Abstract: A small electric appliance with a drive mechanism for generating an oscillatory motion of at least one working unit of the small electric appliance. The drive mechanism has a first drive component, a second drive component and a coil for producing a magnetic field that extends from the first drive component and acts on the second drive component that is movably arranged in the small electric appliance, in such a way that the second drive component is set in an oscillatory motion. The first drive component is movably arranged in the small electric appliance in order to execute an oscillatory motion in phase opposition to the second drive component. The mass centers of gravity of the first drive component and the second drive component, including parts co-moving with the first drive component or the second drive component, move on a common straight line.

Abstract: A hand-held power tool having a housing and an open top tray attached thereto is disclosed. The open top tray is oriented generally perpendicular to a handle axis for carrying small magnetic objects therein. Additionally, the tray is provided with a magnetic portion for retaining the small magnetic objects when the handle is inclined from a vertical position. Thus, the present invention allows small magnetic objects such as tool bits, drill bits, and fasteners to be carried on the hand-held power tool for quick and easy access by an operator.

Abstract: An electrical connector assembly for a power tool, a power tool and methods for assembling a power tool. A one-piece trace or spider terminal member assembly provides points of connection for the motor components, such as the field windings, the brushes and the switch. To assemble the motor, the terminal member assembly is positioned in the motor housing. To mount the terminal member assembly, the terminal member assembly is preferably co-molded with the housing or, alternatively, may snap-fit into connectors formed on the housing. The terminal member assembly and the housing are then preferably punched or stamped at points to provide the necessary number of electrically separated contact elements to connect the components of the motor. For example, the female ends or terminals of the field windings, the brushes and the switch are connected to the electrically separated contact elements to provide a suitable complete electrical circuit for the motor.

Abstract: In an inexpensive electric tool, a thin insulating layer is provided by pouring an insulating resin material by the injection molding to extend from a rotor supporting portion 1a formed in an outer casing to an inner surface or inner and outer surfaces of the outer casing. Also, as another configuration and method, an insulating piece 12a for covering the inner surface of the rotor supporting portion is provided, and also an insulating block for covering the rotor supporting portion and supporting ribs is provided.

Abstract: An electrical hand held tool for producing at least a percussion movement of a working tool includes an electrical drive, a first, oscillating subassembly including a percussion mechanism (2) and a rotor (5) of the electrical drive for transmitting torque to the percussion mechanism and rotatable about a rotor axis (B) extending parallel to an oscillation path (I) of the first subassembly, and a second subassembly including a housing (6) in which the first subassembly is supported for a limited oscillating movement along a tool axis (A).

Abstract: The holdable multi-functional rotary device comprises a casing suitable to be held by users. The interior thereof is formed with a receiving space for arranging a driving unit and a battery. The driving unit has a motor and a driving shaft extending out of the casing. The power of the motor and driving shaft is transferred by speed change gear set. By changing speed change gear set, the rotary speed of the driving shaft is changeable. A plurality of rotary pieces are arranged around the driving shaft. The rotary pieces are capable to achieving predetermined effects with the rotation of the driving shaft. Thereby, the whole rotary device can be combined with rotary pieces and the rotary speed of the rotary pieces are adjustable. The rotary pieces can be attached to a fan, a massage device, a dust absorbing mask, a shoe brush, a golf rod brush, etc.

Abstract: A hand power tool has a housing provided with air inlet and/or air outlet openings, the openings are arranged in various regions of the housing and have different directions, and a cover is movably supported on the housing so as to close a part of the openings.

Abstract: A power tool has a mechanism for ejecting a battery pack which includes a receiving frame which defines a cavity to receive a battery pack. A receiving member is adjacent the cavity. The receiving member meshes with a member on the battery pack to hold the battery pack in the cavity. A biasing member is in the cavity adjacent the receiving member. The biasing member ejects the battery pack from the ejecting mechanism. A member retains the biasing member in the cavity. The member guides a portion of the battery pack meshing with the receiving member into contact with the biasing member such that when the battery pack is locked onto the frame, the biasing member is in a compressed condition and when the battery pack is an unlocked position, the biasing member ejects the battery pack from the frame.

