A device for supplying and recovering a minimal quantity lubricant in a magnetic field-assisted abrasive grinding, including a grinding wheel guard assembly, including a grinding wheel guard, grinding wheel, and wind deflector; a magnetic worktable mounted on the guard, and a magnetic clamp on the worktable; a controllable magnetic field assembly, including a permanent magnet and a first guide rail mechanism mounted on the deflector, the magnet being connected to the mechanism and to a recovering and filtering device; a controllable nozzle assembly, connected to the deflector on an opposite side of the magnetic field assembly, including a nozzle connected to a linear motion mechanism; and a controlling and monitoring assembly, including a vision camera on the worktable, connected to a system control box. The magnetic nanofluid can exert the optimal lubricating properties and cooling performance under the magnetic field-assisted abrasive grinding, and the magnetic nanoparticles can be further recycled.

A device for supplying and recovering a minimal quantity lubricant in a magnetic field-assisted abrasive grinding, including a grinding wheel guard assembly, including a grinding wheel guard, grinding wheel, and wind deflector; a magnetic worktable mounted on the guard, and a magnetic clamp on the worktable; a controllable magnetic field assembly, including a permanent magnet and a first guide rail mechanism mounted on the deflector, the magnet being connected to the mechanism and to a recovering and filtering device; a controllable nozzle assembly, connected to the deflector on an opposite side of the magnetic field assembly, including a nozzle connected to a linear motion mechanism; and a controlling and monitoring assembly, including a vision camera on the worktable, connected to a system control box. The magnetic nanofluid can exert the optimal lubricating properties and cooling performance under the magnetic field-assisted abrasive grinding, and the magnetic nanoparticles can be further recycled.

A drive device for a protective hood of a machine includes a counterweight, a pulling means connecting the protective hood to the counterweight, a motor, and a freewheel. The freewheel connects the motor to the pulling means and is arranged to block when a weight force of the protective hood is greater than a weight force of the counterweight. The freewheel may be a linear freewheel or the freewheel may operate between two rotatable elements. The freewheel may be a frictionally locking freewheel or a positive locking freewheel.

A drive device for a protective hood of a machine includes a counterweight, a pulling means connecting the protective hood to the counterweight, a motor, and a freewheel. The freewheel connects the motor to the pulling means and is arranged to block when a weight force of the protective hood is greater than a weight force of the counterweight. The freewheel may be a linear freewheel or the freewheel may operate between two rotatable elements. The freewheel may be a frictionally locking freewheel or a positive locking freewheel.

A guard lock for a powered apparatus having a neck extending from a gear case is provided. The guard lock includes a guard member having a body portion for at least partially surrounding a working member of the power tool and a collar connected to and extending from the body portion, where the collar includes multiple windows that are spaced from one another. The guard lock also includes a stop lever coupled to the gear case via a fastener about which the stop lever may pivot, the stop lever including an engagement portion and a distant arm portion, and a biasing member for biasing the engagement portion of the stop lever toward a window of the collar. When the engagement portion is positioned within a window, rotation of the collar is permitted in a first direction where the window engages a first surface of the engagement portion but is prevented in a second direction where the window engages a second surface of the engagement portion. A depression of the distal arm portion toward the collar pivots the engagement portion away from the window.

A guard lock for a powered apparatus having a neck extending from a gear case is provided. The guard lock includes a guard member having a body portion for at least partially surrounding a working member of the power tool and a collar connected to and extending from the body portion, where the collar includes multiple windows that are spaced from one another. The guard lock also includes a stop lever coupled to the gear case via a fastener about which the stop lever may pivot, the stop lever including an engagement portion and a distant arm portion, and a biasing member for biasing the engagement portion of the stop lever toward a window of the collar. When the engagement portion is positioned within a window, rotation of the collar is permitted in a first direction where the window engages a first surface of the engagement portion but is prevented in a second direction where the window engages a second surface of the engagement portion. A depression of the distal arm portion toward the collar pivots the engagement portion away from the window.

A portable ski and/or snowboard edge sharpener and method. The edge sharpener includes an abrasive grinding wheel, a belt driven drive train that connects the electric motor and the grinding wheel drive mechanism and decreases the grinding wheel's speed of rotation relative to the rotational speed of the motor, a grinding wheel mount allowing the operator to select and use grinding wheels of different grits and materials and grinding wheel control mechanisms allowing the operator to control the cut depth and the grinding wheel angles relative to the longitudinal and transverse planes of the ski edge surface to be sharpened. This configuration allows the operator to repeatedly sharpen a ski edge at a specific and chosen angle with a specific and chosen surface finish. Other features include, position lockdown devices being part of each of the control mechanisms and a vacuum system to capture residue from the grinding operation.

A portable ski and/or snowboard edge sharpener and method. The edge sharpener includes an abrasive grinding wheel, a belt driven drive train that connects the electric motor and the grinding wheel drive mechanism and decreases the grinding wheel's speed of rotation relative to the rotational speed of the motor, a grinding wheel mount allowing the operator to select and use grinding wheels of different grits and materials and grinding wheel control mechanisms allowing the operator to control the cut depth and the grinding wheel angles relative to the longitudinal and transverse planes of the ski edge surface to be sharpened. This configuration allows the operator to repeatedly sharpen a ski edge at a specific and chosen angle with a specific and chosen surface finish. Other features include, position lockdown devices being part of each of the control mechanisms and a vacuum system to capture residue from the grinding operation.

A grinding wheel assembly has a tool holder, a mounting shaft connected to the tool holder, and a grinding wheel mounted on the mounting shaft. The tool holder has a first coolant passage defined through the tool holder. The mounting shaft has a second coolant passage communicating with the first coolant passage. The grinding wheel has multiple third coolant passages defined through the grinding wheel and communicating with the second coolant passage. The first coolant passage, the second coolant passage, and the multiple third coolant passages are utilized for a coolant to flow through. Thereby, the grinding wheel and a workpiece can be cooled down without setting up any pipeline and nozzle for the coolant in a grinding machine.

A cutting apparatus includes a cutting unit including a spindle as a rotational shaft and a mount flange for mounting a cutting blade thereon, the mount flange being fixed to a distal end of the spindle, a support unit for supporting a cutting blade housed in a blade case, the support unit including a blade case support for supporting the blade case for housing the cutting blade therein, a changing mechanism for dismounting a cutting blade that has been mounted on the mount flange from the mount flange and mounting the cutting blade that has been supported on the support unit on the mount flange, and a moving mechanism for moving the changing mechanism between a changing position, a blade transfer position, and a retracted position.