| Patent Number |
Title Of Patent |
Date Issued |
| 7124839 |
Impact driver having an external mechanism which operation mode can be selectively switched betw |
October 24, 2006 |
| An impact driver in which a drill mode can be selected without fail is provided. In a hammer case, a connecting sleeve is provided so as to be slidable back and forth. At the backward position, the connecting sleeve engages with only a first engaging tooth provided on the outer circu |
| 7121361 |
Electric power tool with improved speed change gearing |
October 17, 2006 |
| A battery-operated driver-drill (1) includes an epicycle reduction gear unit (8) which encases a switchover sleeve (26) having inner teeth (27) and outer teeth (28). The gear unit (8) is rotatably mounted on second and third internal gears (19, 20) and integrally slidably connected with |
| 7109675 |
Power tools |
September 19, 2006 |
| Battery-powered tools may include battery 1 or battery pack BP and a drive source (e.g., motor M) for generating power using current supplied from the battery. A switch 3 may electrically connect the battery to the drive source. A voltage detector may detect the output battery voltage of |
| 7106027 |
Battery changers |
September 12, 2006 |
| Battery pack (50) may include rechargeable batteries (55) and first temperature sensor TM1 for detecting the temperature of batteries (55). Battery charger (10) may include power source circuit (32) for supplying charging current to batteries (55) of battery pack (50). Battery charger |
| 7096973 |
Power tool |
August 29, 2006 |
| It is an object of the invention to provide a technique for further improving the vibration reducing performance in the power tool, while avoiding complicating the construction of the power tool. According to the present invention, a representative power tool may comprise a striker, |
| 7093951 |
Electrical power tool with improved visibility in darkness |
August 22, 2006 |
| A battery-operated electric power tool (1) includes a light unit (11) disposed on the front end of the main housing (2) and extending along the underside of the gear housing (6). The light unit (11) includes a light source (12) in a casing with the light emitting end of the light source |
| 7091699 |
Rechargeable battery devices |
August 15, 2006 |
| Battery pack 10 may include rechargeable battery 12 and remaining capacity indicating circuit 14 for indicating the remaining capacity of the battery 12. Remaining capacity indicating circuit 14 may be coupled to the battery 12 via first switch SW1. When first switch SW1 is turned ON, |
| 7089671 |
Circular saw with an improved lower blade guard |
August 15, 2006 |
| A circular saw (1) includes a base plate (2) and a saw blade assembly (3) including a lower blade guard (9) for covering a saw blade (6). The blade guard includes a sleeve portion (10) rotatably fitted on a bearing box (8) coupled to the saw blade assembly and a sectoral portion (11) |
| 7084779 |
Power tool |
August 1, 2006 |
| The power tool is equipped with a radar for transmitting radio waves towards an area in a vicinity of a rotating tool and for receiving reflected radio waves reflected from a radio wave reflector existing within the area. From the reflected radio waves received by the radar, a distan |
| 7070081 |
Driver guides for use with fastener-driving tools and fastener-driving tools having such driver |
July 4, 2006 |
| A driver guide for use with a fastener-driving tool has a first guide member mounted to the tool body of the fastener-driving tool. A mount device is coupled to the first guide member and serves to mount a second guide member to the first guide member. A fastener guide channel is def |
| 7064519 |
Battery charger with improved terminal protection |
June 20, 2006 |
| A charger (1) includes a connecting portion (5) provided in an upper case (3) of the charger. The connection portion (5) includes a pair of guide rails (6) to which a battery pack (40) is slidably attached. The charger further includes between the guide rails (6) a terminal block having |
| 7061209 |
Battery chargers |
June 13, 2006 |
| Battery pack (10) may include rechargeable battery cells (12). Battery charger (20) may include power source circuit (100). Power source circuit (100) may be connected with an external power source and battery cells (12). The external power source may supply power to the power source |
