JOINTING DEVICE Russian patent published in 2023 - IPC E04F21/165 

FIELD: repair and construction equipment.

SUBSTANCE: increased labour productivity is achieved by the fact that the device for patching cracks in floors, walls, ceilings of premises, facades and fences built of concrete, consisting of an angle grinder with a constant spindle speed, with a protective cover mounted on the body, with a disk cutter attached to its spindle, characterized in that the angle grinder is equipped with a spindle speed switch, a drill chuck is fixed on the angle grinder spindle, and the shank of the concrete end cutter is mounted in the drill chuck, equipped with depth limiters, made with the possibility of alternate placement on the shank, and the first limiter is made in the form of a sleeve, with an outer diameter greater than the diameter of the cutter, and is equipped with two mating internal holes, the first with a diameter equal to the diameter of the shank, the second - with a diameter equal to the diameter of the cutter, and in the first hole on the side there is a threaded hole for a locking screw, fixing the location of the limiter on the shank , and the second hole in the limiter is designed for sliding onto the cutter, partially covering it from above, the second depth limiter is made in the form of a washer with an outer diameter larger than the cutter diameter and a hole in the centre equal to the diameter of the shank, designed to be put on the shank with an emphasis on the butt cutters on one side and into the clamping jaws of the drill chuck on the other, while in place of the protective cover of the angle grinder a dust collector with three nozzles is installed: the upper nozzle of the dust collector is put on the protrusion on the angle grinder gearbox and secured with a clamp, the side coupler is designed to attach the hose from the vacuum cleaner using a cap nut, the lower branch pipe is designed to accommodate a working tool fastening it to the angle grinder spindle.

EFFECT: increase in labour productivity.

1 cl, 8 dwg