Abstract: A working depth adjusting device includes an adjusting member; an intermediate member and an operation member. The adjusting member is supported on the front portion of the tool body and movable along the axis of the spindle, so that the position of the adjusting member can be adjusted relative to the tool bit with respect to a working depth direction. The intermediate member is rotatably supported on the adjusting member. The adjusting member moves in the working depth direction as the inmate member rotates. The operation member is operable to rotate relative to the intermediate member between a lock position and an unlock position. The intermediate member has a first engaging member. When the operation member is rotated to the lock position, the first engaging member engages the tool body, and the engagement of the first engaging member is maintained by the operation member, so that the working depth adjusting device can be prevented from being removed from the tool body.

Abstract: Screw guide is provided and includes a cylindrical member having a first end adapted to rotate a fastener and a second end adapted to receive torque from an external source and transfer the torque to the fastener, a stop ring engaged with the cylindrical member that is adjustable to control the movement of the fastener with respect to the screw guide. The screw guide may also include a sleeve that surrounds the cylindrical member and the stop ring and a stand off ring that is engaged with the cylindrical member.

Abstract: A depth stop device (14) for use with a hand-held screw driving tool (2) includes an axial element (32) for driving a screw bit (34) and a sleeve element (20) having a longitudinal bore (30) in which the axial element (32) is at least partially received and an exit opening (36) extending sidewise from the longitudinal bore (30). The exit opening (36) is limited by a deflection surface (40) which is stretched over an intersection plane (SE) and has a geometrical center (M) that forms an origin of a spatial system of coordinates. The intersection plane (SE) forms with a tangential axis (T) of the spatial coordinate system that extends perpendicular to both the longitudinal (L) and radial (R) axis of the coordinate system, an acute angle (?).

Abstract: An axial-force-detective fastening tool fastens a nut to a bolt, and at the same time, detects and axial force acting on the bolt. The tool has a socket body rotatably supported with a tool body and having a nut receiver. The socket body turns a nut received in the nut receiver around an axis of the socket body, to fasten the nut to a bolt. An ultrasonic sensor is supported with the tool body, is movable along an axis of the socket body, and is brought into contact with a front end of the bolt in the nut receiver. The ultrasonic sensor emits and receives ultrasonic waves to detect an axial force acting on the bolt. A sensor spring pushes the ultrasonic sensor to the front end of the bolt. The bolt includes a reference surface which is engaged by the ultrasonic sensor and is recessed in a tapered opening in an end of the bolt.

Abstract: In accordance with one embodiment of the present invention, a driver may include an electric motor coupled to a bit interface. The bit interface may include a generally cylindrical body having first and second hollow portions. The first hollow portion may be on one end of the generally cylindrical body and may define a generally cylindrical hole. The second hollow portion may abut the first hollow portion and define an oblong channel. The oblong channel may be further defined by first and second parallel flat walls. The cylindrical body may also include a first transverse groove.

Abstract: A hand-held power screwdriver includes a low-noise torque clutch (5) for transmitting torque to a tool spindle (4) and formed of claw clutch (6) and ratchet clutch (7), with the ratchet clutch (7) having a rotatably driven first ratchet member (7a) and a second ratchet member (7b) both having, respectively, oppositely oriented, circumferentially arranged, oblique cams (9), with the claw clutch (6) having a first claw member (6a) and a second claw member (6b) having oppositely oriented claws (11), respectively, the first claw member (6a) of the claw clutch (6) being fixedly connected with the second ratchet member (7b) of the ratchet clutch (7) for joint rotation therewith, and with the screwdriver further including at least one engagement member (12) for connecting the second claw member (6b) with the tool spindle (4) for joint rotation therewith and for disconnecting the claw member (6b) from the tool spindle (4) and a retaining element for connecting the second claw member (6b) of the claw clutch (6) with t

Abstract: An electrically powered, hand-held screw driver (2) has a housing (4), a depth stop (6) arranged on this housing (4), a drive motor (20), an axially displaceable tool spindle (8) operatively coupled with a tool holder (11), and a torque coupling (16) arranged between the drive motor (20) and tool spindle (8) and which has a motor-side coupling part (22) and a tool-side coupling part (24) connected to the tool spindle (8) so as to be fixed with respect to rotation relative to it. The two coupling parts (22, 24) can be made to engage with one another and the tool spindle (8) is biased away from the motor-side coupling part (22) by means of a coupling spring (34). The tool-side coupling part (24) has axial movement play (a) relative to the tool spindle (8) and is mechanically coupled with a movement transmitter that is separate from the coupling spring (34).