| 7059425 |
Reciprocating power tool |
June 13, 2006 |
| It is an object of the present invention to provide a reciprocating power tool having a further improved power transmission mechanism for converting a rotating output of a driving motor into linear motion in the axial direction of the tool bit. According to the present invention, a r |
| 7053567 |
Power tools |
May 30, 2006 |
| It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor that drives the tool |
| 7047854 |
Power tools |
May 23, 2006 |
| Power tool 1 may include table 5 on which work W is positioned. A portion of a circular blade 3 protrudes above table 5. Circular blade 3 may be driven by a motor. The motor may be controlled by a control device 90. Work W is cut by means of an operator sending work W positioned on an |
| 7045989 |
Methods and apparatus for managing a plurality of charging devices via a network |
May 16, 2006 |
| A plurality of charging devices 30 may be connected to a computer 10, 110 via a network 60. When computer 10 receives chewing information from a charging device 30 before performing a charging operation, computer 10 may compute the optimal charging period based upon the charging info |
| 7036605 |
Power tools |
May 2, 2006 |
| A detector is disclosed that detects impact sounds, e.g., a hammer striking an anvil or oil pulses from an oil unit. The detector may comprise a receiver that selectively converts sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within t |
| 7030590 |
Apparatus for refreshing batteries |
April 18, 2006 |
| Battery charger (10) may include a power source circuit (22) for charging rechargeable batteries (58) when a battery pack (50) is connected directly to the battery charger or is connected thereto with an adapter (30) interposed therebetween. The adapter may include a discharging circ |
| 7009552 |
Radar device and method of measuring distance and reflecting factor |
March 7, 2006 |
| A radar device for measuring distance within short range is provided. The radar device has a first wave-detecting circuit for multiplying radio wave voltage being transmitted from a transmitting antenna by radio wave voltage being received by a receiving antenna, in addition, the device |
| 7007762 |
Power tool |
March 7, 2006 |
| It is an object of the present invention to provide a technique to increase efficiency of the output torque of the blushless motor to drive a power tool. A representative power tool may comprise a tool bit, a brushless motor to drive the tool bit, a battery to operate the brushless m |
| 7000294 |
Fastener driving tools |
February 21, 2006 |
| A fastener driving tool includes a tool body. A driver guide is coupled to the tool body and defines a fastener driving channel though which fasteners are driven out. A magazine is coupled to the driver guide and serves to store the fasteners. A detecting device serves to detect when |
| 6997091 |
Circular saw |
February 14, 2006 |
| A circular saw includes a table having an upper surface for placing a workpiece thereon. A saw unit has a saw blade mounted thereon and is supported on the table such that the saw unit is movable in a horizontal direction parallel to the upper surface of the table and is movable in a |
| 6983810 |
Electric power tool with improved speed change gearing |
January 10, 2006 |
| A battery-operated driver-drill (1) includes an epicycle reduction gear unit (8) which encases a switchover sleeve (26) having inner teeth (27) and outer teeth (28). The gear unit (8) is rotatably mounted on second and third internal gears (19, 20) and integrally slidably connected with |
| 6981779 |
Power tools |
January 3, 2006 |
| It is an object of the present invention to provide a technique for making the effective use of cooling air for a motor within a power tool in order to rationalize the structure of the power tool. The representative power tool may have a tool bit case, a tool bit, a drive motor and a coo |
| 6971455 |
Hammer drill with a mechanism for preventing inadvertent hammer blows |
December 6, 2005 |
| A hammer drill (1) includes a lock plate (35) forward of a boss sleeve (13) and a swash bearing (14) which cooperates with the boss sleeve to convert the rotation of an intermediate shaft (5) on which the boss sleeve is mounted. The lock plate is mounted on the boss sleeve and selectivel |
