Abstract: There is provided an engine working machine operated by an engine including a fuel tank, a carburetor and a crankcase, wherein the engine working machine is provided with a fuel supply path configured to supply an additional fuel in an interior of a crank chamber at a time of starting and an starting aid device including a solenoid valve configured to open/close the fuel supply path. The solenoid valve provided inside the starting aid device is controlled by a control unit equipped by a control circuit board and is driven by power of the battery so as to open/close a fuel inlet hole. At the time of starting the engine, the control unit controls opening/closing the solenoid valve at an appropriate timing, so that the fuel is directly inlet to the interior of the crank chamber.

Abstract: An air compressor including: a motor; a compression mechanism that is configured to be driven by the motor; a tank unit that includes an air tank configured to store therein compressed air generated by the compression mechanism and to which the motor is fixed; an elastic member via which the compression mechanism is coupled to the tank unit; and a rotation transfer member that is configured to transfer a rotational force of the motor to the compression mechanism even when a shaft center of a rotary shaft of the motor and a shaft center of a rotary shaft of the compression mechanism deviate from each other.

Abstract: A cutter including a base, a holder, a cutter blade portion, and a laser generator. The holder is supported on the base portion in an upright posture. The cutter blade portion supports a moving blade. The cutter blade portion is supported on the holder movable between an upper position and a lower position. The cutter blade portion is moved into the lower position to cut a workpiece supported on the base using the moving blade. The laser generator is attached to the holder or the cutter blade portion in an orientation to direct at least a portion of the laser light onto a position on the workpiece that is directly beneath the cutter blade portion when the cutter blade portion is in the upper position.

Abstract: A centrifuge capable of suppressing a long-time depressurization as compared with the case of starting depressurizing after cooling has been completed as well as shortening a cooling time of a rotor and a sample in the rotor is achieved as compared with the case of starting cooling is at the same time with depressurization. Operation of a Peltier element is started at the same time with operation start of the centrifuge. A bowl is cooled by heat absorption of the Peltier element, and the rotor is cooled by the bowl with using ambient air as a thermal medium. At this time, a vacuum pump depressurizing a rotor chamber is in an OFF state (ambient conditions). After a predetermined time is elapsed, the vacuum pump is turned on to start depressurization of the inside of the rotor chamber.

Abstract: A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.

Abstract: Front feet are provided at a lower part of a cutting-machine main body via a foot holder. Furthermore, a slider positioned on a front side relative to the front feet is provided at the lower part. When a workpiece to be cut is to be cut by a blade, the cutting-machine main body is tilted so as to let the blade go down. When the cutting-machine main body is tilted, a state where the front feet are in contact with the workpiece is switched to a state where the slider is in contact with the workpiece. Then, by moving the cutting-machine main body forward while sliding the slider on the workpiece, the workpiece is cut by the blade. In the cutting operation, the front feet can get away from the workpiece. Therefore, damage of the front feet can be prevented, and the running cost can be suppressed.

Abstract: A centrifuge includes a vacuum pump machine configured of an auxiliary vacuum pump and an oil diffusion pump for exhausting gas inside a rotary chamber to outside, in which a rotor rotates at high speed. In the centrifuge, a thermistor for detecting a temperature of oil and an oil surface inside a boiler of the oil diffusion pump is provided inside the boiler, and power of a heater is adjusted with the temperature detected by the thermistor, so that a degree of vacuum inside the rotary chamber is stably reduced from atmospheric pressure to a high vacuum state. Besides, when the heater does not heat, a current is carried through the thermistor for self-heating, and it is determined from variation in a resistance value whether the oil exists or not at a position at which the thermistor 8 is placed.

Abstract: A portable engine configured to operate a working machine includes: an engine body mainly configured by a crankcase and a cylinder; a carburetor connected to an inlet port of the cylinder; an air cleaner connected to the carburetor to filter suction air; a cleaner box configured to accommodate the air cleaner; and a fuel tank configured to store fuel which is supplied to the cylinder, wherein at least a part of the fuel tank is located between the cleaner box and the engine body.

Abstract: A chainsaw includes: an engine unit; a fuel supplying device configured to supply fuel to the engine unit; and an engine chamber defining portion defining an engine chamber therein. The engine unit includes: a cylinder unit housing a piston therein; a crankshaft configured to be driven by the piston; and a crank case configured to support the cylinder unit and house the crankshaft therein. The cylinder unit is accommodated in the engine chamber. The engine chamber defining portion has a partitioning portion interposed between the cylinder unit and the fuel supplying device and is formed with a first engine chamber venthole and a second engine chamber venthole adjacent to the cylinder unit for achieving ventilation between the engine chamber and atmosphere.

Abstract: A battery device is constituted by connecting such cell assemblies in parallel as each includes: a first cell group having a plurality of cells connected in series; a housing container for housing the first cell group; current detector housed in the container for detecting a current to flow through the first cell group; a switching element connected with the first cell group for turning ON/OFF the current to flow through the first cell group; and a controller for controlling the ON/OFF of the switching element in response to the output signal of the current detector.

Abstract: A miter saw including: a base section; a saw blade; a cutting section; a support section; and a guiding mechanism. The support section includes a pivot support portion and a slide support portion. The pivot support portion supports the cutting section such that the cutting section is pivotally moved toward and away from the base section. The slide support portion slidably supports the pivot support portion to move the cutting section in a sliding direction that is in parallel with an upper surface of the base section and orthogonal to an axial direction of a rotational axis of the saw blade. The guiding mechanism is configured to guide a movement of the cutting section in the sliding direction in accordance with a pivotal movement of the cutting section toward the base section. The guiding mechanism is provided in association with the cutting section and the slide support portion.

Abstract: A cutting machine is provided with: a vice for fixing a workpiece to be cut; a base on which the vice is provided; an arm attached to a front side of the base via a hinge and supported so as to be slidable in a direction away from and toward the base; a cutting grind stone driven so as to rotate by a driving unit provided at the arm; a wheel cover for covering an upper-side portion of the cutting grind stone; and an auxiliary cover extended from a front-side opening portion of the wheel cover to a rear side and attached to the wheel cover so as to be slidable thereon.

Abstract: A power tool including: a motor configured to be rotated by a lithium-ion secondary battery; an end tool configured to be driven by the rotation of the motor; and a switch configured to cause power to be supplied from the lithium-ion secondary battery to the motor when being manipulated by an operator, wherein the lithium-ion secondary battery includes a cell having a 14500 size and is configured to rotate the motor such that an output of the motor is sufficient for driving the end tool.