Abstract: A hydraulic threaded bolt tightening device (1) for tightening and loosening large bolted connections, comprising a cylinder supported on a machine part to be clamped by means of a threaded bolt and a nut (2), at least one piston which is guided thereon in a sealed manner, with a threaded bush screwed on to one end of the threaded bolt and which can be pressurized, a pressure medium supply (4) to the threaded bolt tightening device (1), an adjusting ring (6) arranged in the cylinder and connected to the nut (2) by a form fit, and a rotary drive (7) for the adjusting ring (6) with a drive connection (16) to the adjusting ring (6), a rotation angle sensor (8) on the rotary drive, a control device (9) for driving the pressure medium supply (4) to the threaded bolt tightening device (1) and the rotation of the rotary drive (7), an input device (1), and the rotation of the rotary drive (7), an input device (10) for entering the pitch of the threaded bolt, and a computer device (11) for converting the rotation angl

Abstract: The invention provides an electronic wrench which includes means for measuring the instantaneous applied torque and means for measuring the instantaneous angle of rotation during tightening. The physical parameters of the screw connection for tightening and a setpoint value for the tightening are initially entered into the wrench via a keypad. During the tightening operation, the processor means calculate the instantaneous traction force on the screw fastener as a function of the measured instantaneous values of torque and angle and as a function of the recorded characteristics of the screw fastener.

Abstract: A constant force socket is constructed to include a socket body, which has an inner hole at one end and a set of teeth radially disposed inside the inner hole, a ratchet wheel, which is mounted inside the inner hole of the socket body and has a tool hole at one side and a set of radially arranged teeth at an opposite side, a screw member threaded into the inner hole of the socket body, and a compression spring supported between the ratchet wheel and the screw member to force the teeth of the ratchet wheel into engagement with the teeth of the socket body.

Abstract: The aim of the invention is to accomplish a new configuration or a reconfiguration of a screw system. To this end, a control unit (12) detects the actual components, which are installed in a screw system, as well as their characteristics, and said control unit (12) subsequently determines differences between the actual components and specified components that, for a specified configuration, were selected from a database (15), in which all available components are stored with their specific characteristics. Finally, actual and specified components that differ from one another are displayed on a display (16).

Abstract: The power screwdriver comprises a functional part (11) with a housing (14) through which a shaft (17) passes. The shaft (17) is provided with a toothing (18), into which a ratchet lever of the functional part (11) engages. A splined shaft toothing (20) of the shaft (17) has an insertion recess (21) that changes into a cavity (22). The wall of the cavity (22) is provided with a torsion sensor (23) and forms a measuring section (25) that is located in the area of the shaft (17) covered by the housing (14). A torsion measurement is effected in the measuring section (25). Due to the measuring section (25) being located in the area of the shaft covered by the housing (14), the shaft (17) is relatively short whereby it may be used under tight spatial screwing conditions involving a low head height above the screw. The power wrench is additionally provided with an angle measuring device (33) whereby torque and angle of rotation can be simultaneously provided and can be used for controlling and recording.

Abstract: A depth adjusting system for a screw gun comprises a base supported on the screw gun, an on/off collar removably attached to the base, and an adjusting collar and a depth locator mounted to the on/off collar. The adjusting collar rotates but cannot move axially relative to the on/off collar. Rotation of the adjusting collar causes the depth locator to move axially relative to the on/off collar for adjusting the depth setting. An indexing system is provided between the adjusting collar and the on/off collar for retaining the angular position of the adjusting collar and the depth setting. The on/off collar can be easily attached and detached from the base with a simple axial force applied to the on/off collar.

Abstract: A fluid-operated torque tool for tightening fasteners has a fluid-operated cylinder-piston unit; a drive actuated by said fluid-operated motor unit and engageable with a fastener for tightening the latter; and an ultrasonic probe built into said drive and bringable into contact with a part of the fastener when said drive engages the fastener, for sending a sound through said part of the fastener and receiving a signal indicative of an elongation of the part of the fastener.