| 6968908 |
Power tools |
November 29, 2005 |
| Power tool (11) may include a motor and oil pulse unit (22) that generates an elevated torque. Oil pulse unit (22) may be coupled to the motor and have output shaft (18). When load acting on output shaft (18) is less than a predetermined value, rotating torque generated by the motor is d |
| 6959631 |
Power tools |
November 1, 2005 |
| Power tool 1 may include table 5 on which work W is positioned. A portion of a circular blade 3 protrudes above table 5. Circular blade 3 may be driven by a motor. The motor may be controlled by a control device 90. Work W is cut by means of an operator sending work W positioned on an |
| 6933689 |
Power tools |
August 23, 2005 |
| It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor that drives the tool |
| 6918331 |
Lighted cutting tools |
July 19, 2005 |
| A cutting tool includes a saw blade and a blade case adapted to cover the saw blade. A light may have a light for illuminating a portion of a workpiece that will be cut by the saw blade during a cutting operation. The light may be mounted within the blade case, so that the light is l |
| 6907943 |
Electric hammer |
June 21, 2005 |
| It is, accordingly, an object of the present invention to provide an electric hammer with improved construction, while ensuring the vibration reduction performance. According to the present invention, a representative electric hammer may include a hammer bit, a driving motor, a crank |
| 6892611 |
Screwdriver |
May 17, 2005 |
| It is an object of the invention to provide an electric screwdriver that can efficiently transmit torque for tightening a screw and stop the torque transmission. A representative screwdriver may include a motor, first and second rotating members, a tool, a torque transmission spring and |
| 6892459 |
Reciprocating cutting tools having devices for limiting scattering of cutting chips |
May 17, 2005 |
| Reciprocating cutting tools (1, 90, 100) may include a drive source (11) for reciprocally driving a blade (B). The drive source may also drive a blower (13) in order to generate an air stream. An air channel (50, 56, 50, 70, 85, 80) may guide the air stream to a position adjacent to the |
| 6891457 |
Power tools |
May 10, 2005 |
| Power tool (10) may include solenoid coil (1) that functions as a drive source for plunger (5). Battery (3) may be connected with solenoid coil (1), battery (3) supplying a current to solenoid coil (1). Solenoid coil (1) may store magnetic energy while current from battery (3) flows thro |
| 6887176 |
Torque transmission mechanisms and power tools having such torque transmission mechanisms |
May 3, 2005 |
| A torque transmission mechanism includes a drive shaft (31; 51; 84) and a driven shaft (32; 52; 87). The drive shaft rotates about an axis. The driven shaft extends along substantially the same axis as the drive shaft. A torque accumulator (35; 53; 90) serves to accumulate a rotational t |
| 6886961 |
Power tools having wire guides for lights |
May 3, 2005 |
| Power tools (1) may include an electric motor (11) disposed within a housing (5). A lighting device (20) may be mounted on the housing and may serve to illuminate the area around a tool bit and/or a portion of a workpiece (W) that will be machined by the tool bit. An electric light ( |
| 6886259 |
Circular saw with improved cutting depth adjustment |
May 3, 2005 |
| A circular saw (1) includes a base (2) and a main body (3) mounted on the base and provided with an upper blade guard (7). Disposed behind the upper blade guard (7) is a stopper (22) which includes an upper curved portion (23) and an lower portion (24) coupled to the curved portion (23). |
| 6851343 |
Screwdriver |
February 8, 2005 |
| A representative screwdriver may comprise a motor, a body, a first spindle, a first clutch member, a tool bit, a second spindle, a second clutch member, a clutch engagement preventing member. The representative screwdriver may be selectively operated in one of a first power transmiss |
| 6783886 |
Battery pack with an improved cooling structure |
August 31, 2004 |
| A battery pack (1) includes an outer enclosure (2) and a forked air passage (72) for introducing cooling air via the intake port (9) formed in an outer enclosure (2), sending the air between cell groups (70) and (71) which contain cells (14a-14f), and discharging it from the outer enclos |