Abstract: A rotary power tool having a light source includes a housing, an electric motor provided in the housing and an elongated spindle engaged with and adapted to be rotatably driven by the motor. A rotatable holding assembly is attached to an end of the spindle and extends from a front end of the housing for holding a tool accessory. At least one magnet is adapted to be rotated by the spindle for producing a magnetic field, and a generally tubular sleeve is attached to the front end of the housing. At least one light emitting diode projects from a front end of the sleeve, generally between the inner and the outer surfaces of the sleeve. An inductive coil is also imbedded at least partially in the sleeve generally between the inner and the outer surfaces, proximate the magnet for generating an electric current from the magnetic field. Electrical conductors are also embedded and routed through the sleeve for supplying the electric current from the inductive coil to the light emitting diode.

Abstract: A motor end cap and output device housing is provided that includes a motor end plate having an output device attachment area and a output device housing having a motor end plate attachment area. The output device attachment area includes a locking tab that mates with a slot portion in the output device housing to interlock the two together. As a result, the motor end plate can be conveniently attached to the output device housing without requiring extra fasteners.

Abstract: A hand-operated miniature power generator comprises a housing in which a driving member, a power generating member and an electronic circuit board are disposed. The driving member is manually operated to drive the power generating member to generate electric current, which may be taken for in-house consumption or external consumption by inserting a plug into an outlet of the electronic circuit board.

Abstract: An electric motor system and method are shown having a circuit board arranged in a plane that lies in a predetermined angle relative to an axis to an armature of the electric motor. In one embodiment the predetermined angle is an acute angle and the plane is not perpendicular to an axis of an armature of the motor 10. Brushes are located remotely from the board.

Abstract: A rotary power tool having a light source includes a housing, an electric motor provided in the housing and an elongated spindle engaged with and adapted to be rotatably driven by the motor. A rotatable holding assembly is attached to an end of the spindle and extends from a front end of the housing for holding a tool accessory. At least one magnet is adapted to be rotated by the spindle for producing a magnetic field, and a generally tubular sleeve is attached to the front end of the housing. At least one light emitting diode projects from a front end of the sleeve, generally between the inner and the outer surfaces of the sleeve. An inductive coil is also imbedded at least partially in the sleeve generally between the inner and the outer surfaces, proximate the magnet for generating an electric current from the magnetic field. Electrical conductors are also embedded and routed through the sleeve for supplying the electric current from the inductive coil to the light emitting diode.

Abstract: A power tool has a motor with end caps secured by cold forming to the motor. The end caps include bearings retained in the end cap by deformation of the end cap. The motor includes an armature shaft which is staked to retain laminates as well as a retainer on the shaft. Also, a pinion gear with a shoulder which limits movement of the shaft in the motor. A fan is on the motor armature which is secured by an adhesive which changes color during assembly. The motor also includes a demagnetization member which increases resistance to demagnetization due to elevated temperature, as well as armature reaction field.

Abstract: A hand-held power tool, such as a spiral cutting tool, with improved operator control and visibility. The power tool includes a motor contained in a motor housing. The motor may be a variable speed motor controlled by a speed control user interface mounted on the housing. Each time a speed control button is actuated, the motor speed is changed. A display provides the operator of the tool with an indication of the motor speed selected. A detachable handle is provided with a moveable mechanism for easily, quickly, and securely attaching the handle to the housing and removing the handle therefrom with one hand. The detachable handle may include one or more storage compartments formed therein. The detachable handle includes a trigger switch mounted therein for operating the cutting tool motor. The trigger switch is mounted in the detachable handle in a position such that the switch is operated by the little finger and ring finger of an operator's hand.