Abstract: A depth adjusting system for a screw gun comprises a base supported on the screw gun, an on/off collar removably attached to the base, and an adjusting collar and a depth locator mounted to the on/off collar. The adjusting collar rotates but cannot move axially relative to the on/off collar. Rotation of the adjusting collar causes the depth locator to move axially relative to the on/off collar for adjusting the depth setting. An indexing system is provided between the adjusting collar and the on/off collar for retaining the angular position of the adjusting collar and the depth setting. The on/off collar can be easily attached and detached from the base with a simple axial force applied to the on/off collar.

Abstract: An attachment element for securing a depth stop (2) of a hand-held power tool (4) includes a pin guide 5, a fastening member (6), at least one nose (8a, 8b) for securing the attachment element (1) to the power tool (4), and at least one flange attachment nose (9) axially offset with respect to the at least one nose (8a, 8b) for formlockingly engaging in a respective opening (10, 10a) provided on the power tool (4).

Abstract: A pipe fitting tool is configured to aid a user in performing tasks frequently encountered by a pipe fitter or similar tradesman. The tool includes adjustable pliers, such as arc joint adjustable pliers, with a cutting portion for cutting and optionally stripping wire, and an impact surface for performing minor adjustments to hardware, such as adjusting the position of an object. One handle of the tool includes a prying/wedging portion and another handle of the tool includes a drive bit receiver. Molded hand grips may be provided on the handles and may include one or more receptacles for storing drive bits when not in use.

Abstract: A depth adjusting system for a screw gun comprises a base supported on the screw gun, an on/off collar removably attached to the base, and an adjusting collar and a depth locator mounted to the on/off collar. The adjusting collar rotates but cannot move axially relative to the on/off collar. Rotation of the adjusting collar causes the depth locator to move axially relative to the on/off collar for adjusting the depth setting. An indexing system is provided between the adjusting collar and the on/off collar for retaining the angular position of the adjusting collar and the depth setting. The on/off collar can be easily attached and detached from the base with a simple axial force applied to the on/off collar.

Abstract: A nosepiece assembly, such as a two-piece locator assembly. The assembly is selectively mountable on a tool housing in coaxial relation with a driven tool attachment. The locator assembly includes a mounting sleeve having a plurality of tabs that can be snapped into a circumferential groove on the tool housing to thereafter releasably restrain axial movement of the sleeve relative to the tool housing. The locator assembly and the tool housing also include cam members that are arranged to provide axial movement to the locator assembly when a rotational force is applied to the mounting sleeve. This arrangement permits the locator assembly to be easily and quickly snapped on and off the tool housing with one hand while allowing an improved attachment means to provide stability to the locator assembly when in a supported position.

Abstract: A nosepiece assembly, such as a two-piece locator assembly. The assembly is selectively mountable on a tool housing in coaxial relation with a driven tool attachment. The locator assembly includes a mounting sleeve having a 5 plurality of tabs that can be snapped into a circumferential groove on the tool housing to thereafter releasably restrain axial movement of the sleeve relative to the tool housing. The locator assembly and the tool housing also include cam members that are arranged to provide axial movement to the locator assembly when a rotational force is applied to the mounting sleeve. This arrangement 10 permits the locator assembly to be easily and quickly snapped on and off the tool housing with one hand while allowing an improved attachment means to provide stability to the locator assembly when in a supported position.

Abstract: The invention relates to a method and a device for producing screw assemblies, which can be preferably used in industrial production assembly processes, in workshops and in installation technology supervision involving high safety standards. The invention also relates to special screws to carry out said method. The invention is characterized in that the actual elongation of the screw is measured during screwing.

Abstract: A screw driving tool including an axially displaceable, drive spindle (5) located in the housing, a bit holder (6) having a shank (7) which releasably connects the bit holder (6) with the drive spindle (5), an axially adjustable depth stop (9) surrounding the bit holder (6) and a portion of the drive spindle (5) and connectable with the tool housing (1), and a sleeve-shaped dust-repelling member (13) arranged between the depth stop (9) and the bit holder (6) and releasably connected with the bit holder (6).