| 6764256 |
Angle drills having rotary handles |
July 20, 2004 |
| An angle drill includes a housing that accommodates a motor. The angle drill also includes a handle that is adapted to be held by an operator during a drilling operation. The handle is coupled to the housing such that the handle can rotate relative to the housing. |
| 6742601 |
Battery powered tools |
June 1, 2004 |
| A power tool (1) includes a tool body (3) on which a battery (10) as a power source is mounted. A switch (7) is electrically connected to the battery for supplying power to a motor (6) that is disposed within the tool body. An ON lock mechanism (12,20) serves to lock the switch in an ON |
| 6735876 |
Blade clamps suitable for reciprocating power tools |
May 18, 2004 |
| Blade clamps (26, 110) may reliably secure blades (22) to reciprocating power tools (10). The power tools may include a reciprocating drive shaft (24) partially extending from the tool housing (12). A first end of a rod (37, 112) may be attached to the drive shaft. A second end of the ro |
| 6725945 |
Impact tool with improved operability |
April 27, 2004 |
| An impact driver (1) includes a main housing (2) encasing a motor (5); an internal gear case (8) which is secured by screws to the main housing (2) and is provided with an externally threaded portion (12); and a hammer case (13) with an internally threaded portion (14) which is adapted f |
| 6708778 |
Hydraulic unit with increased torque |
March 23, 2004 |
| A hydraulic unit includes a case, a liner contained in the case, and a top cap and an opposing bottom cap plugged at the front and rear ends of the case. The unit further includes a spindle disposed in the liner and provided with a large diameter section. The large diameter section has a |
| 6708411 |
Circular saw with improved corner cutting |
March 23, 2004 |
| A circular saw (1) cutting a workpiece at a generally right-angled corner formed between the workpiece and a structure is provided. The saw (1) includes a base plate (2) and a saw blade assembly (3) which has a saw blade (5) rotatably attached thereto and is tiltably mounted on the base |
| 6687567 |
Power tools |
February 3, 2004 |
| Power tool (1) may include a drive source (22). A device for generating an elevated torque, such as a hammer (4) and anvil (2), may be operably coupled to the drive source. Further, a trigger switch (48) may energize the drive source. Preferably, a sensor (30) detects when the hammer has |
| 6681493 |
Circular saws having bevel angle setting mechanism |
January 27, 2004 |
| Portable circular saws are taught that may include a base and a saw unit pivotally coupled to the base. The saw unit may have a circular saw blade that is adapted to laterally pivot relative to the base. A stopper may be provided to allow an operator to selectively stop the saw unit at a |
| 6675999 |
Fastener driving tools having improved drive mode change devices |
January 13, 2004 |
| A fastener driving tool includes a fastener drive mechanism and a trigger that is movable from an OFF position to an ON position for actuating the fastener drive mechanism. A mode change device is operable to selectively change a tool mode among a first drive mode, a second drive mode an |
| 6625892 |
Reciprocating cutting tools |
September 30, 2003 |
| A reciprocating cutting tool (1, 50) includes a slider (14, 51) that reciprocates linearly in a first direction. A rod or blade holder shaft (21) is movable with the slider (14, 51) in the first direction and is supported by the slider (14, 51) such that the rod or blade holder shaft |
| 6616295 |
Lighting devices for power tools |
September 9, 2003 |
| A lighting device includes a mount adapted to be attached to a power tool. A flexible support extends from the mount and permits the lighting device to be oriented in any desired direction. A fluorescent lamp is mounted on the flexible support opposite to the mount. An electric circuit s |
| 6612039 |
Blade mounting devices |
September 2, 2003 |
| A tool-less blade clamps (10, 50) may include a rod (2, 52) having a slot (2a, 2c, 52c) and a guide slot (2b, 52b) formed substantially perpendicularly to the slot (2a, 2c, 52c). A control member (20, 56) may be slidably disposed within the slot (2a, 2c, 52c) and a spring (21, 57) pr |
