Abstract: A portable powered cutter comprises an operation tube (10), a transmission shaft (40) inserted through the operation tube (10), and a rotary blade (31) supported by a blade holder (30) connected to a forward end of the operation tube (10). The rotary blade (31) is rotated by rotational output of a power source transmitted by the transmission shaft (40). The blade holder (30) pivots, against a predetermined resistance, about a transverse axis (14) perpendicular to an axis of the operation tube (10) as viewed in plane. The transmission shaft (40) is flexible at least at a portion between the forward end of the operation tube (10) and the blade holder (30), and the flexible portion of the transmission shaft (40) is inserted through a bellows (100).

Abstract: A rotary impacting apparatus is provided which comprises a housing, a rotor rotatably accommodated in the housing, a driving source for rotating the rotor about a rotation axis, a main reciprocative implement reciprocatively held by the housing, and an impact member eccentrically held by the rotor. The impact member exerts an impacting force for pressing the main reciprocative implement when the main reciprocative implement is advanced relative to the rotation axis. The main reciprocative implement is provided with a diametrically smaller portion and a diametrically greater portion connected to the diametrically smaller portion.

Abstract: A rotary impacting apparatus is provided that includes a housing, a rotor rotatable about an axis, a main reciprocative implement and an impact member. The impact member is arranged to exert an impacting force on the main reciprocative implement when the main receprocative implement is advanced relative to the axis. The rotor is supported by the housing via needle bearings.

Abstract: A rotary impacting apparatus comprises a housing, a rotor rotated in the housing, an impact member eccentrically held by the rotor, and a main reciprocative implement held reciprocatively at a forward end portion of the housing. The rotor rotates to hit the impact member for driving the main reciprocative implement into the ground for instance. The apparatus further includes an auxiliary oscillating mechanism for transmitting an impacting force from the impact member to pull the main reciprocative implement when the housing is pulled relative to the main reciprocative implement by a predetermined distance.

Abstract: A rotary impacting apparatus comprises rotary member drivingly rotated about a rotational axis within a casing. An impact member is loosely held by the rotary member so as to be movable toward and away from the rotational axis within a limited range. A holder mounted to the casing slidably supports a reciprocative member to allow movement thereof toward and away from the rotational axis within a limited range. The reciprocative member has a contact surface which interferes with the impact member rotating about the rotational axis when the reciprocative member is positioned closest to the rotational axis.

Abstract: A portable power operated tool for cutting brush, mowing grass and the like which comprises a cutting implement mounted at one end of an elongated tubular housing and driven by a lightweight engine connected to the other end of the tubular housing, a fixing element for receiving and fixing a front part of an operator's right arm, the fixing element being located in position near the engine and along with one side of the elongated tubular housing, a first handle located in front of the fixing element, and a second handle located in front of the first handle and connected to the tubular housing.