Abstract: An electrical connector assembly for a power tool, a power tool and methods for assembling a power tool. A one-piece trace or spider terminal member assembly provides points of connection for the motor components, such as the field windings, the brushes and the switch. To assemble the motor, the terminal member assembly is positioned in the motor housing. To mount the terminal member assembly, the terminal member assembly is preferably co-molded with the housing or, alternatively, may snap-fit into connectors formed on the housing. The terminal member assembly and the housing are then preferably punched or stamped at points to provide the necessary number of electrically separated contact elements to connect the components of the motor. For example, the female ends or terminals of the field windings, the brushes and the switch are connected to the electrically separated contact elements to provide a suitable complete electrical circuit for the motor.

Abstract: A motor is incorporated in a cylindrical body which is a rotary brush. Rotation of a rotor of the motor, directly or via a speed reduction mechanism, drives the rotary brush. Cooling air runs through the cylindrical body so that the motor is cooled and protected. The rotary brush and an electric apparatus using the rotary brush can be downsized and easily.

Abstract: A battery-powered hand-guided power tool is provided, such as a hammer, includes a tool housing 3 that contains an electric motor M, a grip housing 2 and a rail-and-channel structure 36, 37, 54, 55 for releasable mounting of a rechargeable battery pack 50. The battery pack 50 is locked in an operative position on the housing 3 in which electrical contacts (51) of the battery pack 50 and associated electrical contacts 42 of the tool housing are electrically connected along a contact length extending in a longitudinal direction of the rail-and-channel arrangement. A latch structure 18,19 located on the tool housing 3 is movable between a latched position and a release position. When the latch structure 18,19 is moved from the latched position into the release position, the battery pack 50 can be moved in the direction of the longitudinal extent of the rail-and-channel structure 36, 37, 54, 55 out of the operative position and can be removed from the tool housing 3.

Abstract: A motor is incorporated in a cylindrical body which is a rotary brush. Rotation of a rotor of the motor, directly or via a speed reduction mechanism, drives the rotary brush. Cooling air runs through the cylindrical body so that the motor is cooled and protected. The rotary brush and an electric apparatus using the rotary brush can be downsized and easily.

Abstract: A palm top manual operated generator includes a housing, a power generating unit, a driving set, a handle and a spring. The housing has a cambered rack which penetrates into the housing and is engaged with the first speed change gear of the driving set. After changing speed by a plurality of speed change gears of the driving set, power is unidirectionally transferred to a gear of the power generating unit through a unidirectional speed change gear. A plurality of magnets are circularly arranged within the rotary casing. When the handle is held and pressed continuously, the cambered rack drives the driving set. Then rotary speed is increased to drive the rotary casing of the power generating unit to rotate with a high speed. Thereby, electric power is generated due to magnetic excitation, the electric power is outputted from a receptacle through a regulating circuit and a power storage circuit.

Abstract: A battery-powered drill including a housing (2) with a handle (3), an electrical drive motor (19) located in the housing (2) a battery unit (11) insertable into the housing (2) and fixedly securable therein for supplying electrical power to the electrical drive motor, a connection device for connecting the battery unit (11) with the electrical drive motor (19) and including a connector element (10) projecting from the battery unit (11) and a mating connector element (9) provided in the housing (2) and electrically connectable with the connector element (10) provided on the battery unit (11), and a press pin element for supporting the battery unit on the housing (2) and displaceable against a spring-biasing force upon the mounting of the battery unit (11) on the housing (2) for securing the battery unit (11) on the housing (2).

Abstract: An electrical appliance which operates at multiple speeds includes a motor construction having a stator and a rotor which rotates within the stator. The stator includes a plurality of magnetic flux inducing wires coiled on different poles of the stator. The stator and the rotor are contained within a motor housing with the appliance further including a switch housing mounted directly to the motor housing. The flux inducing wires have wire ends which extend out of the motor housing and into the switch housing which includes receptors to receive the ends of the flux inducing wires and which also receive electrical contact members which secure and electrically connect with the ends of the flux inducing wires within the receptors of the switch housing.

