Abstract: A semiconductor device manufacturing method is a method of forming a semiconductor device that includes a cell part that includes plural transistor cells in each of which a gate of a trench type is formed in a semiconductor layer, and diffused layers are formed on both sides of the gate, and a guard ring part that surrounds the cell part. The semiconductor device manufacturing method includes forming an interlayer dielectric film on a surface of the semiconductor layer in which the gate and the diffused layers are formed; reducing a thickness of the interlayer dielectric film formed in the cell part through etch back; forming a contact part having a shape of a hole or a groove in the interlayer dielectric film at a position above the diffused layer; and forming a metal film on the interlayer dialectic film.

Abstract: A hydraulic vehicle provided with a running-system hydraulic unit 10 that includes a hydraulic pump 11 being configured to be driven by an engine E, a hydraulic motor 12 being configured to be driven by pressure oil discharged from the hydraulic pump 11, and a pair of running-system oil passages 13a and 13b connected between the hydraulic pump 11 and the hydraulic motor 12 for forming a closed circuit. The hydraulic vehicle is configured to be driven by the hydraulic motor 12 for running. The hydraulic vehicle includes: a backup pump 40 being configured to be driven by the engine E; a backup control valve 30, a backup oil passage 47, a high-pressure selection valve 47b that are configured to allow pressure oil discharged from the backup pump 40 to flow to one of the running-system oil passages that is higher in pressure than the other.

Abstract: In a hydraulic piston pump, a cylinder port can communicate with a discharge port after a system pressure and a chamber pressure in a cylinder bore becomes in an equilibrium condition. A through hole opening to a surface on which a cylinder block slides in a valve plate is allowed to communicate with a side of one end surface of a balance valve, and the system pressure of a discharge port side is supplied to the other end surface of the balance valve. In the balance valve, a balance piston which slides by a pressure difference between the chamber pressure of the cylinder bore and the system pressure is accommodated. Before the cylinder port communicates with an oil guiding groove, the chamber pressure can be equilibrated to the system pressure by an activation of the balance piston.

Abstract: A semiconductor device manufacturing method is a method of forming a semiconductor device that includes a cell part that includes plural transistor cells in each of which a gate of a trench type is formed in a semiconductor layer, and diffused layers are formed on both sides of the gate, and a guard ring part that surrounds the cell part. The semiconductor device manufacturing method includes forming an interlayer dielectric film on a surface of the semiconductor layer in which the gate and the diffused layers are formed; reducing a thickness of the interlayer dielectric film formed in the cell part through etch back; forming a contact part having a shape of a hole or a groove in the interlayer dielectric film at a position above the diffused layer; and forming a metal film on the interlayer dialectic film.

Abstract: A hydraulic vehicle provided with a running-system hydraulic unit 10 that includes a hydraulic pump 11 being configured to be driven by an engine E, a hydraulic motor 12 being configured to be driven by pressure oil discharged from the hydraulic pump 11, and a pair of running-system oil passages 13a and 13b connected between the hydraulic pump 11 and the hydraulic motor 12 for forming a closed circuit. The hydraulic vehicle is configured to be driven by the hydraulic motor 12 for running. The hydraulic vehicle includes: a backup pump 40 being configured to be driven by the engine E; a backup control valve 30, a backup oil passage 47, a high-pressure selection valve 47b that are configured to allow pressure oil discharged from the backup pump 40 to flow to one of the running-system oil passages that is higher in pressure than the other.

Abstract: A hydraulic piston pump in which a cylinder port (4b) can be communicated with a discharge port (9) after a system pressure (Po) and a chamber pressure (Pi) in a cylinder bore are in an equilibrium state. A through-hole (16) opened in that surface of a valve plate (7) on which a cylinder block (3) slides is communicated with one end surface (21a) side of a balance valve (20), and the system pressure (Po) on the discharge port (9) side is supplied to the other end surface (21b) of the balance valve. A balance piston (21) is built-in in the balance valve, and the balance piston (21) slides by a pressure difference between the chamber pressure (Pi) in the cylinder bore (4) and the system pressure (Po). Before a cylinder port (4b) is communicated with an oil guiding groove (15), the chamber pressure (Pi) and the system pressure (Po) can be brought into an equilibrium state by actuation of the balance piston (21).

