| Patent Number |
Title Of Patent |
Date Issued |
| 6145727 |
Pneumatic tool |
November 14, 2000 |
| A pneumatic tool, such as a nailer, includes a housing, a cylinder disposed within the housing, and a piston slidably movable within the cylinder. The piston has a driver for driving fasteners, such as nails. An upper piston chamber and a lower piston chamber are defined within the cylin |
| 6142242 |
Percussion driver drill, and a changeover mechanism for changing over a plurality of operating m |
November 7, 2000 |
| A pair of stoppers (47) capable of moving back and forth in an axial direction of a spindle (5) are provided on an outer periphery of a tubular portion (9a) for supporting the spindle (5). As a pair of projections (49) provided on a first change ring (32) are moved in conjunction with th |
| 6105450 |
Speed change device for power tool |
August 22, 2000 |
| A speed change device, preferably for a power tool, may include a first drive gear and a second drive gear mounted on a drive shaft, and may include a first driven gear and a second driven gear mounted on a driven shaft. When the second drive gear is in a first position, a first gear |
| 6075347 |
Battery charger and charging method |
June 13, 2000 |
| A battery charger and a charging method capable of charging a battery for a short period of time while suppressing battery temperature from rising. The current temperature of the battery is detected (in step S12) and a temperature rise is calculated from the detected temperature (in step |
| 6073705 |
Power-driven striking tool having a mechanism for setting the circumferential angle of tool bits |
June 13, 2000 |
| There is provided a power-driven striking tool including: a casing; a tool holder rotatably supported inside the casing and having a front end to which a tool bit is attached; and an operating member fitted around the tool holder and exposed to the outside of the tool so as to be manuall |
| 6073529 |
Miter circular saw with an improved workpiece support fence |
June 13, 2000 |
| A miter circular saw includes a base on which a workpiece is placed, a tiltable saw blade assembly mounted on the base, and a work support fence that includes a fixed element with a first support surface and a movable element with a second support surface, both of which are mounted on th |
| 6066938 |
Charging system including a charger and an electric power tool operating on an internal battery |
May 23, 2000 |
| A battery-charging system is provided that does not require removal of batteries from an impact screwdriver (1) for recharging. The battery-charging system includes the impact screwdriver and a charger (20). The impact screwdriver (1) has a nose (3a) to which a tool bit is attached. |
| 6060850 |
Electric motor control circuit |
May 9, 2000 |
| An electric motor control circuit that prevents lowering of a motor's rotation speed when a load is applied in the case where a rotation speed is adjusted within a range that doesn't exceed a predetermined upper limit of rotation speed. When a base current of a transistor Q1 starts to fl |
| 6050847 |
Cord guard |
April 18, 2000 |
| The cord guard 1 having a cylindrical hollow passage 5 into which a cord 3 can be inserted and a flange portion 11 at one end which is retained by a cord guard retainer 9 in a half housing 7. The cord guard 1 further having a tapering wall portion 13 the wall thickness of which is gradua |
| 6009782 |
Table saw |
January 4, 2000 |
| A table saw has a motor driven rotary blade disposed in a blade case and vertically adjustable with respect thereto. During cutting, wood chips are expelled from the blade case even when the rotary blade is vertically disposed away from a bottom of the blade case. An air current, provide |
| 5988034 |
Blade mounting device in cutting tool |
November 23, 1999 |
| A blade mounting device is operable for mounting a blade on a drive shaft of a cutting tool which is moved in a predetermined motion for a cutting operation. The blade mounting device includes an operation knob mounted on a body of the cutting tool and adapted to be rotated by an operato |
| 5988025 |
Screw feeding device in continuous screw driving tool |
November 23, 1999 |
| A screw feeding device in a continuous screw driving tool includes a casing mounted on a tool body of the continuous screw driving tool. A feeder box is reciprocally movable within the casing, so that a screw carrying belt is fed by a distance corresponding to one pitch of screws carried |
| 5954108 |
Drive unit for a vertical blind |
