| Patent Number |
Title Of Patent |
Date Issued |
| D580247 |
Portable electric driver |
November 11, 2008 |
|
| D380132 |
Portable electric hammer drill |
June 24, 1997 |
|
| D367867 |
Small-sized centrifuge |
March 12, 1996 |
|
| D349029 |
Portable elecrtric hammer drill |
July 26, 1994 |
|
| D345682 |
Portable electric screwdriver |
April 5, 1994 |
|
| D343345 |
Portable electric hammer |
January 18, 1994 |
|
| D337711 |
Portable electric drill |
July 27, 1993 |
|
| D337709 |
Jig saw |
July 27, 1993 |
|
| D337499 |
Portable electric grinder |
July 20, 1993 |
|
| D335619 |
Portable electric hammer |
May 18, 1993 |
|
| D334522 |
Portable electric saw |
April 6, 1993 |
|
| D334329 |
Portable pneumatic nailer |
March 30, 1993 |
|
| D333767 |
Portable cordless hammer |
March 9, 1993 |
|
| D330152 |
Portable electric screw driver |
October 13, 1992 |
|
| D329363 |
Portable circular saw |
September 15, 1992 |
|
| D327618 |
Portable electric drill |
July 7, 1992 |
|
| D326043 |
Electric screw driver |
May 12, 1992 |
|
| D325857 |
Screw driver |
May 5, 1992 |
|
| 6330405 |
Image forming apparatus |
December 11, 2001 |
| In an image forming apparatus, the developing unit includes two developing rollers whose rotational directions are different from each other, and a bias potential of the developing roller (first developing roller) located upstream in the rotational direction of the photosensitive member |
| 6137968 |
Image forming apparatus |
October 24, 2000 |
| There are disposed optical sensors (S1, S2, S3,S4, S5, and S6) outside sheet trays (1, 2, 3). The optical axes of the optical sensors are respectively set in such a manner that they are parallel to their associated up-down tables (1a, 2a, and 3a) and pass upwardly of contact position |
| 5673758 |
Low-noise impact screwdriver |
October 7, 1997 |
| An improved structure of an impact screwdriver is provided which achieves a low-noise screw-driving operation. The impact screwdriver includes a clutch assembly for transmitting torque provided by a motor to a tool bit. The clutch assembly includes a toque-transmitting member, a torq |
| 5619422 |
Rotor temperature control system |
April 8, 1997 |
| A rotor temperature control system for a centrifuge is provided. This system includes an ambient temperature sensor for detecting ambient temperature around the system, a temperature regulating device for regulating temperature of a rotor of the centrifuge according to an operation f |
| 5610465 |
High-frequency motor |
March 11, 1997 |
| A high-frequency motor comprises a squirrel-cage rotor. The rotor comprises an iron core having a plurality of circular slots, a plurality of conductive rods inserted into the slots, and short-circuit rings disposed at both ends of the conductive rods. The conductive rods are made of |
| 5601149 |
Noise reduction mechanism for percussion tools |
February 11, 1997 |
| A percussion hammer tool comprises a spindle 1 causing rotation about an axis thereof. The spindle 1 is driven by a motor M. A hammer 3, slidably coupled with the spindle 1, generates a percussion force to rotate and hit an anvil. The anvil is divided into an engaging portion 7 engageabl |
| 5558571 |
Portable grinder |
September 24, 1996 |
| A grinder has a grinding member. The grinder includes a rotatable spindle having an engagement portion. A first flange engages the engagement portion of the spindle. The first flange and the engagement portion of the spindle define a given play therebetween in a direction of rotation. Th |
| 5522466 |
Vibration-damping structure for electric hammer |
June 4, 1996 |
| A vibration-damping apparatus for an electric hammer unit is provided. This vibration-damping apparatus is provided with the so-called transatory unit including elastic bars disposed between elastic damper members connected to a tool body and a handle of the electric hammer unit, respect |
| 5456324 |
Percussion hammer |
October 10, 1995 |
| A percussion hammer for a tool includes a rotational drive source. A motion converting mechanism is connected to the rotational drive source for convening rotational movement of the rotational drive source into reciprocating movement. A striking mechanism is connected to the motion c |
| 5346023 |
Slipping torque changing apparatus for impact tool |
September 13, 1994 |
| A slipping torque changing mechanism for an impact tool includes a driving source for generating a rotational motion. A motion converting mechanism is connected with this driving source for converting the rotational motion of the driving source into a reciprocating motion. An impact mech |
| 5342280 |
System for management of body rotation of centrifuge |
August 30, 1994 |
| A management system for use in a centrifuge equipped with a detachable rotor which is rotatable so as to separate density-different samples by a centrifugal force due to the rotation. The management system is for managing the lifetime of the rotor on the basis of the detection results |
| 5325172 |
Optical system for analyzing samples separated by a centrifugal separator |
June 28, 1994 |
| An optical system is provided with a laser device for emitting a multiplet laser beam with two types of frequencies F1, F2, and a sample rotator on which a reference sample and a test sample containing substances are set for rotating both the test sample and the reference sample to separ |
| 5220498 |
Positioning data correction apparatus with image analyzing and positioning apparatus including t |
June 15, 1993 |
| A positioning data correction apparatus with image analyzing, for producing a corrective positioning command used in a positioning device for positioning a tool along an axis with respect to a target on a work in response to a command, comprises: a receiver for receiving the command and |
| 5199626 |
Combustion gas powered tool |
April 6, 1993 |
| A combustion gas powered tool includes a member defining a part of cylindrical combustion chamber having an axis. A piston is movable in a direction along the axis of the combustion chamber. The piston defines the combustion chamber in conjunction with the member. A mixture of air and |
| 5194774 |
Electric-powered tool |
March 16, 1993 |
| An electric-powered tool comprises: a housing; and a brush motor contained in the housing, having: brush holders, each of brush holders holding a carbon brush; and brush terminals, made of an electrical conductive and elastic material having at least one blade portion, a palm portion, an |