Abstract: A communication method includes re-transmitting, from a transmitter to a receiver, a packet or a plurality of packet segments formed by segmenting the packet, when the transmitter receives a re-transmission request from the receiver. The packet includes identification information and information indicating that the packet is not segmented. The packet segments include the identification information, information indicating that the packet is segmented, and information for assembling the packet segments.

Abstract: A dust collector includes: a motor functioning as a driving source; a drive unit for driving a motor; a dust collection fan rotated by the motor; a head section for accommodating the dust collection fan; a switch provided on the head section to control the starting of the motor; a tank section located below the head section, for accommodating dust conveyed by the dust collection fan, the tank section having a connecting portion; a duct hose having one end and the other end, the one end attached to the connecting portion, the other end being detachable from a portion of a power tool; a remote-control transmitter for transmitting a signal; and a remote-control receiver for receiving the signal from the remote-control transmitter to control the drive unit to start or stop the motor.

Abstract: There is provided a technology for preventing disabling of function of a clock monitoring circuit by a hacker in a microcomputer for IC card provided with a clock monitoring circuit as a countermeasure for a hacker. In the microcomputer for IC card provided with the clock monitoring circuit, the clock monitoring circuit is given the function to perform the detecting operation twice during one cycle, namely at the timings of rise and fall of the clock.

Abstract: A power tool includes a linear motor and a maximum reciprocal movement amount setting unit. The linear motor has a movable member driven to move reciprocally and a tool connector for connecting work bits to the movable member. The maximum reciprocal movement amount setting unit is for setting maximum reciprocal movement amount at which the linear motor drives movement of the movable member to a selected one of a plurality of maximum reciprocal movement amounts. Also, a position information region is provided on the movable member. A movable member region detector detects the movable member position information region of the movable member and a control unit sets, as the initial position of the movable member, position of the movable member at the time the movable member region detector detects the movable member position information region.

Abstract: A power tool includes a linear motor and a maximum reciprocal movement amount setting unit. The linear motor has a movable member driven to move reciprocally and a tool connector for connecting work bits to the movable member. The maximum reciprocal movement amount setting unit is for setting maximum reciprocal movement amount at which the linear motor drives movement of the movable member to a selected one of a plurality of maximum reciprocal movement amounts. Also, a position information region is provided on the movable member. A movable member region detector detects the movable member position information region of the movable member and a control unit sets, as the initial position of the movable member, position of the movable member at the time the movable member region detector detects the movable member position information region.

Abstract: There is provided a technology for preventing disabling of function of a clock monitoring circuit by a hacker in a microcomputer for IC card provided with a clock monitoring circuit as a countermeasure for a hacker. In the microcomputer for IC card provided with the clock monitoring circuit, the clock monitoring circuit is given the function to perform the detecting operation twice during one cycle, namely at the timings of rise and fall of the clock.

Abstract: A power tool includes a linear motor and a maximum reciprocal movement amount setting unit. The linear motor has a movable member driven to move reciprocally and a tool connector for connecting work bits to the movable member. The maximum reciprocal movement amount setting unit is for setting maximum reciprocal movement amount at which the linear motor drives movement of the movable member to a selected one of a plurality of maximum reciprocal movement amounts. Also, a position information region is provided on the movable member. A movable member region detector detects the movable member position information region of the movable member and a control unit sets, as the initial position of the movable member, position of the movable member at the time the movable member region detector detects the movable member position information region.