Abstract: A depth stop for a hand-held screw driving tool including a housing, a drive located in the housing for rotating a spindle about a spindle axis, and a chuck for receiving a working tool, connected with the housing and projecting from the housing in an axial direction defined by the spindle axis with the depth stop (3; 10; 16; 22) including a sleeve-shaped element for surrounding the chuck, connectable with the tool housing (2) and having at lease one axially extending opening formed in a wall of the sleeve-shaped element and piercing the wall through an entire wall thickness, and with the opening having, at its end remote from the housing (2) an entrance region (7; 21; 25) open in the axial direction.

Abstract: The application relates to a chuck (10) with a coupling and a housing (34) for clamping cap-screws and/or studs having a screw spindle (11), a drive spindle (12) fixed axially in relation to the screw spindle (11) with at least one spring-loaded and axially movable coupling (18) which can be drivably secured to the screw spindle (11) by a counter-component (59) and a spring-loaded, axially movable adjusting sleeve (22) which can render the coupling inoperative. The coupling (18) has at least one projection or recess (6) which can be functionally engaged with a mating recess or projection on the counter-component (59).

Abstract: An apparatus and method for attaching a processor bracket to a system board. The apparatus includes: a) a driver base, b) a plurality of air drivers secured to the driver base, c) a screwdriver rod, with a screwdriver head, extending from each air driver, and d) a positioning guide attached to the driver base. The method includes the steps of: a) positioning a processor bracket, having a processor bracket slot and having multiple bracket nuts, on a system board, b) positioning a positioning guide of a multiple nut driver within the processor bracket slot, c) contacting the bracket nuts with the corresponding screwdriver heads of the multiple nut driver, and d) exerting downward pressure on all the screwdriver heads.

Abstract: An actuating device for an electrical power wrench includes a base member connected to a motor and an output shaft is rotatably connected to the base member. A pin biased by a spring movably extends through the base member. A ball biased by a spring is received in the base member and engaged with a groove defined in an outside of the pin. A movable frame with a weight movably retained between two blocks on the base member and two springs connected between the two ends of the movable frame and the two blocks. An L-shaped actuating member is rotatably connected between the two blocks and pivotably connected to two lugs of the movable frame. When the base member is rotated by the motor, the movable frame radially moves due to the eccentric force to pivot the actuating member. When the force being put on to the pin by the actuating member overcomes the froce of the two springs, the pin extends to impact a plate extending radially outward from the output shaft to output a sudden and large torque.

Abstract: A torque wrench is provided with an electronic evaluation device for obtaining values measured by sensors in order to detect the torque and an angle of rotation. An acceleration sensor detects the acceleration of the angle of rotation (&agr;) whose measured values are chronologically integrated twice by an evaluation device in order to determine the angle of rotation (&agr;). The angle determination begins upon the reaching of a starting value of torque.

Abstract: A device for tightening a plurality of threaded members at the same time with proper torque without necessitating a cumbersome procedure of rotating the members one by one through a specified small angle at a time and without unequivalent tightening of the members, the tightening device (1) comprises two rotary shafts (6) each provided at a forward end thereof with a wrench portion (8) fittable to the threaded member (44), motors (3) for individually driving the rotary shafts (6) and a control unit (9) for detecting the tightening torque of each threaded member (44) and controlling the motor (3) based on the detected value to ensure proper tightening, the control unit (9) checking the tightening torque of each threaded member (44) as to whether the torque is within a predetermined range and whether the difference in tightening torque between the threaded members (44) is within a predetermined range.

Abstract: A screwdriver is composed of a handle, a magnetic member, a shank, and an adjusting device. The handle is provided with an axial hole in which the magnetic member is disposed. The shank is pivotally disposed in the axial hole such that the shank is fastened at one end thereof with a blade, and that another end of the shank is capable of a mutual attraction with the magnetic member. The magnitude of the mutual attraction is adjusted by the adjusting device to determine a pre-set desired torsional moment. The handle and the shank are capable of turning relative to each other at the time when a torsional moment exerting on the screwdriver is greater than the pre-set desired torsional moment.

Abstract: A chuck device for a power tool includes a follower rotatably and slidably received in a tube and coupled to and driven by a power tool and having a hole for receiving a driving stem. One or more balls are slidably received in the follower and may be forced inward of the follower to engage with the driving stem for allowing the driving stem to be driven by the follower. The balls may be disengaged from the driving stem when the ball is received in the annular recess of the tube for preventing the driving stem from being over-driven by the power tool.