September 21, 1999 |
| A drive unit for a vertical blind having a housing with a louver traverse drive shaft with a loop string wound therearound, a louver tilt drive shaft with a loop chain wound therearound, a louver open detection means with a slider and a switch to be turned on and off by the slider, and a |
| 5947210 |
Power screwdriver |
September 7, 1999 |
| A power screwdriver has a tool body, a motor, a drive member rotatably driven by the motor, a spindle rotatably mounted on the tool body and a clutch mechanism provided between the drive member and the spindle. The clutch mechanism includes an engaging clutch and a synchronizer device. |
| 5931072 |
Circular saw with an improved dust collector |
August 3, 1999 |
| A dust collection nozzle (12) is provided through the upper blade guard 7 of a circular saw (1). The dust collection nozzle (12) includes a flared, horn-shaped dust capturing section (13) having a rectangular opening at the front end thereof, and a cylindrical dust outlet tube (14) conne |
| 5927171 |
Bench circular saw machine |
July 27, 1999 |
| A bench circular saw machine for cutting a material including a base upon which the material is supported, an arm interconnected to the base, a tube member, and a main body having a circular saw for cutting the material and a motor operatively associated with the circular saw for driving |
| 5915795 |
Chain saw braking device |
June 29, 1999 |
| A chain saw brake device that can instantly halt the rotation of a cutting chain when a motor drive switch is turned off. The chain saw brake device includes a brake band wound around a brake drum, such that by operating a hand guard and pulling the forward end of the brake band, the bra |
| 5912546 |
Battery charger for battery packs |
June 15, 1999 |
| A protection arrangement for a battery charger of the type used to charge battery packs used for electromotive tools. A self-holding protector is arranged in the neighborhood of an inserting hole of the battery charger for receiving a storage battery pack 50 to be charged. This self-hold |
| 5909101 |
Battery charger detecting full charge of batteries using a thermostat and thermistor in a batter |
June 1, 1999 |
| A battery charging system is disclosed for charging two different types of battery packs, a known three terminal type including batteries and a thermostat switch, and a newer four terminal type further including a thermistor for sensing battery temperature. A charging control circuit |
| 5904079 |
Screw feeding device in continuous screw driving tool |
May 18, 1999 |
| A screw feeding device in a continuous screw driving tool includes a casing mounted on a tool body of the continuous screw driving tool. A feeder box is reciprocally movable within the casing and a ratchet arm is reciprocally pivotable as the feeder box is reciprocally moved. An inte |
| 5873418 |
Percussive tool having a reduced impact at the start of percussive operation |
February 23, 1999 |
| A percussive tool generates a reduced impact at the start of percussive operation following idling operation. The percussive tool has a cylinder containing a piston, an air chamber in front of the piston, and a striker disposed in front of the air chamber. A slide sleeve and a rimmed rin |
| 5871059 |
Mechanism for preventing idling strikes in power-driven striking tools |
February 16, 1999 |
| The present invention realizes effective recoil reduction and idling strike prevention with a minimum constitution. In a tool holder (6), a thermal-resistant O-ring (22) is arranged between two steel washers (21,23) near the joint to the barrel (5). The O-ring (22) has a cross-sectio |
| 5870939 |
Circular saw |
February 16, 1999 |
| A circular saw has a table for placing a work to be cut thereon and has a saw unit slidably supported on the table by means of a slide mechanism. A slide stopper mechanism is adapted for fixing the saw unit in position in a sliding direction and has a slide stopper operation member dispo |
| 5860854 |
Belt sander with a lateral drift prevention device |
January 19, 1999 |
| A belt drift control device (20) is mounted in the side wall (2a) of belt sander (1) comprises a shoulder bolt (22) threaded through a nut 21 in the side wall (2a). A generally conical, tapered roller (23) is rotatably engaged with the free end of the shoulder bolt (22). The tapered roll |
| 5842527 |
Hammer drill with a mode change-over mechanism |
December 1, 1998 |
