Abstract: The invention is a hand tool for enhancing strength of a working head, which comprises: a main body with two parallel ears spaced apart at a front end; a working head with a pivotal portion pivotally connected between the ears of the main body; a column with one end connected to a periphery of the pivotal portion; and a strengthening portion extending from the periphery of the pivotal portion toward the column, and disposing at a junction of the pivotal portion and the column. An outer diameter of the strengthening portion is greater than an outer diameter of the column, the strengthening portion is capable of enhancing a strength of the column, relatively improving a torsion applied by the column to a workpiece, and enhancing durability and strength of the column.

Abstract: A central connector for a universal joint and a universal joint utilizing said central connector. The central connector includes a substantially cylindrical body. The connector further includes a first and second pair of arms positioned orthogonal to one another. The body of the central connector also includes a male spherically concave surface between the first pair of arms, a female spherically concave surface between the second pair of arms. The body further defines an opening allowing communication between the male and female spherically concave surfaces.

Abstract: A hex tool including a hex head having a hex portion for engaging socket head cap screws or wrenches. The hex portion also having a body portion extending from the hex portion. The body portion having a spherical-shaped cavity disposed therein. The hex tool also includes a handle with a ball end and a primary handle portion. The ball end disposed in the spherical-shaped cavity to provide the hex tool a significant range of motion during use. Another type of hex tool having a hex head having a hex cavity for engaging a hex head bolt. The hex head also having a body portion extending from the hex cavity. The body portion having a spherical-shaped cavity disposed therein. The hex tool also including a handle with a ball end and a primary handle portion. The ball end disposed in the spherical-shaped cavity to provide the hex tool a significant range of motion during use.

Abstract: An angle drive socket tool that provides interchangeable multi-angular socket for inserting a tool. A drive shaft has a driver engagement end and a magnetic enabled concave fastener receiving end with retainment and drive engagement pins. A driver component having a spherical insert end with a drive pin engagement channel extending there about an oppositely disposed drive configured input end, such as a hex socket suitable to drive a fastener of choice as illustrated in the preferred embodiment.

Abstract: A two-stage universal joint includes a sleeve, a driving member and a restricting member. The sleeve defines an axial direction and includes a receiving groove and an assembling portion. The driving member includes a polygonal ball head. The polygonal ball head has a plurality of arcuate portions. The polygonal ball head is inserted into the receiving groove. The driving member is slidable between a first position and a second position relative to the sleeve.

Abstract: A two-stage universal joint includes a sleeve member, a driving member, and an elastic member. The sleeve member defines an axial direction and has a sleeve portion and a connection portion. The sleeve portion has a receiving groove having plural positioning protrusions extending axially on an inner wall thereof. One of the positioning protrusions has a recessed portion. The driving portion has a polygonal ball-joint having plural arc-face sections. The polygonal ball-joint is inserted into the receiving groove. The driving member is slidable with respect to the sleeve member between a first position and a second position. The polygonal ball-joint has a biasing member tending to move outward.

Abstract: According to a first aspect of the invention we provide a self-retaining drive shaft assembly for use with a device for tightening and loosening of an industrial fastener having: a drive retainer drive shaft; a drive retainer cap; a drive retainer plunger; and a drive retainer segment assembly. The segment assembly is formed between the drive shaft and the cap. The cap is formed between the segment assembly and the plunger. The segment assembly, the cap and the plunger are formed substantially within the drive shaft. Advantageously the retainer assembly is of unitary construction; requires no loose parts or external implements to engage and secure the drive shaft to a drive head of the device; reduces likelihood of device failure during operation due to improper engagement of the drive shaft; and increases user safety during device operation.

Abstract: An adjustable wrench provides a drive head that rotates about two axis with respect to a drive gear. The wrench includes a wrench casing having an orbital cavity. A drive head, drive gear, pawl gear and an axis pin bushing are positioned in the orbital cavity. A drive head axis pin connects the drive head to the axis pin bushing such that the drive head can rotate about a first axis with respect to the drive gear. A drive gear axis pin connects the drive gear to the axis pin bushing such that the drive head can rotate about at second axis with respect to the drive gear. The pawl gear and drive gear rotate the drive head about a third axis with respect to the wrench casing.

Abstract: An adjustable tool extender comprising an elongated body, where the elongated body is divided between a handle and an extendable drive; an engaging end at a far end of the extendable drive, where the engaging end fits into a tool bit; a receiving end at a far end of the handle, where the receiving end receives a drive on a tool; and a means for locking along the handle, where the means for locking extends the extendable drive a distance from the handle.

Abstract: A tool having a flexible extension shaft, a first end and, a second end and capable of being bent about its axis. The tool transfers rotary motion from a device to an implement. Both of the ends may be capable of independently being bent about the axis. The shaft may include a male member and a female member for a kit. Further, one end of the tool may include a rotatable member having a first and second implement.

