| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6607041 |
Power tools |
August 19, 2003 |
| Power tools are taught that may include, for example, means for detecting impact sounds generated, e.g. by a hammer strikes an anvil or by oil pulse from an oil unit. The detecting means may include a receiver (30) adapted to selectively convert sound within a narrow frequency range into |
| 6603288 |
Battery chargers and charging methods |
August 5, 2003 |
| A battery charger and a charging method capable of charging a battery are described. The current temperature of the battery is detected (in step S12) and a battery temperature increase rate is calculated based upon the detected temperature (in step S14). An allowable current value is the |
| 6601305 |
Circular saws having blade angle adjusting mechanisms |
August 5, 2003 |
| A portable circular saw includes a base and a saw unit having a circular saw blade. The saw unit is coupled to the base, so that the saw unit can laterally incline relative to the base. The saw unit can be fixed in a lateral inclining position relative to the base by a tightening device. |
| 6598684 |
Impact power tools |
July 29, 2003 |
| Power tools (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. Preferably, a sensor (30) detects when the hammer has begun to strike the anvil and generate the elevated torque. |
| 6577104 |
Apparatus and methods for determining appropriate timing for recharging rechargeable batteries |
June 10, 2003 |
| When rechargeable batteries have been discharged to a selected voltage reference level, LED 29 (and/or buzzer BZ) and controller 32 may warn the operator that the rechargable batteries should be recharged. Controller 32 may change the selected reference voltage level based upon use histo |
| 6566005 |
Battery pack with an improved cooling structure |
May 20, 2003 |
| A battery pack (1) includes an air intake port (9), air discharge ports (11), first air passages (24), and a second air passage (25). Cooling air introduced into the battery pack through the air intake port (9) flows around and through two cell groups contained in the pack before exiting |
| 6563290 |
Battery pack charging system and battery pack |
May 13, 2003 |
| Charging device 10 charges nickel-hydrogen batteries 58, while adjusting the current value so that the temperature follows the target temperature rise pattern. Therefore, nickel-hydrogen batteries that demonstrate a large temperature increase can be charged within a short time so that a |
| 6540545 |
Portable tool motor housing with integral mount for electric components |
April 1, 2003 |
| A portable electric tool which miniaturizes a mold of a motor housing, reduces the costs for manufacturing the mold, extends the life of the mold, and simplifies attachment of electric equipment to a mount part of the motor housing. A flat mount part (29) extends toward the rear end of |
| 6537694 |
Battery pack with improved heat radiation and sealing |
March 25, 2003 |
| A battery pack (1) has a double casing structure, including an inner case (2) disposed inside an outer case (3). The inner case (2) includes a radiator plate (9) that is in contact with the side walls of battery cells (4) disposed within the battery pack (1). A forked air passage (32) |
| 6536537 |
Screw drivers |
March 25, 2003 |
| The present invention relates to a powered screw driver having a spindle 20 that is caused to rotate by an electric motor 10 within a range of about 5000 rpm (revolutions per minute) to about 7000 rpm (revolution per minute) when the spindle 20 idles. Because the spindle 20 rotates at a |
| 6528921 |
Power tools having separable brush holder segments |
March 4, 2003 |
| A power tool has a motor housing that comprises housing halves arranged in the circumferential direction of a motor. A brush holder is disposed within the motor housing and serves to support brushes. The brush holder comprises holder halves that are arranged in the circumferential direct |
| 6523658 |
Clutch mechanism for use in rotary tools having screw-driving and drill modes |
February 25, 2003 |
| A clutch mechanism (17) includes an internal gear (10) and a plurality of cylindrical pins (26) pressed rearward against a front end surface of the internal gear (10) by a coil spring (25) via a flat washer (24). Provided on the internal gear's front end surface are a plurality of cam |
| 6511200 |
Power tools having timer devices |
January 28, 2003 |