| 5154572 |
Vacuum pump with helically threaded cylinders |
October 13, 1992 |
| A vacuum pump includes a rotatable cylinder rotatably disposed coaxially around an inner stationary cylinder and in an outer stationary cylinder. The rotatable cylinder has a plurality of recesses defined in inner and outer circumferential surfaces thereof. The outer stationary cylinder |
| 5149999 |
Power tool with improved internal wiring structure |
September 22, 1992 |
| A power tool includes an internal wiring structure having a first terminal board secured to a commutator motor stator and a second terminal board releasably engaged with the first terminal board to electrically connect terminals on the first and second terminal board. The second terminal |
| 5138916 |
Power operated screwdriver |
August 18, 1992 |
| A power operated screwdriver including a support shaft firmly secured to a motor housing, a gear driven by a motor shaft and rotatably mounted on the support shaft, a main spindle slidably mounted on the supported shaft and holding a detachable drill bit, and an intermediate clutch disc |
| 5135152 |
Pneumatic fastener driving tool |
August 4, 1992 |
| A pneumatic fastener driving tool includes a main valve operable to cause compressed air to be alternately introduced into and discharged from the upper piston chamber, a first passage leading the compressed air into the main valve chamber, a repeat valve disposed in the first passage fo |
| 5129868 |
Quick-return motion mechanism of automatic magnetic drilling machine |
July 14, 1992 |
| A quick-return motion mechanism for use in an automatic magnetic drilling machine including a feed motor for generating power transferred through a worm wheel and a high-ratio reduction gear to a handle shaft to drive an electric drill. A one-way clutch is provided inside the worm wheel |
| 5129467 |
Electric hammer drill having dust collecting device |
July 14, 1992 |
| An electric hammer drill including a vacuum dust collecting device for collecting dust from an area of an article being drilled by a drill bit wherein a hose extending from a body of the hammer drill is directly connected to an end of a movable first pipe which is slidably received in |
| 5121545 |
Electric circular saw with improved base tilting mechanism |
June 16, 1992 |
| An electric circular saw of the type including a mechanism for tilting a base relative to the plane of a blade is provided wherein a side knob for being gripped by the user during cutting operation pivotally connects the base and a body of the circular saw through a base attachment porti |
| 5120208 |
Molecular drag pump with rotors moving in same direction |
June 9, 1992 |
| A molecular drag pump for delivering a gas under molecular flow conditions comprises a pair of parallel, helically threaded rotors rotatably mounted in a stationary housing. The rotors have respective helical threads and respective helical grooves, and are held in close mesh with each ot |
| 5052500 |
Vibroisolating handle joint structure for power tool |
October 1, 1991 |
| A vibroisolating handle joint structure for a power tool such as a disc grinder has a vibratable power tool unit, a tubular handle holder fastened to the power tool unit and having first axial surfaces, a grip handle having on one end thereof a larger-diameter cup disposed radially aroun |
| 5049773 |
Stator assembly for motor |
September 17, 1991 |
| A stator assembly for use in an electric motor includes a stator core, a coil wound in the stator core and having terminal ends connected to leads, two sheets of insulation paper interposed between the stator core and the coil, and two auxiliary insulation plates extending between ends o |
| 5019023 |
Speed changer mechanism for electrically powered tool |
May 28, 1991 |
| An electrically powered tool such as a drill has a gear holder drivable by a motor shaft and having a larger-diameter gear and a smaller-diameter gear, a transmission shaft rotatable by the gear holder for rotating an output shaft, the transmission shaft having a splined disc having firs |
| 4938642 |
Portable electric router |
July 3, 1990 |
| A portable electric tool including an electric motor for driving a cutter to cut an object to be machined. The electric tool comprises a bracket for supporting the electric motor and handles attached to handle-mounting sections of the bracket for keeping the electric tool in cutting |
| 4889052 |
Paper feed control for a dot-line printer |
December 26, 1989 |
| A dot-line printer has a hammer bank carrying a plurality of printing hammers arranged in groups, each group having a predetermined number of printing hammers displaced from one another by predetermined numbers of dot-lines in the direction of paper feed. A shuttle mechanism causes the |
| 4877344 |
Impact printer temperature control device |
October 31, 1989 |
| In a control device for an impact printer for performing a printing operation at a first printing speed, a temperature sensing element, provided such that the temperature of an electromagnet unit can be directly or indirectly detected, is operated at a first temperature and restored |
| 4841137 |
Beam position control device |
June 20, 1989 |
| A beam deflector device in which two light beams from two light sources are simultaneously applied through movable reflectors to a beam deflector scanning a drum. The beams are also applied, through a beam splitter to two photodetectors used to control the position of the respective |
| 4831364 |
Drilling machine |
May 16, 1989 |
| A drive motor connected to a drill bit serves to actuate the drill bit. An electric current is allowed to flow through the drive motor to activate the drive motor. A mechanism serves to feed the drill bit with respect to a workpiece. The current flowing through the drive motor is sensed. |
| 4796561 |
Electrophotographic developing device having a shaped doctor board |
January 10, 1989 |
| In an electrophotographic developing device, its doctor blade disposed adjacent to a magnetic roll so as to control the thickness of a layer of magnetic developing agent conveyed by the magnetic roll has an edge which is curved in such a manner that the gap between the edge and the magne |
