Abstract: 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.

Abstract: 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 t

Abstract: 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.

Abstract: A hand-held work tool (100) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an interface for holding a circular cutting tool (130) and an electric motor (140) arranged to drive the circular cutting tool, wherein the electric motor (140) is arranged to drive a fan (145) configured to generate a flow of cooling air for cooling the electric motor (140), the second part (120) comprising a battery compartment (150) for holding an electrical storage device arranged to power the electric motor (140), wherein a cooling air conduit is arranged to guide a portion of the flow of cooling air (160) from the first part (110) and into the second part (120) for cooling the electrical storage device.

Abstract: A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900, 2500) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an interface (2510) for holding a cutting tool (130) and an electric motor (140) arranged to drive the cutting tool, wherein the first part is associated with a first mass (M1), the second part (120) comprising a battery compartment (150) for holding an electrical storage device (220) arranged to power the electric motor (140) as well as front (190) and rear (195) handles for operating the cut-off tool, wherein the second part is associated with a second mass (M2), wherein the electrical storage device (220) is associated with a third mass (M3), and wherein the cutting tool is associated with a fourth mass (M4), wherein a ratio of the second mass (M2) to the sum of the first and second masses (M1+M2) is at least 0.3, and preferably more than 0.

Abstract: A control signal is wirelessly transmitted from a first radio communication unit of a portable communication device to a second radio communication unit. The portable communication device is provided for radio communication over a first radio frequency band using a first modulation technique. The control signal is transmitted by generating a control signal, switching off the first modulation of a carrier signal, shifting the frequency of the carrier signal from a first radio frequency band to a second radio frequency band for the first radio communication unit, switching on the second modulation of the carrier signal having a frequency within the second radio frequency band, wherein the carrier signal is modulated with the control signal, and transmitting the control signal modulated carrier signal wirelessly over the second radio frequency band to the second radio communication unit.

Abstract: A control signal is wirelessly transmitted from a first radio communication unit of a portable communication device to a second radio communication unit. The portable communication device is provided for radio communication over a first radio frequency band using a first modulation technique. The control signal is transmitted by generating a control signal, switching off the first modulation of a carrier signal, shifting the frequency of the carrier signal from a first radio frequency band to a second radio frequency band for the first radio communication unit, switching on the second modulation of the carrier signal having a frequency within the second radio frequency band, wherein the carrier signal is modulated with the control signal, and transmitting the control signal modulated carrier signal wirelessly over the second radio frequency band to the second radio communication unit.

Abstract: To effectively suppress harmonics in a dual band mobile phone with a power amplifier (10) outputting transmitting signals for different frequency bands (GSM; PCS, DCS) via a single output as described a power amplifier output circuit in which harmonics are filtered through impedance transformation of a turn-off impedance of a transmitter/receiver change over unit (36, 38). Hereby the desired filtering of harmonics may be achieved without almost no additional expenditure.