| Power tools are taught having a motor M1, a tool 1 coupled to the motor M1 via a tool holder 2, at least one light 4 disposed proximal to the tool 1, a switch 6 coupled to the motor M1 and the light 4, the switch 6 being capable of activation by an operator, a power supply 7 coupled to t |
| 6505690 |
Hydraulic unit and electric power tool to which the hydraulic unit is incorporated |
January 14, 2003 |
| A hydraulic unit (1) includes a case (2) having an axially slidable top cap (11) at the rear end thereof The hydraulic unit further includes a spindle (17) having communicating holes (28) axially formed therein and a column (19) which is inserted into the case. The column of the spindle |
| 6502949 |
Adapters for use with an electric power tool |
January 7, 2003 |
| An adapter (1) for an electric power tool (45) includes a main body (2) that has a light assembly and a first coupling portion (4) provided on the top surface of the main body (2), the first coupling portion (4) having a configuration identical to a coupling portion of a battery pack (31 |
| 6494590 |
Power tools having lighting devices |
December 17, 2002 |
| Lighting devices are taught for machine tools. The lighting devices may include one or more light emitters controlled by an electric circuit, which can be connected via one or more conductors to the inner circuit of an electric machine tool. The electric circuit may comprise at least one |
| 6493949 |
Chain saw with an improved chain tensioning arrangement |
December 17, 2002 |
| A chain saw (1) includes a guide bar (5) supporting a chain (7) and attached to a main body (3). Disposed within the body is an anchor bolt (9) for securing the guide bar to the main body. Disposed within a sprocket cover (8) is a hexagonal nut (11) screwed onto the anchor bolt. Furt |
| 6476584 |
Battery charger and battery charging method |
November 5, 2002 |
| A temperature rise pattern is retrieved from charging time based on the difference between a battery temperature at the beginning of battery charge and a target temperature value which a battery is intended to reach (in S116). The battery is charged while adjusting a current value so tha |
| 6447383 |
Sanding apparatus with an improved vibration insulating mechanism |
September 10, 2002 |
| A finishing orbital sander (1) includes a main body (2) and a base (12) provided below the main body. Provided between the main body and the base are a plurality of foot assemblies (22). Each assembly in turn includes a cylindrical or columnar foot (23) made of aluminum and a pair of rub |
| 6433515 |
Method of updating the charging characteristics of a charging device and a battery |
August 13, 2002 |
| Connecting to a home page via the Internet, selecting the mode of use of the battery desired by the user, downloading the charging characteristics which match the selected mode of use, and reading the charging characteristics into a EEPROM of charging device 30. Because of this, the |
| 6422115 |
Machining tools having workpiece position adjusting devices |
July 23, 2002 |
| A machine tool includes a table for placing a workpiece thereon and includes a fixing device for fixing the workpiece in position relative to the table. The fixing device may be operable in a first mode for fixing and releasing the workpiece relative to the table and in a second mode for |
| 6394191 |
Structure for accommodating a motor |
May 28, 2002 |
| A rechargeable impact screwdriver (1) includes a housing (2) and a brush holder (20). The brush holder (20) in turn includes a circular main holder body (21) and a bearing box (22) which contains a ball bearing and is coaxially and integrally formed with the main holder body (21). A pair |
| 6362600 |
Battery charging device |
March 26, 2002 |
| In a battery charging device 10 capable of detecting abnormalities in cells comprising batteries through a simple arrangement and terminating charge accordingly, cell temperature information Ta and cell temperature information Tb in charging operation within respective blocks A and B are |
| 6350149 |
Structure of electrical terminals for establishing electrical contact between a battery pack and |
February 26, 2002 |
| A battery pack (1) has two female terminals (7) each including two pairs of elastic plates (10). Each pair of elastic plates (10) are arranged symmetrically about a base plate (8). Each elastic plate (10) includes a parallel portion (11) oriented parallel to its counterpart of the paired |
| 6346793 |
Battery charger with a terminal protector |
February 12, 2002 |