Abstract: A hand tool (1) having a drive motor (12), a depth stop (16) by which the drive motor (12) can be automatically switched off when it is in contact with a workpiece (4), and a switching mechanism (21) in an electric circuit (22). The electric circuit (22) includes a switch (24) for switching the drive motor (12) on and off, a first contact element (25) for reversing the polarity of the drive motor (12) and a second contact element (26) for switching off the drive motor (12) by the use of the depth stop (16).

Abstract: A screwdriver of the present invention is designed for use with power tools. The screwdriver provides an automatic disengagement mechanism to prevent excess penetration of the screw into a work surface. The screwdriver has a housing enclosing the motor and a bracing member inserted into the housing, in which the bracing member is shaped to slide inside the housing. A sleeve member adjustably secured to the bracing member so that when the sleeve member is in a fully extended position in relation to the bracing member the spindle containing a driver bit is engaged to the motor through a transmission assembly, such as clutches or ball bearings. Alternatively, if the sleeve member is in a retracted position, then the spindle is disengaged from the motor thus stopping the rotation of the screw even if the motor is still rotating.

Abstract: A screwing device provides an ultrasound-controlled tensioning of a screw connection. A measurement of the pre-tensioning force of the screw connection can be performed without complete fitting of a screwing tool on the screw connection. The screwing tool for this purpose is displaceable axially within a certain limit relative to the rotary drive shaft. The screwing tool is pre-tensioned by a spring in direction toward the screw connection, so that a contact pin arranged centrally inside the screwing tool for electrical contacting of a vibration body is arranged always inside the screwing tool to be protected.

Abstract: A clutch driver device for releasing torque between a power drill and a screwdriver when the screw being driven reaches a predetermined depth. The clutch mechanism including a hollow release cylinder slideably fitted on a drive shaft integrally formed in coaxial relation with a chuck shank to be inserted into the chuck of a power drill. The release cylinder is movable from a first position where the release cylinder holds several clutch balls against planar faces of a hexagonal end of a drive shank used to drive the screw into the work piece to a second position where the release cylinder releases the clutch balls held against the planar faces of the drive shank so that the screw driving end of the driver is disengaged from the power drill. The release cylinder being moved from the first position to the second position by an actuator sleeve positioned between the work piece and the release cylinder.

Abstract: A depth adjusting system particularly for power-driven screwdrivers comprising an adjustment collar that is releasably fitted to the housing of the tool and a depth locator which screws onto the collar for non-rotational axial movement relative to the housing. The adjustment collar has a rearward cylindrical portion that includes an inner circumferential surface having a circumferential groove and a plurality of axially extending recesses. The depth adjusting system further comprises a pair of arcuate spring members attached to the nose portion of the housing and formed to include an arcuate rib portion for engaging the circumferential groove. The arcuate spring members also include a plurality of cantilevered spring fingers for biasing the arcuate rib portions into engagement with the circumferential groove.

Abstract: A power driven screwdriver including a housing, a spindle rotatably and axially movably disposed within the housing, a motor for driving the spindle, and a clutch mechanism interposed between the motor and the spindle. The clutch mechanism includes a drive clutch member rotatably driven by the motor, a driven clutch member rotatable with the spindle, and a drive clutch shifting mechanism. The drive clutch shifting mechanism is operable to move the drive clutch member from a first position to a second position spaced from the first position in a forward direction toward the driven clutch member when the driven clutch member is brought to engage the drive clutch member. The drive clutch shifting mechanism is also operable to move the drive clutch member from the second position to the first position when the driven clutch member is brought to be disengaged from the drive clutch member.

Abstract: A powered screwdriver includes a tool head, a lower cylinder, a hollow shaft insertable through the lower cylinder, an upper cylinder engageable with the lower cylinder, a passage defined in the upper cylinder, a motor-driven axle insertable through the passage and engageable with the hollow shaft so that the hollow shaft and the motor-driven axle are slidable but not rotatable with respect to each other and an actuating device including a lower ring securely received in the passage, an actuator with a collar slidably mounted on the motor-driven axle and a tab radially extending from the collar and projecting through a slot defined in the upper cylinder, a spring mounted on the motor-driven axle, an upper ring securely received in the passage and a push-button switch mounted on the upper cylinder. When the powered screwdriver is pushed against a screw, the motor-driven axle is further inserted into the hollow shaft. The collar of the actuator is pushed by means of the hollow shaft.