| A hammer drill has a mode change-over mechanism including a change link with a horizontally elongated slot, an eccentric pin projecting from a mode selector switch and penetrating the slot. The change link is moved vertically by rotating the mode selector switch, which in turn vertically |
| 5839339 |
Miter saw |
November 24, 1998 |
| A miter saw includes a support mechanism for supporting a miter saw unit relative to a base in such a manner that the miter saw unit is both vertically and laterally pivotable. A position determining mechanism serves to selectively determine the position of the saw unit at any of pos |
| 5823085 |
Miter saw |
October 20, 1998 |
| A miter saw includes a miter saw for placing a work thereon, a miter saw unit having a saw blade mounted thereon, and a support mechanism for supporting the miter saw unit for rightward and leftward pivotal movement relative to the base. The support mechanism includes a first member on o |
| 5816378 |
Claw clutch with a positioning mechanism |
October 6, 1998 |
| A clutch cam (9) with mating claws (17) is fitted into the bottom end of a driven pulley (6) through which a driven shaft (10) is inserted. The clutch cam (9) has upwardly tapered guide portions (18) and slide grooves (20) formed on the inner wall thereof. A cam sleeve (12) is fitted ove |
| 5806374 |
Operation switch device for use with lawnmower |
September 15, 1998 |
| An operation switch device for use with a lawnmower includes a switch and a first operation member operably movable between an "ON" position and an "OFF" position. A second operation member is mounted on the first operation and is positionable in a first position where the switch is |
| 5806191 |
Hedge trimmer |
September 15, 1998 |
| A hedge trimmer includes a motor and a cutting mechanism driven by the motor. A clutch mechanism is interposed between the motor and the cutting mechanism. A first and a second handle are provided to be grasped with both hands of an operator. A clutch control mechanism is provided for |
| 5803147 |
Vertical blind |
September 8, 1998 |
| To avoid entanglement when a vertical blind is opened and closed, an attachment member is secured to a lead carrier and engages with an operation shaft. The attachment member is composed of a body having a length half the width of the lead carrier, and a snap detent projects from one |
| 5799856 |
Fastener driving tool |
September 1, 1998 |
| A fastener driving tool includes a fastener driving device for driving fasteners one after another. The fasteners are connected in series to each other to form a strip of fasteners. A fastener feeding device is provided for feeding the fasteners one after another to a driving position by |
| 5791057 |
Electromotive chain saw |
August 11, 1998 |
| The chain of an electromotive chain saw is quickly stopped by the combined use of an electric brake and a mechanical brake when a trigger member is turned off. The rear end of a brake band disposed to tighten a brake drum by operating a hand guard is secured to a bent rod. When the trigg |
| 5782153 |
Desk-top circular saw including chip discharging means |
July 21, 1998 |
| In a desk-top circular saw comprising a base, a turntable mounted on the base, an arm provided on the rear of the base, and a saw blade assembly pivotally attached to the upper end of the arm with a pivot shaft, a horizontal cylinder is provided in the arm between the pivot shaft and a |
| 5775441 |
Power driven striking tool |
July 7, 1998 |
| An airflow regulation arrangement for regulating the impact of the strikes delivered from a striking member (6) to an intermediate member (10) and a bit, thus reducing the vibration, and also for regulating the impact of recoils of the striking member (6) is disclosed for use in an elect |
| 5775440 |
Hammer drill with an idling strike prevention mechanism |
July 7, 1998 |
| A hammer drill has an aluminum cylinder non-rotatably mounted in a crank housing, a synthetic resin slide sleeve, and a tool holder. The latter two members are coaxially fitted over the front part of the cylinder. The slide sleeve is a cylindrical member slidably mounted between a large |
| 5769657 |
Attachment structure of battery pack to power-driven tools |
June 23, 1998 |
| A simple attachment structure of the present invention ensures favorable connection of a battery pack with a battery holder in a power-driven tool over a long time period without causing any defective contact. A pair of side slots (47a,47b) as well as a pair of insertion slots (48a,48b) |
| 5768967 |
Slide bar mounting mechanism in slide-type circular saw and method of mounting slide bars |
June 23, 1998 |