| A charger (1) includes a box enclosure (2), terminals (11, 12, 13), and a protective terminal cover (14) which in turn includes a top plate (15) extending at right angles to a pair of guide rails (6). The terminal cover (14) is pivotally supported by a pair of pivot pins (17) inside the |
| 6325157 |
Striking tool with an improved cooling mechanism |
December 4, 2001 |
| A hammer drill 1 includes a barrel 2 containing a striking mechanism. The drill further includes a motor 4 with a motor shaft 6 encased in a motor accommodating chamber 19 which has an upper opening at which a baffle plate 20 is disposed. The baffle plate 20 includes a bottom portion 21 |
| 6321622 |
Structure for attaching a suspending device to an electric power tool |
November 27, 2001 |
| A screwdriver 1 includes a hook 7 which is configured to fit in an accommodating recess 20 grooved in a motor housing 4 and a handle cover 5. The hook 7 includes an extending portion 8 for being accommodated in a first groove 21 and a base block 9 for being accommodated in a second g |
| 6318874 |
Power tools having lighting devices |
November 20, 2001 |
| Power tools are taught having a motor M1, a tool 1 coupled to the motor M1 via a tool holder 2, at least one light 4 disposed proximal to the tool 1, a switch 6 coupled to the motor M1 and the light 4, the switch 6 being capable of activation by an operator, a power supply 7 coupled to t |
| 6308423 |
Cutting tool with an improved guide repositioning structure |
October 30, 2001 |
| A reciprocating saw includes a hexagonal head bolt (11) for releasably tightening a guide shoe (6) and a manually-operated bolt-tightening lever (15) fitted over the bolt (11). The bolt-tightening lever (15) includes a lock plate (17) which has at its front end a socket hole (22) that ca |
| 6305481 |
Clutch mechanism for use in a power-driven tool |
October 23, 2001 |
| A lock washer (24) presses balls (21) and pins (23) against a clutch cam (18) with protrusions (19) formed on its front face. A rear end (25a) of a spring holder (25) abuts on the inner edge of the front face of the lock washer (24) while the half of the front end surface of each pin (23 |
| 6294857 |
Structure for attaching brush holders to an electric power tool |
September 25, 2001 |
| A pair of brush assemblies 1 for use in an electric power tool each includes a brush holder 2 in which a carbon brush is inserted, a pair of elastic strips 7 protruding from the outside lower edges of the brush holder 2. The elastic strips 7 are folded back inward of the brush holder |
| 6286742 |
Nail driving tool |
September 11, 2001 |
| There is proposed a nail driving tool provided with a driver guide including an injection hole for driving a nail and a contact arm surrounding an outer surface of a forward end of the driver guide in a nail driving direction, provided with an eject hole penetrating through the conta |
| 6277013 |
Electric power tool having an improved impact cushioning mechanism |
August 21, 2001 |
| A grinder 1 includes a spindle 9 having a small-diameter section 11 and a medium-diameter section 12 and a motor shaft 5 on which a pinion gear 6 is provided. The grinder 1 further includes a bevel gear 18 which is provided on the small-diameter section 11 of the spindle 9 and engages th |
| 6269543 |
Portable saws having chip scattering prevention devices |
August 7, 2001 |
| A portable saw includes a saw unit that has a motor and a saw blade. The motor rotatably drives the saw blade. A base is adapted to rest on a workpiece to be cut. The saw unit is vertically movable relative to the base to vary a cutting depth into the workpiece. A cover prevents cutting |
| 6260460 |
Machining tools having adjustable fences |
July 17, 2001 |
| A machining tool includes a table, an adjustable fence disposed on the table, a fixing device coupled to the fence and a lever operable by an operator. The fixing device can be operated to fix the fence in position or to permit the movement of the fence relative to the table by the o |
| 6260281 |
Blade mounting devices for reciprocating cutting tools |
July 17, 2001 |
| A device for mounting a blade on a reciprocally movable blade carrier of a cutting tool includes a blade pressing member and a blade pressing surface formed on the blade carrier, so that the blade can be pressed against the blade pressing surface by the blade pressing member. A retainer |
| 6259047 |
Power tools with improved switch devices |
July 10, 2001 |
