasks such as sharping lawn mower blades and cleaning lawn mower blades.

A blade sharpener for manual use includes a base, and at least one sharpening device pivotally attached to the base. Each sharpening device has a channel for receiving a blade to be sharpened. A second pivotally attached device may be sharpening device or a guide. The two devices are pivotable independently of each other thereby accommodating any curvature of a blade to be sharpened as the blade sharpener is moved along the blade. A blade sharpener for use with a powered rotary tool includes a main body having a bore for receiving the powered rotary tool, and a channel for receiving a blade to be sharpened. A guide having a channel is pivotably attached to the main body to accommodate any curvature of a blade.

A jig assembly is disclosed herein for holding a mower blade and a grinding tool during a sharpening operation on the mower blade. The jig assembly includes a mast, a fixture portion, and a jig portion. The fixture portion and jog portion can be mounted to the mast. The jig portion can include an arm and a tool-seat. The arm can include at least a first link and a second link movable relative to one another. The first link can be pivotally connected to the mast with a first pin defining an arm pivot axis. The first link and the second link can be interconnected whereby the second link is prevented from rotating in any plane that contains the arm pivot axis. The tool-seat can be disposed on the second link.

A mower reel grinding apparatus for a plurality of types of mower units, the apparatus including a grinding wheel having a grinding wheel axis, and an enclosure including a table having a plurality of integral mounting channels. Each mounting channel is at a predetermined fixed position relative to the grinding wheel axis and each corresponds to at least one type of mower unit of the plurality of mower unit types, each mounting channel to receive a pivot element of one of the corresponding mower unit types such that when the pivot element is seated in the mounting channel a cutting reel of the mower unit is positioned at a desired position relative to the grinding wheel axis.

A device for sharpening lawnmower and sod cutting blades is provided. The blade sharpener provides a rotatable blade bed that can be used to safely adjust the grinding attack angle without exposing the operator to the moving grinding wheel. The blade bed of the present invention can be quickly adjusted over a range of different sharpening angles and is adapted for honing both right and left-sided blades.