Abstract: A battery powered, hand guided power tool, such as a hammer, includes a tool housing 3 that contains an electric motor M, a grip portion 2 and a rail-and-channel structure 36,37,54,55 for releasable mounting of a rechargeable battery pack 50. A locking device is provided on the tool housing 3 and includes a latch element 18,19 which is movable into a latch recess 52,53 formed in a housing of the battery pack 50, whereby the battery pack is locked in an operative position on the tool housing, movable by a user, against the force of a spring 20,21. The latch element 18,19 can be pivoted by a user to extract the latch element from the latch recess 52,53 for the release of the battery pack 50 from assembly with the tool housing 3. On the tool housing 3 adjacent to the rail-and-channel structure 36,37,54,55, there is provided a frame part 15 that includes at least one frame-part recess 16,17.

Abstract: A motor is incorporated in a cylindrical body which is a rotary brush. Rotation of a rotor of the motor, directly or via a speed reduction mechanism, drives the rotary brush. Cooling air runs through the cylindrical body so that the motor is cooled and protected. The rotary brush and an electric apparatus using the rotary brush can be downsized and easily.

Abstract: A new series of portable electric tools using high frequency three-phase induction motors with built-in power electronic converter. The tools operate from a single phase AC mains and a built-in power electronic circuitry converts the input supply to a three-phase, higher frequency (200-400 Hz) supply, which is used to drive a three-phase induction motor connected to the gearbox. A microprocessor-based controller, with a novel algorithm, generates three-phase, sinusoidal output waveforms and also provides the soft-start feature for the inverter and the motor. The entire electronics is packaged in a novel way within the housing of the tool itself. The output shaft of the motor, either directly or through a gearbox, can be connected to a wide range of tools like Drills, Grinders, Nut Runners, Screw Drivers, Impact Wrenches, Shears, Nibblers, Saws, Sanders, polishers, etc.

Abstract: An arrangement of frictional gripping zones on the handle of a power tool is disclosed. The power tool has a main body portion and a handle portion depending from the main body portion. The handle portion includes a first side region, a second side region opposite the first side region, a rear region connecting the first and second side regions along a rear of the handle portion, and a front region connecting the first and second side regions along a front of the handle portion. A plurality of alternating first and second gripping zones extend longitudinally along each of the first and second side regions of the handle portion. The first gripping zones are made the first gripping zones being made from a first material and the second gripping zones are made from a second material different from the first material. Preferably, the material of the second gripping zones have a hardness greater than the material of the first gripping zones.

Abstract: 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 2 such that each of the strips has a tapering, V-shaped cross-section and has elasticity in the widthwise direction of the brush holder 2. A pair of brush holder mounts 14 are provided on a motor housing of the electric power too, on which the brush assemblies 1 are installed. Each brush holder mount 14 includes a pair of positioning slots 16 for receiving the elastic strips 7 of the brush holder 2. When fitted in the positioning slots 16, the elastic strips 7 securely engage the side walls of the slots so as to prevent unintended removal of the brush holders 2 from the brush holder mounts 14.

Abstract: A linear actuator includes a hollow housing that is formed from a first portion and a second portion. The first portion of the housing is formed to support all of the components of the linear actuator therein, while the second portion of the housing functions to retain such components in the first portion of the housing. An end cap is secured to the end of the elongated tube portion to close the housing. The linear actuator includes a motor that operates through a clutch assembly to selectively rotate a screw. The clutch assembly limits the amount of torque that can be transmitted from the motor to the screw assembly. A nut is mounted on the screw assembly for linear movement in response to rotation of the screw assembly. An extension tube is crimped onto the nut for effecting linear movement of a workpiece. The structure of the nut is designed to facilitate an improved crimping connection between the nut and the extension tube.

