Abstract: An extendible working machine has a rotation/drive section, a working section, and a rod section which connects the rotation/drive section and the working section, transmits rotational force to the working section, and can be extended and retracted. The rod section has a tube body which can be extended and retracted, and also has a shaft body which extends in the axial direction within the tube body and which can be extended and retracted together with the tube body. The shaft body has a pipe shaft which is supported within the inner tube in a rotatable manner. Helical grooves are formed in the surface of the drive shaft. The drive shaft is connected to the pipe shaft so the pipe shaft can move in the axial direction along the outer surface of the drive shaft and so the rotation of the drive shaft is transmitted to the pipe shaft.

Abstract: An extendible working machine has a rotation/drive section, a working section, and a rod section which connects the rotation/drive section and the working section, transmits rotational force to the working section, and can be extended and retracted. The rod section has a tube body which can be extended and retracted, and also has a shaft body which extends in the axial direction within the tube body and which can be extended and retracted together with the tube body. The shaft body has a pipe shaft which is supported within the inner tube in a rotatable manner. Helical grooves are formed in the surface of the drive shaft. The drive shaft is connected to the pipe shaft so the pipe shaft can move in the axial direction along the outer surface of the drive shaft and so the rotation of the drive shaft is transmitted to the pipe shaft.

Abstract: Problem to be solved: to provide an extendible working machine which is lightweight and which has a rod section capable of being extended longer. Solution: an extendible working machine is provided with a rotation/drive section, a working section, and a rod section which connects the rotation/drive section and the working section, transmits rotational force to the working section, and can be extended and retracted. The rod section is provided with a tube body which can be extended and retracted, and also with a shaft body which extends in the axial direction within the tube body and which can be extended and retracted together with the tube body. The tube body is provided, with an outer tube and with an inner tube which can move within the outer tube. The shaft body is provided with a drive shaft which is supported within the outer tube by bearings in a rotatable manner, and also with a pipe shaft which is supported within the inner tube in a rotatable manner.

Abstract: An engine breaker includes a vertically extending cylindrical main body (1), a work member (2) supported by a lower portion of the main body for up and down movement, an engine (5) mounted to an upper portion of the main body and having an output shaft arranged to extend horizontally, and a striker (30) incorporated in the main body (1) for successively striking an upper end of the work member (2) through rotation of a horizontally extending rotary shaft (6) to which rotation output of the engine (1) is transmitted. The engine (5) includes a housing (5a) supported by the main body (1) via a resilient member (8), and a flexible coupling (9, 9A, 9B) for absorbing vibration in a direction crossing the rotary shaft (6) is interposed between the output shaft (52) and the rotary shaft (6).

Abstract: An engine breaker includes a vertically extending cylindrical main body (1), a work member (2) supported by a lower portion of the main body for up and down movement, an engine (5) mounted to an upper portion of the main body and having an output shaft arranged to extend horizontally, and a striker (30) incorporated in the main body (1) for successively striking an upper end of the work member (2) through rotation of a horizontally extending rotary shaft (6) to which rotation output of the engine (1) is transmitted. The engine (5) includes a housing (5a) supported by the main body (1) via a resilient member (8), and a flexible coupling (9, 9A, 9B) for absorbing vibration in a direction crossing the rotary shaft (6) is interposed between the output shaft (52) and the rotary shaft (6).

Abstract: A method of manufacturing a semiconductor device comprising a ceramics cylinder, a metal seal member closing an open end of the cylinder, a semiconductor element located within the cylinder and having electrodes, and leads or electrodes connected to the electrodes of the semiconductor element and extending from the cylinder. The method comprises the steps of coating powder of active metal consisting of Ti and/or Zr on the end face of the ceramics cylinder without heating the ceramics cylinder, in an amount of 0.1 mg/cm.sup.2 to 10 mg/cm.sup.2, mounting a layer of brazing filler metal on the end face of the ceramics cylinder, which have been coated with the powder of the active metal, placing the metal seal member on the layer of brazing filler metal, and heating the ceramics cylinder, the metal seal member, and the layer of brazing filler metal, thereby melting the layer of brazing filler metal and, thus, brazing the metal seal member to the open end of the ceramics cylinder.