Abstract: The invention discloses an adjustable closure force control device for a screw-type vise and a method for selectively controlling the closure force of the vise. The control device uses a nut barrel for threadingly receiving a screw of a screw-type vise with a movable vise jaw being operatively connected to the screw so that advancement of the screw through the nut barrel results in vise jaw closure about an article to be held. The closure force control selectively controls the advancement of the screw through the nut barrel in response to the resistance to movement encountered by the movable vise jaw. In a preferred form of the invention, a compressible detent plunger cooperates with a series of apertures spaced about the nut barrel periphery. This allows the nut barrel to rotate with the screw, ending screw advancement and jaw closure despite continued screw rotation, when the predetermined resistance to jaw movement is encountered.

Abstract: A power hand tool for driving a fastener a desired depth into a workpiece. The power tool includes a depth adjust sleeve for varying a resulting driving depth of the fastener into the workpiece. A depth indicator is included to allow a user to gauge the resulting driving depth of the fastener into the workpiece based on his adjustment of the depth adjust sleeve. In one embodiment, the depth indicator comprises a marker coupled to the depth adjust sleeve such that its location varies monotonically in response to varying the resulting driving depth, a lens to allow the marker to be clearly seen by the user, and a scale to which the location of the marker is compared. A driving mechanism is then used for driving the fastener into the workpiece until the resulting driving depth is attained.

Abstract: A fastener support apparatus for facilitating the installation of individual screws into a work surface, and wherein the fastener support apparatus works in combination with a drive assembly having a clutch. The fastener support apparatus includes a drive shaft oriented in force receiving relation relative to the clutch; a depth adjustment assembly located in a predetermined orientation relative to the drive shaft; a rotatable bit for engaging the head of a screw and which is disposed in force receiving relation relative to the drive shaft; a base member fixed on the rotatable bit; a sleeve telescopingly borne by the base and reciprocally moveable relative thereto; and a screw support assembly reciprocally borne by the base member and matingly interfitted with the sleeve. The screw support assembly defines a screw receiving station which is operable to receive the head of the screw.

Abstract: The present invention provides an impact wrench and a bolt-tightening method such that a spring force is applied, through the circumference of a spindle coupled with the output shaft of an electric motor, in the forward direction to a hammer which is capable of forward and rearward movement and rotational motion following the spindle. The hammer and an impact shaft are brought in coaxial mesh alignment by leaving a gap between them in the direction of rotation so that when a bolt to be tightened is inserted into a socket fixed to an end of the impact shaft to permit the bolt to be tightened, the mesh contact with the impact shaft is released as a result of the hammer being lifted up in the rearward direction against the reaction force due to the tightening of the bolt. An impact sensor detects release of the hammer from the impact shaft and an angle sensor measures the angle of rotation of the impact shaft.

Abstract: A spring loaded screw and an associated driver for use in orthopedic applications, particularly for temporarily securing cutting guides and the like to the tibia and femur for preparation of the bone surfaces in a total knee replacement. A slidable sleeve on said screw is spring biased away from the driver. As the screw sleeve seats, the sleeve slides upwardly against the compression spring to disengage the driver from the proximal end of the screw. The driver contains a slidably disposed central cylinder which can be axially moved by sliding an externally mounted sleeve. To retract the screw, the driver sleeve is advanced toward the screw to urge the cylinder toward the proximal end of the screw sufficiently far to enable grasping of the proximal end of the screw for retraction thereof.

Abstract: A depth adjusting system particularly for power-driven screwdrivers comprising an adjustment collar that is releasably fitted to the housing of the tool and a depth locator which screws onto the collar. The adjustment collar has a forward cylindrical portion and an enlarged rearward cylindrical portion that includes a pair of diametrically opposed, axially extending cantilevered spring fingers for detachably connecting the adjustment collar to a circular opening in the housing. The free ends of the spring fingers are provided with a hook and groove that are adapted to engage and mate with a corresponding circumferential groove and rib in the housing opening, thereby permitting relative rotation of the adjustment collar to the housing which serves to set the relative axial position of the depth locator.