Abstract: A high efficiency motor for low velocity and high volume fans and other applications includes an armature, a stator and a motor shaft. The armature is made from plates that collectively have a stack height that give the armature a thickness. The plates are keyed with a keyway and the motor shaft has a key to increase alignment accuracy and armature assembly efficiency. An armature aspect ratio is determined by the armature diameter divided by the armature thickness. Similarly a stator aspect ratio is determined by a stator diameter divided by a stator thickness. The armature and the stator aspect ratios are selected to increase torque output and lower rotational speed of the motor for various power output levels. Magnetic permeability properties of the armature and stator is selected to increase operating efficiency of the motor and decrease motor size.

Abstract: A motor cover arrangement for covering a cooling fan of a motor enclosed in a motor case, wherein the motor cover arrangement includes a cooling fan cover and an air intake hood. The cooling fan cover has an open outlet end mounted on the motor case and an inlet end extended from the motor case to define a fan cavity to dispose the cooling fan therein and an air inlet opening in front of the cooling fan. The outlet end of the cooling fan cover defines an air discharge slot between the outlet end and the motor case to communicate with the air inlet opening. The air intake hood includes a base shell integrally covering the air inlet opening of the cooling fan cover and an air intake shell extended from the base shell to a side portion of the cooling fan cover to provide an air intake window so as to form an air intake passage between the air intake window positioned at the side portion of the cooling fan cover and the air inlet opening of the cooling fan cover.

Abstract: A portable power tool provides operating torque for a rotary load. The portable power tool includes an offset rotary sleeve for coupling attachment to the power input shaft of the rotary load. A gearing assembly provides right angle torque transfer from an in-line D.C. motor. The gearing assembly is driven by an output power shaft which is powered by a DC electrical motor. The rotary sleeve coupling is supported on opposite ends by a first bearing on an upper portion of the rotary sleeve coupling and by a second bearing on a lower portion of the rotary sleeve coupling. The D.C. motor is powered by a rechargeable battery.

Abstract: A high efficiency motor for low velocity and high volume fans and other applications includes an armature, a stator and a motor shaft. The armature is made from plates that collectively have a stack height that give the armature a thickness. The plates are keyed with a keyway and the motor shaft has a key to increase alignment accuracy and armature assembly efficiency. An armature aspect ratio is determined by the armature diameter divided by the armature thickness. Similarly a stator aspect ratio is determined by a stator diameter divided by a stator thickness. The armature and the stator aspect ratios are selected to increase torque output and lower rotational speed of the motor for various power output levels. Magnetic permeability properties of the armature and stator is selected to increase operating efficiency of the motor and decrease motor size.

Abstract: A motor for providing reciprocating motion comprises a stator defining an arcuate pole face and a flat pole face and an armature defining a complimentary arcuate pole face and flat pole face, where the armature rotates about a pivot point in order to maintain a fixed air gap between the arcuate pole faces of the stator and the armature and a variable air gap between the flat pole faces of the stator and the armature.

Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.

Abstract: An oral hygiene device comprises a rotating body 22 mounted to a rotating shaft 21 of an electric motor 14, an output shaft 11 resiliently supported via a resonance pin 25 to be swingable finely, a drive magnetic body 23 provided on the rotating body 22, and a driven magnetic body 31 provided on the output shaft 11 to face the drive magnetic body 23 so as to be out of contact therewith. The drive magnetic body 23 and the driven magnetic body 31 are composed of permanent magnets, and as the rotating body 22 revolves, a varying magnetic field is generated between the both magnetic bodies 23, 31 to cause vibration of the output shaft 11 at high speed. In this manner, there are provided a vibration generating device, which can be manufactured at low cost and efficiently transmits vibration, and an oral hygiene device using the same.

Abstract: An internal vibrator for compacting concrete and having a vibrator housing in which is disposed an eccentric mass and an electric motor for driving the eccentric mass. The electric motor is supplied via a power supply cord with electric current having a frequency that is greater than line frequency. The vibrator comprises a switch for controlling the electric motor, and also includes a transformer for supplying to the electric motor the electric current having the frequency that is greater than line frequency. The switch and the transformer are combined in a common housing to form a miniaturized built-in unit on the power supply cord.