| A power tool includes a motor and a switch device for starting and stopping the motor. The switch device includes an operation member and an on-operation prevention device. The operation member can pivot about a pivotal axis between an on position and an off position and has an on-op |
| 6229280 |
Power tool charging system having a charge level indicator and charge control functions |
May 8, 2001 |
| A charging system includes an electric power tool (2) and a charger (1) having internal rechargeable batteries (6) and a controller (9) for monitoring the charge/discharge level of the batteries (6). The electric power tool (2) additionally includes a pair of charge terminals (13a, 14a) |
| 6226877 |
Sealing structure for use in an electric power tool |
May 8, 2001 |
| A reciprocating saw includes a structure for sealing a chamber (2a) which is defined by a gear housing (3) and a gear housing cover (4) fitted over the gear housing. The sealing structure includes a rubber packing (18) mounted along the entire length of the seam between the gear housing |
| 6218633 |
Switch mechanism for use in an electric power tool |
April 17, 2001 |
| An electric power blower (1) includes a handle (5) mounting therein a disk-shaped speed change dial (9) which is capable of rotation on a shaft (10). The speed change dial (9) is disposed between a speed change switch (6) and a trigger switch (8) and has a cut-out (12) formed therein thr |
| 6213224 |
Electric power tool with enhanced strength to axially-applied external force |
April 10, 2001 |
| An electric power tool is provided including a main housing (2) assembled by fitting together right and left casing halves (3, 4), a drive unit (5), a spindle (14) coupled to the drive unit, and a change ring (20). The drive unit includes a DC motor (6), a gear assembly (7), and first an |
| 6209426 |
Magnetically attractive driver bit assembly |
April 3, 2001 |
| A magnetically attractive driver bit assembly shows a strong magnetic attraction when applied to a screwing robot arm so that the operating speed of the robot arm can be increased. The magnetically attractive driver bit assembly comprises an iron driver bit having a step, formed at a |
| 6204641 |
Battery charger and charging method |
March 20, 2001 |
| A battery charger and a charging method capable of charging a battery for a short period of time while suppressing the battery temperature from rising, by incorporating in the battery charger memory a look-up table for mapping an allowable value of current with which the battery can be |
| 6199739 |
Nail guns having means for preventing the nail driving operation |
March 13, 2001 |
| A nail gun includes a contact arm that is movable relative to a nail gun body between an upper first stroke end position and a lower second stroke end position. The contact arm may prevent the nails from being driven when it is in the first stroke end position. A nail driving prevention |
| 6192996 |
Mode changing mechanism for use in a hammer drill |
February 27, 2001 |
| A hammer drill (1) includes an intermediate shaft (13), a clutch ring (25), a second gear (20), and a boss (15) all mounted on the intermediate shaft (13). Also included are a rotatable change lever (40) and a clutch plate (31) which has lock claws (36). When the change lever (40) is ful |
| 6191554 |
Power tool charging system having battery reconditioning and battery capacity data updating func |
February 20, 2001 |
| An improved charging system for preventing battery deterioration and for accurate indication of the remaining battery charge level includes an electric power tool (2) and a charger (1). The electric power tool (2) is provided with an internal rechargeable batteries (6) and a second c |
| 6176321 |
Power-driven hammer drill having an improved operating mode switch-over mechanism |
January 23, 2001 |
| A power-driven hammer drill 1 includes a rotary lever 8 for transmitting and disabling the transmission of the rotation of a motor 5 to a tool bit 4 and a slide lever 9 for transmitting and disabling the transmission of hammer blows to the tool bit 4. The rotary lever 8 is formed with a |
| 6170373 |
Circular saw having movement prevention means |
January 9, 2001 |
| A circular saw includes a table for placing a workpiece thereon, a saw unit having a circular saw blade mounted thereon, and a support mechanism for supporting the saw unit on the table, so that the saw unit is movable in forward and rearward directions. A lock device includes a lock mem |