Abstract: A surgical bone screw 1) and driver (31), and a method for using them for repairing an osteotomy or fracture. The screw has a shaft having a head (5) at its proximal end, screw threads (3) at its distal end and a compression member (7) between the head and the screw threads. In an embodiment, the threads are self-tapping and self-drilling, the head is polygonal, and the sides of the polygon are convex. The driver turns the screw until the threads cross a fracture site and the compression member contacts the proximal bone fragment. The threads and compression member draw the fragments together and leaves the head entirely clear of the bone surface. The screw is removed through a small incision. Tilting the driver to allow the socket to engage an inwardly extending lower portion of the head permits the driver to lift the screw out of the bone.

Abstract: A wrench includes a first part having a first pivotal portion, a first recess and a first hole, a second part having a second pivotal portion, a second recess and a second hole, and a third part which is received in the first and second recesses. The third part has third, fourth and fifth holes, and a control slot. A control unit is connected to the third part and has four urging members, two first acting members and a second acting member. The urging members are located in the third and fourth holes, and engaged with the first and second holes to pivotably connect the first and third parts, and the second and third parts. The first acting members are located in the fifth hole. The second acting member is located in the control slot and controls the first acting members to contact and the urging members or not.

Abstract: A universal joint structure for a tool contains an operating rod, a fitting sleeve, and a retaining member. The operating rod includes a universal joint formed on one end thereof, the universal joint is formed in a polygonal sphere shape, the fitting sleeve includes a polygonal locking groove defined thereon for fitting the universal joint, the fitting sleeve also includes a circular recess arranged adjacent to an opening of the locking groove and retaining with the retaining member. The retaining member is a C-retaining ring and includes a tilted guiding face defined around one surface thereof, and wherein one end of the titled face away from the circular recess is larger than another end of the titled guiding face adjacent to the circular recess so that when the universal joint is fitted into the locking groove, the titled guiding face retains with the universal joint of the operating rod.

Abstract: A universal joint includes first and second parts interconnected by a coupling element, and a coupling mechanism for detachably engaging tool attachments such as sockets. The disclosed coupling mechanisms include an engaging element and an actuating element. The engaging element can include a pin, and the pin can be oriented either obliquely or longitudinally in the drive stud of the universal joint. The actuating element can include a collar and a central portion that crosses the central longitudinal axis of the drive stud. The central portion can be offset along the longitudinal axis toward the coupling element, and the actuating element can be configured to extend into an aperture formed by the coupling element and the second part of the universal joint.

Abstract: A wrench includes a body having a driving head which has a ratchet mechanism having a rotatable ratchet gear. An engaging hole is defined in one side of the ratchet gear and a groove is defined in the inner periphery of the engaging hole. A stop portion extends from the other side of the ratchet gear. A universal connector has a driving part extending from the first end thereof and a head is located on the second end of the universal connector. The head is located within the engaging hole and swingable relative to the axis of the head and non-rotatable relative to the axis of the head. A resilient member is located in the engaging hole and located between the stop portion and the head. A clip is engaged with the groove so as to restrict the universal connector from dropping out from the engaging hole.

Abstract: A driver accessory includes a housing having a first housing portion and a second housing portion movable relative to the first housing portion, an input shaft at least partially received in the first housing portion and defining a first axis, and an output shaft at least partially received in the second housing portion and defining a second axis. The output shaft is supportable by the housing in a first position relative to the input shaft in which the first and second axes are substantially parallel, and in a second position relative to the input shaft in which the first and second axes are non-parallel. The driver accessory also includes a locking mechanism operable to secure the second housing portion relative to the first housing portion when the output shaft is in the first position and the second position relative to the input shaft.

Abstract: A tool extension includes a positioning ring engaged with a housing, a detent extendible into a bore of the housing, a shank attached to the housing for supporting a tool element, a shaft engaged in the housing and having two or more outer peripheral grooves for engaging with the detent, and a control device having a sleeve and a control ferrule secured together and engaged onto the housing, and two spring biasing members engaged with the positioning ring and the sleeve and the control ferrule, and the control ferrule includes two troughs for engaging with the detent and for defining an inner peripheral actuator between the troughs and for easily operating the sleeve and the control ferrule of the control device.

Abstract: A wrench includes a body and a driving head connected to the body. The body includes a push rod, two first push pieces, two second push pieces and a push unit so as to control the position and angle that the driving head rotates relative to the body. The driving head includes multiple positioning holes, an engaging protrusion, a through hole in the engaging protrusion, a bead and a control rod to control the engagement or disengagement between the engaging protrusion and the socket.

Abstract: A tool extension for a socket wrench includes a jointed, articulated series of square-drive male/female adapter ends with intermediate couplers having hex ball-head and socket joints. Three such intermediate couplers together in one series allow for an overall 90-degrees of flex. Each coupler has a bell body over which a pliable control cover is stretched. Each hex ball head and socket joint is bridged over by a corresponding pliable control cover which then snaps over a retaining lip just under a neck.

