Abstract: A boring tool is disclosed for machining holes in various materials which comprises a one piece body have a plurality of cutting members secured thereto in circumferentially spaced relationship. The cutting members are designed so as to enable them to be interchanged between a variety of different diameter bodies, the number of such cutting members increasing with greater diameter bodies. The body is provided with mounting surfaces positioned in such a manner so as to automatically accurately locate the cutting elements with respect to the body and to substantially eliminate any shear loading on the fastening elements securing the cutting members thereto thereby enabling use of only a single fastener element to secure each of the cutting members to the body. The cutting members are preferably circumferentially and radially spaced relative to each other so as to substantially balance the cutting loads thereby assuring positive accurate hole formation.

Abstract: A portable electric orbital jig saw of the adjustable orbit type incorporating an improved manually adjustable orbit drive mechanism which transmits smooth, continuous orbital motion to a reciprocating saw blade with no lost motion, from a full orbit mode operation to a zero orbit mode operation in which the saw blade reciprocates along a straight line. The present orbital drive mechanism includes levers operatively connected to one another in all operative positions thereof, but adjustable to vary the mechanical advantage thereof to thereby vary the degree of orbital motion of the saw blade.

Abstract: A portable, electrically energized, cordless grass trimmer device is disclosed having a rotatable hub which is adapted to alternatively mount, for substantially balanced rotation therewith, a flexible cutter strip and a line cutter and mechanical counterbalance.

Abstract: A storing and recharging base for a cordless electric vacuum cleaner of the type which includes an elongated housing having an electric motor and fan and rechargeable batteries therein. The base has a flat bottom and key slots so that it can rest on a horizontal flat surface or be hung on a wall. The base has an upper surface contoured generally complementary to the lower surface of the vacuum cleaner housing, and has a pocket at one end which receives a nose portion of the vacuum cleaner, and a spring at the other end which releasably engages in a recess in the vacuum cleaner so that the vacuum cleaner can be stored on a horizontal surface, e.g. on a counter top or shelf, or in a drawer, or can conveniently be hung on a wall. The base also has a plug which electrically engages a receptacle in the vacuum cleaner connected to the batteries. A line cord connects the plug to a charger plug which includes a transformer and a plug for insertion into an A.C.

Abstract: A hand-held cordless electric vacuum cleaner including separable power and bowl units secured by a releasable latch. The power unit includes a housing formed with a handle and enclosing an electric motor and fan, batteries for the motor, and a switch for turning the motor on and off. The bowl unit includes a hollow bowl provided with an air inlet opening and an integral internal nozzle communicated with the fan when joined to the power unit. A filter assembly including a ring and a filter bag is positioned wholly within the bowl between the air inlet opening and fan and is removable from the bowl after the units are separated, whereby dirt and debris contained in the bowl are not spilled during separation of the units. A flapper covers the nozzle when the unit is off to prevent dirt in the bowl from coming out of the opening.

Abstract: The invention is directed to a power driven tool for reciprocating a cutting element such as a saw-blade or the like and includes a motor housing and a drive motor mounted in the motor housing. A gear case is connected to the motor housing and the shaft arrangement is mounted in the gear case. The shaft arrangement includes a shaft slideably mounted in the gear case for reciprocating movement. The shaft is adapted to receive the cutting element thereon. A U-shaped channel yoke is mounted to the drive shaft in such a manner that the walls of the drive shaft laterally support the U-shaped channel yoke at the base of the yoke. An eccentric drive connects the U-shaped channel yoke with the drive motor for reciprocating the shaft arrangement.A method of assembling the shaft arrangement includes the step of cutting two slots in the base of the channel yoke to define three bridges one adjacent the other bridging the gap between the leg walls of the yoke.

Abstract: The invention is directed to an abrasive sheet for cutting a workpiece and is adapted for use with a sanding tool having a base plate with a plurality of apertures formed therein and equipped with a suction arrangement for establishing a partial vacuum at each of the apertures. The abrasive sheet includes a base sheet having a plurality of apertures formed therein and located thereon to register with the apertures of the base plate. An abrasive material is secured to the base sheet for defining a plurality of channels thereon which extend outwardly from each one of the apertures of the base sheet.

Abstract: A rotary lawnmower includes a dish-like body defining the chassis of the lawnmower. The dish-like body has an upwardly extending side wall and a substantially continuous bottom wall. A set of wheels are mounted on this dish-like body. A motor is mounted in the body so as to cause the free end of the motor drive shaft to penetrate the bottom wall. The free end of the motor drive shaft is adapted for carrying a cutting blade thereon. A cover interfaces with the dish-like body to conjointly define therewith a housing enclosing the motor.