Abstract: A dust collector includes: a motor functioning as a driving source; a drive unit for driving a motor; a dust collection fan rotated by the motor; a head section for accommodating the dust collection fan; a switch provided on the head section to control the starting of the motor; a tank section located below the head section, for accommodating dust conveyed by the dust collection fan, the tank section having a connecting portion; a duct hose having one end and the other end, the one end attached to the connecting portion, the other end being detachable from a portion of a power tool; a remote-control transmitter for transmitting a signal; and a remote-control receiver for receiving the signal from the remote-control transmitter to control the drive unit to start or stop the motor.

Abstract: A power tool has a linear motor which includes a movable element having a tool mounted on its one end and having magnotic poles installed at a fixed pitch along the direction of movement, magnetic pole teeth installed in opposition to each other and at a fixed pitch along the direction of movement in a longitudinal direction of the movable element, and a coil for exciting the magnetic pole teeth so that the adjacent magnetic pole teeth and opposed magnetic pole teeth act and different poles, respectively. The power tool further has a control circuit for reciprocating the movable element by exciting the coil, thereby to work on a workpiece by using the tool in the process of this reciprocating movement.

Abstract: A power tool includes a linear motor and a maximum reciprocal movement amount setting unit. The linear motor has a movable member driven to move reciprocally and a tool connector for connecting work bits to the movable member. The maximum reciprocal movement amount setting unit is for setting maximum reciprocal movement amount at which the linear motor drives movement of the movable member to a selected one of a plurality of maximum reciprocal movement amounts. Also, a position information region is provided on the movable member. A movable member region detector detects the movable member position information region of the movable member and a control unit sets, as the initial position of the movable member, position of the movable member at the time the movable member region detector detects the movable member position information region.

Abstract: A DC power source unit includes a main unit that generates DC voltage, and an output cable. The output cable is connected, either integrally or detachably, at one end to the output of the main unit and another end to an adapter plug. The adapter plug is electrically connected to an electrically powered tool, such as an electrical drill. An output voltage switching unit switches the level of voltage supplied by the main unit to the electrically powered tool, to a level that matches the rated voltage of the electrically powered tool that corresponds to the fitting portion of the adapter plug.

Abstract: A power tool with a linear motor is disclosed. The linear motor has a movable element installing a front tool at its one end and having magnetic poles installed at a fixed pitch along the direction of the movement, magnetic pole teeth installed in opposition to each other and at a fixed pitch along the direction of the movement in a vertical direction of movable element, and a coil for exciting the magnetic pole teeth so that the adjacent magnetic pole teeth and opposed magnetic pole teeth may becomes different poles, respectively. The power tool further has a control circuit for reciprocating the movable element by exciting the coil to work something by using the front tool in the process of this reciprocating movement.

Abstract: A DC power source unit includes a main unit that generates DC voltage, and an output cable. The output cable has one end connected to the output of the main unit and another end attached to an adapter plug. The adapter plug Is electrically connected to an electrically powered tool, such as an electrical drill. Current flowing in the tool is detected every predetermined interval and accumulated electrical quantity is computed based on the detected current flowing in the tool. Based on the accumulated electrical quantity, the temperature of the tool is predicted. When it is determined that the tool is heated up to a first critical temperature based on the accumulated electrical quantity, an alarm unit is actuated. When it is determined that the tool is further heated up to a second critical temperature, supply of current to the tool is interrupted.

Abstract: A hydraulically actuated breaker with a lost-motion preventing device includes a cylinder portion (26) defining a first chamber (23) constantly communicated with a hydraulic pressure source (47) and having a small pressure receiving area for upwardly moving a piston (22) and a second chamber (24) having a large pressure receiving area for downwardly moving the piston, by inserting the piston into a piston bore (21) of a breaker main body (20); a chisel (28) inserted within a chisel insertion hole (27) of the breaker main body in opposition to the piston; a main switching valve (40) being switched between a first position (E) communicating the second chamber with a tank (48) and a second position (F) communicating the second chamber with the hydraulic pressure source; and a valve mechanism (30) placing the main switching valve at the first position when the piston is in an effective lower stroke end position, placing the main switching valve at the second position when the piston is in an effective upper strok