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 portable apparatus and method for cutting linear trenches in a concrete ground surface includes two bars extending in parallel spaced relation along the concrete with an elongated track removably fastened and extending orthogonally thereto. A trolley supporting a motor-driven cutting wheel is movably engaged with the track. A depth adjuster alternately lowers and raises the cutting wheel to engage and disengage the concrete while the trolley follows contours of the concrete to cut a kerf of uniform depth. The track is selectively movable to spaced locations along the lengths of the two bars to cut a first plurality of parallel kerfs in a first direction. The apparatus is rotatable about a vertical axis to cut a second plurality of parallel kerfs oriented in a second direction at a predetermined angle, e.g., 90 degrees, to the first direction, to form a simulated tile pattern in the concrete.

A portable apparatus and method for cutting linear trenches in a concrete ground surface includes two bars extending in parallel spaced relation along the concrete with an elongated track removably fastened and extending orthogonally thereto. A trolley supporting a motor-driven cutting wheel is movably engaged with the track. A depth adjuster alternately lowers and raises the cutting wheel to engage and disengage the concrete while the trolley follows contours of the concrete to cut a kerf of uniform depth. The track is selectively movable to spaced locations along the lengths of the two bars to cut a first plurality of parallel kerfs in a first direction. The apparatus is rotatable about a vertical axis to cut a second plurality of parallel kerfs oriented in a second direction at a predetermined angle, e.g., 90 degrees, to the first direction, to form a simulated tile pattern in the concrete.

The invention relates to a ceramic cutter having liquid-cooling by immersion of the cutting disc, comprising: a support frame; an electric motor for actuating a cutting disc; a tray containing water for cooling the cutting disc by immersion; an auxiliary water tank, which is removable, disposed above the cooling tray and provided with a gravity-driven water outlet for discharging water into the cooling tray, said outlet being accommodated in the tray and being disposed at a height corresponding to a predetermined level of the water for cooling the cutting disc by immersion.

The invention relates to a ceramic cutter having liquid-cooling by immersion of the cutting disc, comprising: a support frame; an electric motor for actuating a cutting disc; a tray containing water for cooling the cutting disc by immersion; an auxiliary water tank, which is removable, disposed above the cooling tray and provided with a gravity-driven water outlet for discharging water into the cooling tray, said outlet being accommodated in the tray and being disposed at a height corresponding to a predetermined level of the water for cooling the cutting disc by immersion.

A plurality of interposers are made from a material substrate. The material substrate includes a glass substrate partitioned by a plurality of crossing division lines to define a plurality of separate regions. A multilayer member is provided on a first surface or a second surface opposite to the first surface of the glass substrate and has an insulating layer and a wiring layer. An exposed surface of the multilayer member is cut along each division line by using a first cutting blade to form a cut groove on the exposed surface of the multilayer member, the cut groove having a depth not reaching the glass substrate. The glass substrate is cut along each cut groove by using a second cutting blade having a thickness smaller than the width of each cut groove to thereby divide the glass substrate and manufacture the plural interposers.

A cutting machine according to the present invention comprises: a cutting frame; a cutting shaft which, if the direction in which the cutting machine moves is said to be the front and the direction opposite thereto is said to be the rear, is arranged on the front of the cutting frame, and a cutting blade inserted to the cutting shaft; a middle frame which is positioned below the cutting frame and supports same; a first track part provided on one side of the cutting machine in order to move same, and a second track part provided on the other side of the cutting machine; and a track frame positioned below the middle frame and the sides of which are connected to the respective track parts, wherein the front end of the middle frame is positioned to be lower than the rear end thereof so that the middle frame is slanted in a first preset angle, and the cutting frame is positioned above the middle frame, fixes the rear end, and can be provided so that the cutting shaft and the cutting blade can move vertically.

A cutting machine according to the present invention comprises: a cutting frame; a cutting shaft which, if the direction in which the cutting machine moves is said to be the front and the direction opposite thereto is said to be the rear, is arranged on the front of the cutting frame, and a cutting blade inserted to the cutting shaft; a middle frame which is positioned below the cutting frame and supports same; a first track part provided on one side of the cutting machine in order to move same, and a second track part provided on the other side of the cutting machine; and a track frame positioned below the middle frame and the sides of which are connected to the respective track parts, wherein the front end of the middle frame is positioned to be lower than the rear end thereof so that the middle frame is slanted in a first preset angle, and the cutting frame is positioned above the middle frame, fixes the rear end, and can be provided so that the cutting shaft and the cutting blade can move vertically.

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.