Abstract: The invention is directed to a brush system for an electric motor device having a motor housing made either of electrically conductive or electrically insulating material. The brush system for an electric motor mounted in the housing made of electrically insulating material includes a conductive sleeve mounted in the housing so as to cause a portion of the sleeve to protrude beyond the housing. A carbon brush is provided for contacting the commutator of the electric motor. This carbon brush is slideably disposed in and is electrically connected to the sleeve. A spring resiliently biases the carbon brush to extend beyond the sleeve and to resiliently hold the carbon brush against the commutator. A terminal holds an electric lead of the motor. This terminal includes an uninterrupted annular portion which is press-fitted onto and completely surrounds the protruding portion of the sleeve.

Abstract: A workpiece supporting and clamping arrangement includes supporting structure defining a supporting surface. A first top member having an upper surface is supported by the supporting structure on the supporting surface. A second top member likewise has an upper surface and both upper surfaces lie in a substantially horizontal plane. The top members also have respective mutually adjacent side walls defining clamping surfaces. A guiding structure is provided for guiding the second top member relative to the supporting structure. The second top member can be moved along the guiding structure so as to adjust the position of the second top member with respect to the first top member.

Abstract: The invention is directed to a circuit arrangement and a suppressor-insulator member for suppressing noise in a portable hand-held electric-powered tool such as a double-insulated tool or the like while at the same time providing electrical insulation between voltage-carrying portion within the tool and an exposed part of the tool accessible to the operator of the tool. The suppressor-insulator member for conducting high-frequency noise from the voltage-carrying portion within the tool to the exposed metal part includes two connecting plates connectable to the voltage-carrying portion and the exposed-metal part respectively; and, a plate-like element of insulating material sandwiched between the connecting plates.

Abstract: The invention is directed to a chuck for grasping a tool such as a drill bit or the like and adapted to be tightened with the aid of a chuck key. The chuck includes a hollow body defining a longitudinal axis and having a front end for receiving the tool therein. A plurality of elongated jaws are movably mounted in the hollow body. A sleeve is rotatably mounted on the body and threadably engages the jaws to move the jaws in the body to clamp and release the tool whereby substantial radial forces are transmitted to the body by the jaws when the jaws are tightened on the tool. The sleeve extends in the direction of the longitudinal axis of the hollow body to surround the hollow body at the region of the jaws for supporting the body against the radial forces. A gear is provided for coacting with the chuck key to actuate the sleeve to move the jaws for tightening the jaws on the tool.

Abstract: A power-driven drill and screwdriver includes a housing and a drive motor mounted in the housing. A case is attached to the housing and has a spindle bearing mounted therein. A first clutch is rotatably mounted in the case axially of the bearing and is operatively connected to the drive motor. An output spindle is journalled in the bearing and has a flange formed thereon. A second clutch is formed on the flange so as to be adjacent the first clutch. The output spindle is slideably mounted in the bearing so as to cause the second clutch to be movable relative to the first clutch between a first location whereat the second clutch firmly engages the first clutch and a second location whereat second clutch is disengaged from the first clutch. A spring resiliently biases the second clutch into the second location. An eccentric member is journalled in the case and is rotatable from one position corresponding to the screwdriving mode of the tool to another position corresponding to the drill mode of the tool.

Abstract: A combination power tool has a housing defining a bore with an annular bearing member mounted in the bore. A first clutch is rotatably mounted in the housing and a second clutch is rotatably mounted in the annular bearing member and movable relative to said first clutch between a first position whereat the second clutch firmly engages the first clutch and a second position whereat the second clutch is disengaged from the first clutch. A spring biases the second clutch into its second position. The annular bearing member is movably mounted in the bore for engaging the second clutch member to counteract the urging force of the spring and to displace the second clutch from the second position into the first position. A face cam formed on the annular bearing member and a cam follower is located on the housing for coacting with the face cam to guide the annular bearing member when the same is moved along the bore to bring the second clutch into its first position.

Abstract: The invention is directed to an override arrangement and handle for a shifting mechanism in portable tools. The portable tool includes a housing and a drive motor mounted in the housing. A case extends from the housing and a transmission is operatively connected to the motor and mounted in the case. A shifting mechanism engages the transmission for adjusting the same between at least two modes of operation. The shifting mechanism includes a shaft penetrating the case and rotatable between two positions corresponding to respective ones of the modes of operation. The improvement includes a handle attached to the shaft that is contoured so as to abut against the case when the handle is rotated past one of the two positions thereby preventing the operator of the tool from overriding the one position.

Abstract: The invention is directed to a foldable, portable workbench having a work table and a support structure for supporting the work table. The support structure includes a pair of mutually spaced leg assemblies and each of these leg assemblies, in turn, includes a pair of legs pivotally connected at one end thereof to the work table. Articulated linkages pivotally interconnect, respectively, the two legs of each pair of legs to each other and at least one of the legs to the work table. The articulating linkages are connected so that the work table and leg structures are stacked in juxtaposition to each other when the workbench is in its folded position and, so that the other ends of the leg structures are spread apart from each other with the work table substantially transverse to the leg structures when the workbench is in the erected position.