Abstract: A motor cooling and sound absorbing system includes a housing (10) forming a chamber (13) around a motor (11). The shaft (12) of the motor (11) carries a fan (40) positioned in a chamber (38) formed by a recess (36) cut in a foam block (35). The fan (40) draws air into the chamber (13) through inlet apertures (33) in the housing (10) and this air is directed past the motor (11) to cool it. The air exits the fan (40) generally radially against an angled surface (37) of the recess (36) of the foam block (35). The air is then received in a diffuser passageway (41) defined by the angled surface (37) and an angled surface (42) of a choke plate (19) positioned above the foam block (35). The diffuser passageway (41) reduces the velocity of the air to assist the foam block (35) in absorbing the noise generated thereby, while at the same time reducing the pressure at the exit of the fan (40) to increase the cooling air flow past the motor (11).

Abstract: A power tool is provided and includes a tool housing having interior and exterior surfaces and inlet and outlet air vents and a motor disposed in the tool housing and having a motor housing with an external surface and inlet air ports for the passage of cooling air into the motor and outlet air ports for passage of warmed exhaust air from the motor. The inlet and outlet air ports open at the external surface and the outlet air ports are spaced from the inlet air ports. The tool also includes an air deflector resiliently coupled to the external surface. The air deflector includes wall structures bracketing the outlet air ports. The structures have portions extending to and contacting the interior surface of the tool housing and bracketing the outlet air vents to form a barrier around the outlet air ports and vents to channel exhaust air to the outlet vents and substantially inhibit exhaust air from the outlet air ports from entering the inlet air ports or other portions of the tool.

Abstract: A surgical power tool is disclosed including a power console and a handheld motor unit. The power console provides controlled power and to the handheld motor unit. Pressure sensitive switching elements on the handheld unit provide signals to the power console which are transformed into operating power to the motor unit including variable speed, speed range, forward/reverse, and safety. The handheld motor unit includes a chuck or tool receptacle and a Hall effect or other radiation field detector which response to the presence of a magnet or other radiation device as a part of the surgical tool, to identify the tool installed and provide a control signal to the motor, e.g., speed range limitation. The handheld motor unit housing is sealed and autoclavable.

Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.

Abstract: A generator and lighting assembly is provided for use on a mechanism, e.g. a power driven tool, having a shaft that is rotated during use. The assembly includes a rotor assembly 122 including a rotor shaft 102 affixed to the mechanism shaft, and a permanent magnet 132 supported on the rotor shaft for rotation therewith. A stator assembly 124 is also provided, and includes a body presenting pair of electrically conductive arms 138 extending on opposite sides of the rotor and an electrically conductive shank 140 connecting the arms together, and a winding 136 of electrically conductive wire supported on the body and presenting a pair of opposed ends. The assembly includes a lamp assembly 128 for providing illumination to an area to be lighted, and includes a light emitting diode (LED) embedded in a solid transparent bulb formed of a synthetic resin composition.

Abstract: A power tool has a mechanism to reverse a motor. The mechanism includes a first member secured with the motor surrounding the motor commutator. A pair of electrical contacts are supported in the first member. A second member is rotatable on the fist member. The second member carries a pair of brush holders which include electrical contacts. As the second member is rotated in the first member, the electrical contacts of the brush holders, as well as the electrical contacts in the first member, electrically couple with one another from a first position to a second position which relates to a forward and reverse direction of the motor. A lever moves the second member between its first and second positions.

Abstract: A hand machine tool has a battery operated drive motor accommodated in a machine housing, with a battery housing mountable on said machine housing. The mounting of the battery housing of the machine housing is performed by two guiding strips arranged on the machine housing and engaging in guiding grooves provided in the battery housing. In a locking position, the battery housing is held by a spring-loaded slider which has two legs provided with end arresting projections form-lockingly engaged with stationary arresting projection provided on the battery housing, for locking the battery housing on the machine housing.