Abstract: A fastener support apparatus for facilitating the installation of individual screws into a work surface which includes a rotatable bit for engaging the head of the screw; a housing borne by the rotatable bit and defining a passageway, and wherein the bit is received in the passageway and the housing simultaneously rotates with the bit; a screw support assembly movably borne by the housing, the screw support assembly including a passageway defining a screw receiving station and which is operable to receive the head of the screw; a locking assembly movably borne by the screw support assembly and operable to travel from a first, partially occluding position relative to the screw receiving station to a second, substantially nonoccluding position; and an actuating assembly movably borne by the screw support assembly and which positions the locking assembly in the first or second positions.

Abstract: A two-piece depth adjustment assembly for a hand-held power tool. The depth adjustment assembly includes a mounting sleeve which can be snapped onto the housing of the power tool to fix the sleeve relative to the housing and which can also be snapped off the housing. The depth adjustment assembly also includes a locator having external threads engaged with complementary internal threads on the sleeve so that rotation of the locator relative to the sleeve displaces the locator axially forwardly and rearwardly. To maintain the locator in a predetermined angular position relative to the sleeve, the depth adjustment assembly includes indexing means including resilient fingers on the locator and axially extending recesses on the sleeve for releasably housing the fingers. The result is a depth adjustment assembly which does not require an operator to disturb a previously set depth setting when changing tool attachments and which will not slip from the adjusted setting.

Abstract: A power driven screwdriver includes a clutch mechanism provided between a spindle for mounting a driver bit thereon and a drive member rotatably driven by a motor. The clutch mechanism includes a protrusion formed on one of the spindle and the drive member and a recess formed on the other for engagement with the protrusion. The protrusion includes a conical outer surface having a diameter decreasing toward the protrusion. The recess includes a conical inner surface which corresponds substantially to the conical outer surface of the protrusion and has a diameter increasing toward the recess. The conical outer surface has a second central axis displaced from the first central axis of the spindle or the drive member by a first distance. The conical inner surface has a third central axis displaced from the first central axis by a second distance.

Abstract: A screwing device has means for measuring the tightening strain in a bolt and is of the type in which a support arm housing transmission members supports a screwing head by means of a transmission shaft connected to the transmission members, the screwing head being movable relative to the support arm and housing means, which are fixed relative to the arm, for supporting the measuring means.

Abstract: A power driven screwdriver includes a device interposed between a spindle and a housing for preventing rotation of the spindle. The device includes a first member and a second member. The first member is disposed on the spindle and is rotatable therewith. The second member is fixed to the housing and axially opposed to the first member. The first and the second members include a first conical surface and a second conical surface, respectively. The first and the second conical surfaces have central axes parallel to a central axis of the spindle, respectively, and are opposed to each other. At least one of the central axes of the first and the second conical surfaces is displaced from the central axis of the spindle. The first conical surface contacts the second surface when the spindle is positioned at a first position where a clutch mechanism disconnects the spindle from a motor.

Abstract: A fastener support apparatus for facilitating the installation of individual screws into a work surface including means for driving individual screws into the work surface; a support member borne on the driving means; a screw support assembly borne on the support member and defining a screw receiving station which is operable to receive the head of the screw; a locking assembly borne on the screw support assembly and operable for travel from a first, partially occluding position relative to the screw receiving station to a second, substantially nonoccluding position; and an actuating assembly borne on the screw support assembly and which positions the locking assembly in the first or second positions.

Abstract: Depth locator apparatus for insert bit holders provides a means for adjustably setting the depth of a screw head relative to a fastened work-piece surface. The apparatus is comprised of a sleeve, externally threaded, and with an internal bore to affixedly engage the drive end of a bit holder. The apparatus additionally includes two locking rings with internal threads to engage the external thread of the sleeve. The depth of the fastener relative to the work-piece surface is determined by the location of the outermost lock ring, relative to the insert bit, as it locates against the surface, being constrained against axial movement by the rearmost lock ring. The forward ring includes a work engaging cap that rotates relative to the sleeve and the rings.