A cutter and a cutting method for concrete test blocks, where an upright column is fixed at left-rear end of a base, a support for an electric motor provided at rear end thereof is provided on an upper part of the column, a driving gear is provided at left side of the electric motor, a driven gear is connected with the driving gear via a belt, a control switch is provided at a front end of the support, a grip is provided at right side of the control switch, a transmission shaft is connected to right side of the driven gear, double sawblades are provided at right end of the transmission shaft, a shield is provided above the double sawblades, a water pipe is connected to an upper part of the shield, the clamp is provided at right-front end of the base and the handle is connected to the grip.

A walk-behind apparatus and method for cutting non-linear trenches in concrete includes a frame supported by fixed direction wheels at a front end on a fixed axis of rotation, and multi-directional wheels at a rear end to rotate on movable axes of rotation, to permit the frame to rotate about a vertical axis passing through the frame. A handle is engageable by a user walking behind the frame for pushing the apparatus forward and/or for steering. A cutting wheel has a diameter of 5-20 inches and a cutting portion having a width of 0.5-1.5 inches. The cutting rotates on an axis parallel to the fixed axis and which extends notionally through the fixed direction wheels. The cutting wheel is disposed within a protective shroud viewable by the user to permit the user to visually align and guide the cutting wheel along a non-linear path on the ground while steering.

A walk-behind apparatus and method for cutting non-linear trenches in concrete includes a frame supported by fixed direction wheels at a front end on a fixed axis of rotation, and multi-directional wheels at a rear end to rotate on movable axes of rotation, to permit the frame to rotate about a vertical axis passing through the frame. A handle is engageable by a user walking behind the frame for pushing the apparatus forward and/or for steering. A cutting wheel has a diameter of 5-20 inches and a cutting portion having a width of 0.5-1.5 inches. The cutting rotates on an axis parallel to the fixed axis and which extends notionally through the fixed direction wheels. The cutting wheel is disposed within a protective shroud viewable by the user to permit the user to visually align and guide the cutting wheel along a non-linear path on the ground while steering.

A handheld work apparatus has a tool and a brake assembly for the tool. The brake assembly has an actuating element which acts on a brake element of the brake assembly. The actuating element is movable between a fixed position wherein the tool is not braked, and a released position, wherein the brake element brakes the tool. To fix the actuating element in the fixed position, an electromagnet is provided. The electromagnet interacts with an anchor on the actuating element. The anchor is mounted via a pivot joint on an anchor pin to be pivotable about a pivot axis. A guide includes a guide part connected to the anchor and a guide part connected to the yoke, wherein, in the fixed position of the actuating element, the guide parts guide the anchor relative to the yoke in a transverse direction of an outrigger of the apparatus.

A fastening jig for securing a magnet block (M) when the magnet block is cutoff machined into pieces is provided, the jig comprising a lower clamp (31) on which the magnet block is rested, an upper clamp (32) disposed on the magnet block, and a press unit (33) for pressing the clamps to apply a pressing force to the magnet block. A portion of the lower clamp (31) which is disposed adjacent to the magnet block is provided with a generally horizontal channel (311) to define a resilient cantilever (312), whereby the magnet block is held between the clamps by the repulsion force of the cantilever (312).

A fastening jig for securing a magnet block (M) when the magnet block is cutoff machined into pieces is provided, the jig comprising a lower clamp (31) on which the magnet block is rested, an upper clamp (32) disposed on the magnet block, and a press unit (33) for pressing the clamps to apply a pressing force to the magnet block. A portion of the lower clamp (31) which is disposed adjacent to the magnet block is provided with a generally horizontal channel (311) to define a resilient cantilever (312), whereby the magnet block is held between the clamps by the repulsion force of the cantilever (312).

An apparatus for severing a workpiece having a cutting mechanism operable to cut the workpiece substantially along a selected course; drive mechanism operable to drive the cutting mechanism to cut the workpiece; a transport assembly operable to guide the workpiece in movement relative to a predetermined severing position and with respect to the cutting mechanism; and a frame mounting the cutting mechanism and transport assembly in predetermined relation to each other and relative to the severing position so that the drive mechanism is operable to drive the cutting mechanism to cut the workpiece in the severing position.

An apparatus for severing a workpiece having a cutting mechanism operable to cut the workpiece substantially along a selected course; drive mechanism operable to drive the cutting mechanism to cut the workpiece; a transport assembly operable to guide the workpiece in movement relative to a predetermined severing position and with respect to the cutting mechanism; and a frame mounting the cutting mechanism and transport assembly in predetermined relation to each other and relative to the severing position so that the drive mechanism is operable to drive the cutting mechanism to cut the workpiece in the severing position.

An angle grinder attachment which creates a portable, cordless, dustless, indoor ceramic tile cutting machine. There is no dust produced when using this attachment. The dust (and silica) are turned into a paste which is easily cleaned and disposed of. This attachment does not require electricity or running water in the field. This attachment is truly portable, it is self-contained, and it can be used indoors without creating dust or flooding an area with water

An angle grinder attachment which creates a portable, cordless, dustless, indoor ceramic tile cutting machine. There is no dust produced when using this attachment. The dust (and silica) are turned into a paste which is easily cleaned and disposed of. This attachment does not require electricity or running water in the field. This attachment is truly portable, it is self-contained, and it can be used indoors without creating dust or flooding an area with water