A system for controlling operation of a power tool. The system includes a handpiece having a power tool, a radio frequency identification (RFID) tag, and a wireless transceiver. The system also includes a power pack having an electric motor driving the power tool. The power pack also includes a wireless transceiver, an RFID reader, and non-transitory computer-readable storage media having computer-executable instructions for pairing the handpiece to the power pack. When executed by at least one processor, the computer-executable instructions cause the at least one processor to: interrogate the RFID tag with the RFID reader; receive an RFID signal from the RFID tag including identifying information for the handpiece; store the unique identifying information for the handpiece at the power pack; and, based on receipt of the unique identifying information, complete wireless pairing of the handpiece to the power pack.

The pizza cutter cleaning, storage, and isolation device may allow a user to store and clean pizza cutters between uses, while also isolating each pizza cutter intended for specific consumers. Such a device may implement a cartridge system, one or more of which may be installed in a main body, into which a single pizza cutter may be placed. The cartridge may be designed to isolate and clean the pizza cutter installed therein, and the pizza cutters themselves may be color-coded, or the cartridges may be color-coded, so as to prevent cross-contamination of the cutters, the pizzas, or the debris picked up when cutting a pizza. The cartridges may further implement a sanitizing bath into which a pizza cutter head may be suspended, or may implement a catch tank for waste debris. The device may further comprise a blade sharpener for additional functionality.

A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an arm (116) arranged to support a cutting disc (130) and an electric motor (140) arranged to drive the cutting disc, the second part (120) comprising front (190) and rear (195) handles for operating the cut-off tool, and a battery compartment (150) for holding an electrical storage device (220, 1800) such as a battery arranged to power the electric motor (140), wherein one or more damping members (170, 1910) are arranged in-between the first part (110) and the second part (120), where at least one damping member (170, 1910) is formed in a resilient material associated with a damping coefficient.

A cutting device includes cutting device includes a housing including an aperture, and a blade cartridge removably coupled to the housing through the aperture. The blade cartridge is configured to hold a plurality of blades. The cutting device further includes a cartridge ejector configured to eject the blade cartridge from the housing.

A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

The invention relates to a rotary cutter (10) with an exchangeable blade (33), which enables the blade (33) to be replaced easily with little risk of injury and can be used in a variety of ways. The rotary cutter (10) comprises a handle (20) and a blade holder (30) which is detachably connected to the handle (20). A solid casing of the blade holder (30) takes at least half of the blade (33) within it (FIG. 1).

A battery compartment battery lock mechanism (700) comprising a locking member (710) rotatably supported on a shaft (720) and comprising a leading edge portion (750) arranged to enter a recess (760) formed in a battery (220) to lock the battery in position, The leading edge portion (750) has an arcuate form with a curvature corresponding to that of a circle segment with radius corresponding to the distance from the leading edge portion (750) to the center of the shaft (720) The recess (760) formed in the battery (220) comprises a surface (770) arranged to engage the leading edge portion (750), wherein the surface (770) has an arcuate form to match that of the leading edge portion (750). The invention further comprises an electrically powered hand-held work tool comprising such a battery lock mechanism.

A handheld work tool comprising a cutting tool (130), an electric motor (140) having a rotational axis and being arranged to drive the cutting tool (130), a battery compartment (150) for a battery (220) arranged to power the electric motor (140), a support arm (240) and a belt guard (115). The support arm (240) is arranged to support the circular cutting tool (130) on a first end (241) of the support arm, and to support the electric motor (140) at a second end of the support arm (242), opposite to the first end (241). The belt guard (115) and at least a part of the support arm (240) are configured to enclose an interior space (340), where the hand-held work tool (100, 200, 800, 1000) comprises a fan (145), configured to generate a flow of cooling air. A portion of the flow of cooling air is arranged to be guided via at least one opening (310) into the interior space (340), thereby increasing an air pressure in the interior space (340) above an ambient air pressure level.

A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900, 2300) comprising a fan (145) arranged to be driven by an electric motor (140) to generate a flow of cooling air (160) and a battery compartment (150) comprising an electrical storage device (220, 1800), such as a battery, arranged to power the electric motor (140), wherein a cooling air conduit is arranged to guide the flow of cooling air (160) towards an outlet aperture (1750) formed in a wall of the battery compartment (150), where the outlet aperture (1750) faces a corresponding inlet aperture (1870) formed in an enclosure of the electrical storage device (220, 1800) for receiving cooling air and thereby generating an air pressure above atmospheric pressure in the electrical storage device (220, 1800), wherein a first slot section (Ss1) is formed by a distance between the outlet aperture (1750) and the inlet aperture (1870) such that a first portion (2415) of the flow of cooling air (160) air leaks out to an exterior of the cut-off tool via the first slot section (Ss1).

The present invention relates to a cooling device for disc cutters, which can include: a curved, tubular guide (6), with a radius of curvature slightly greater than the cutter disc and concentric with the periphery of the disc (2); a curved cannula (4), made of semi-rigid material, mounted inside the curved guide capable of longitudinal movement between two end positions, connected to a tube (3) for supplying coolant to a nozzle (5); and means for attaching the cannula (4) in any position comprised between the two end positions of movement with respect to the curved guide. The nozzle (5) moves over a lower sector (21) of the periphery of the disc, and during the cutting of parts (P) of different thicknesses, said nozzle (5) is located at different heights and facing the disc (2) contact and penetration area in the part (P) to be cut.