Abstract: A medical instrument, such as a surgical drill, includes a battery-powered handpiece and a booster. The handpiece includes an electrical device, such as a motor, having an operating characteristic responsive to changes in DC voltage and a battery that applies a first DC voltage to the electrical device. The booster is disposed externally of the handpiece body and includes a DC power source and a cable for connecting the DC power source with the battery in the handpiece to apply a second DC voltage to the electrical device. The operating characteristic of the electrical device, e.g., speed, is modified by selectively coupling or decoupling the booster from the handpiece.

Abstract: A miniature electric generator and lighting apparatus is provided for use in a power-driven tool. The apparatus includes a rotor assembly 22 having a permanent magnet, and a stator assembly 24 within which the shaft and magnet are received. The stator assembly 24 includes a pair of electrically conductive arms 38 extending on opposite sides of the rotor, an electrically conductive shank 40 connecting the arms together, and a winding 36 of electrically conductive wire presenting a pair of opposed ends. A lamp 54 is connected to the ends of the winding by a circuit 52 so that it is powered upon rotation of the shaft. A housing assembly 30 supports the stator assembly 24 on the output shaft of the tool, and is secured to the tool. The housing assembly 30 and cooperating structure 42 position the stator assembly 24 relative to the magnet 32 to prevent contact between the stator element 34 and the magnet during rotation of the output shaft 14.

Abstract: An electric motor drive unit for surgical tools, in which a drive consisting of a motor or motor gear unit is connected to, and electrically insulated from a clutch for the tool by a shaft, and in which the drive as well as current-carrying components are electrically insulated from a housing which accomodates said drive and current-carrying components. To achieve an electrical isolation of the current-carrying components from the tool and the gripping surface of the housing, the shaft, at least over part of its length, is made from an insulating material and runs through a seal which is supported in the housing and sealingly divides the housing into a first and second chamber, of which the first chamber accomodates the drive and the second chamber accomodates the clutch for the tool, said tool being inserted into a distal opening in the housing in the second chamber and connectable to the clutch.

Abstract: In a preferred embodiment, a suction punch forceps, including: a body; a hollow tube attached to the body at the proximal end of the hollow tube and extending therefrom; a shaft disposed within the hollow tube for axial back-and-forth movement therein; a punch member rotatably attached to the distal end of the hollow tube and attached to the shaft such that each back-and-forth movement cycle of the shaft will cause the punch to make a cutting motion to cut tissue which is in contact with the punch member; and an electric motor attached to drive the shaft in the back-and-forth movement,

Abstract: An electrical driving device has three permanent-magnet-excited rotors 3 whose shafts 3S extend through intersections S between a circle 4 and 120.degree. spaced-apart radii 5 which diverge from the centre M of the circle. Each of the cylindrical rotors 3 is associated with three stator poles 7.1, 7.2, 7.3, which are spaced from the cylinder circumference by air gaps 6. Three of these stator poles 7.1 which are situated within the circle 4 are connected by means of yoke irons J.sub.1. The stator poles 7.2 and 7.3 situated outside the circle 4 are connected in pairs via yoke bridges J.sub.2. These yoke bridges J.sub.2 are, in their turn, connected to yoke irons J.sub.3, which carry excitation coils 10. At their ends which are remote from the yoke bridges J.sub.2 all the yoke irons J.sub.3 are magnetically connected via a return yoke J.sub.4. The yoke iron J.sub.1, the stator poles 7.1, 7.2 and 7.3, the Yoke bridges J.sub.2 interconnecting them, the yoke iron J.sub.3 and the return yoke J.sub.

Abstract: An electric driven power tool motor is provided with a conical air inducer for improving the motor air cooling supply from a motor driven impeller.

Abstract: A hand power tool has a housing composed of at least two parts, and a plurality of connecting elements which connect the housing parts with one another at a plurality of mounting points. The housing parts are provided with a pair of tubular domes arranged at each of the mounting points and having associated passages which are arranged coaxially with one another and are formed as throughgoing passages at both sides. The connecting elements are formed by pins each extending through the passages of each of the pairs of the domes.