| A slide-type circular saw includes a turntable rotatable relative to a base, and includes a saw unit having a saw blade mounted thereon. The saw unit is slidably movable relative to the turntable by a plurality of slide bars extending in parallel with each other. A slide bar mounting mec |
| 5765463 |
Blade mounting device in cutting tool |
June 16, 1998 |
| A blade mounting device is operable for mounting a blade on a drive shaft of a cutting tool which is moved in a predetermined motion for a cutting operation. The blade mounting device includes an operation knob mounted on a body of the cutting tool and adapted to be rotated by an operato |
| 5753995 |
Device for indicating wear on a motor brush |
May 19, 1998 |
| To inform a user of wear on a carbon brush for a motor earlier than when the carbon brush is actually required to be replaced with a new brush. In a motor brush wear indicating device, a metal terminal is attached to a brush holder, being opposed to the inside of a holder shank of the br |
| 5736837 |
Battery charging device for battery driven tool |
April 7, 1998 |
| A battery charging device for use with a battery driven tool has a power source circuit and an interlock switch provided in the power source circuit. The battery charging device includes an operation panel having an operation key insertion opening and a charging plug insertion opening |
| 5731651 |
Rotor for an electromotive tool motor |
March 24, 1998 |
| A motor rotor for use in a grinder or other electromotive tool in which a motor winding is prevented from being damaged by collisions with particles. The motor rotor is composed of a core having sixteen teeth extending radially relative to a rotation shaft and slots formed among the |
| 5725304 |
Battery concrete vibrator |
March 10, 1998 |
| A concrete vibrator 10 having a direct current motor 3 and a battery pack 19 mounted in a handle housing 17. The battery pack 19 is attached to a hook 75 provided in an opening of the handle housing 17, and a battery cover 80 is attached to completely cover the battery pack 19. Air inlet |
| 5720423 |
Fastener driving tool |
February 24, 1998 |
| A fastener driving tool includes a cylinder and a drive piston reciprocally movable within the cylinder. A driver is connected to the drive piston and is operable to drive fasteners when the drive piston is moved in a driving direction. The drive piston defines a gas chamber in the cylin |
| 5711379 |
Hammer drill |
January 27, 1998 |
| A hammer drill includes a spindle supported by a housing and movable in an axial direction relative to the housing within a predetermined range, a motor for rotating the spindle, a rotary cam member fixedly mounted on the spindle, a clutch cam member which supports a weight member is axi |
| 5709391 |
Bit mounting device |
January 20, 1998 |
| A bit mounting device is adapted for removably mounting a bit on a tool which has a barrel including a mounting hole adapted for receiving the bit. The bit mounting device includes an engaging member engageable with the bit and a control member mounted on the barrel. The control member i |
| 5709032 |
Chain stop device for an electromotive chain saw |
January 20, 1998 |
| To provide a chain stop device for an electromotive chain saw that can quickly stop the rotation of a cutting chain when a trigger member is released. The electromotive chain saw is provided with a chain stop mechanism operated with a solenoid. When the trigger lever is released, the |
| 5701676 |
Portable rotary saw |
December 30, 1997 |
| A portable rotary saw includes a cooling fan fastened to the output shaft of a motor and a plurality of ports provided downstream of the fan in a blade case defining a blade chamber. The ports allow the cooling air delivered by the fan to blow further downstream in the housing of the |
| 5692574 |
Vibrating tool and a vibration isolating ring |
December 2, 1997 |
| In a vibrating tool, a body housing and a handle are displaceably interconnected and a large range of vibrations can be effectively absorbed. A vibrating tool is composed of a body housing and a handle. A projection is provided at the rear end of the body housing. By engaging a stop |
| 5687624 |
Continuous screw driving tool |
November 18, 1997 |
| A continuous screw driving tool includes a body having a rotatably spindle for mounting a driver bit thereon. A feeder box having a screw feeding device for feeding a screw carrying belt is movable relative to a case which is fixed to the body. A stopper base is adapted to be mounted on |