Abstract: A wrench includes a handle, a yoke, a shaft, a head, a mandrel, a first transmitting unit and a second transmitting unit. The shaft includes a first section securely connected to the handle and a second section rotationally inserted in the yoke. The head is pivotally connected to the yoke. The mandrel is inserted through the head. The first transmitting unit can be used to transmit a small torque to the mandrel from the handle spun relative to the yoke. The second transmitting unit can be used together with the first transmitting unit to transmit a large torque to the mandrel from the handle pivoted together with the yoke.

Abstract: A two-section tool joint comprises a support member including a polygonal ball knob disposed on one end thereof; an acting head including a receiving chamber fixed on end thereof, and on a side wall of the receiving chamber being arranged a plurality of raised rims in response to the ball knob; a limiting structure defined between the support member and the acting head so that the ball knob of the support member is limited in the receiving chamber and moves between a first and a second positions; wherein the raised rims are longitudinally defined on a side wall of the receiving chamber and spaced apart equally from each other, the number of the raised rims is in response to that of the angles of the ball knob, and each raised rim is provided with a convex arc contacting surface so that the support member rotates with the acting head.

Abstract: An angularly accessible head assembly for a torque hand tool includes a drive shank and a head rotatably disposed on a coupling shell about drive and driven axes that intersect with each other by an angle of at least 90 degrees. First, second and third force transmitting members are disposed to couple the drive shank and the head by means of four joint subassemblies, each having a socket wall surface and an orientable portion matingly engaged with each other. A torque exerted upon the drive shank is transmitted to the head through the force transmitting members and the joint subassemblies so as to activate a rotational movement of a threaded connector.

Abstract: A hand tool comprises a shaft including a first coupled portion, a double-ended joint including a second coupled portion coupled to the first coupled portion and a third coupled portion. The double-ended joint is pivotable with respect to the shaft between a first position they are coaxial and a second position they have various relative tilting positions. An interconnecting member includes a fourth coupled portion coupled to the third coupled portion and a mounted portion. The interconnecting member is pivotable with respect to the double-ended joint between a first position they are coaxial and a second position they have various relative tilting positions.

Abstract: A tool assembly includes a body having a receptacle. An adapter includes a shoulder, a head, and a neck interconnecting the head and the shoulder. The head engages with an inner periphery of the receptacle, allowing joint rotation of the adapter and the body. The head is slideably received in the receptacle between first and second positions. A C-clip is received in a retaining groove in the inner periphery of the receptacle. When the head is in the first position, the shoulder is received in the receptacle, the C-clip distends and clamps the shoulder to keep the adapter to be coaxial to the body. When the head is in the second position, the shoulder is outside of the receptacle, the C-clip abuts an outer periphery of the head, and the head is rotatable to a position such that the adapter is at an angle to the body.

Abstract: A bit holder and an interchangeable bit that can pivot or articulate relative to the bit holder. The bit holder includes a multi-depth socket for receiving the interchangeable bit. The different depths of the socket determine whether the interchangeable bit operates as a straight-on bit or an off-angle bit. An outer sleeve can slide along a longitudinal axis of a shaft to change the depth of the socket. Alternatively, opposite ends of the bit holder have different depth sockets for receiving the interchangeable bit and/or a shank portion. By flipping over the bit holder, the interchangeable bit can operate as either a straight-on bit or an off-angle bit.

Abstract: An easily assembled swivel mount device includes a housing having a peripheral shoulder abutment and a peripheral ramp which extends toward the shoulder abutment and which terminates at a peripheral blocking protrusion, a swivel member swivelably mounted on the housing by means of a shaft, and a sleeve member having a leading abutment edge which is brought to abut against the shoulder abutment, and an inner peripheral guideway which extends away from the leading abutment edge and which terminates at a peripheral blocked ledge such that the blocked ledge can be retained behind the blocking protrusion after slipping over the peripheral ramp.

Abstract: A tool coupling structure comprises a first post member including a fitting end disposed on one end thereof and a polygonal cavity mounted on another end thereof; the cavity including a hole formed on an outer wall thereof, and the hole including a biasing element installed therein; a second post member including a coupling end fixed on one end thereof and a polygonal sphere knob formed on another end thereof to be fitted to the cavity of the fist post member, and the sphere knob including an elastic engaging member fixed on a peripheral side thereof in response to the hole of the first post member to be retained in the hole.

Abstract: The tool adaptor of the present invention includes a first work piece, a second work piece and a block element. The work pieces are pivoted with each other. The block element is sleeved on the first work piece and slidable between a first position and a second position. As the block element locates at the second position, it engages with the first and second work pieces simultaneously to restrict the sway of the first work piece about the second work piece. The tool adaptor is therefore switchable between a swayable mode and a fixation mode by moving the block element between such positions.

Abstract: An extension shaft for holding a tool for rotary motion of the tool includes a first end adapted to cooperate with a chuck of a handheld instrument and a second end including a tool holder for holding the tool for rotary driven motion thereof. The tool holder includes a base portion operatively connected to the extension shaft and a swivel portion capable of holding the tool. The swivel portion is pivotly coupled to the base portion through a pivot assembly, wherein the tool is capable of being rotated about an angle with respect to an axis of the chuck through rotation of the extension shaft in response to rotation of the chuck.

Abstract: A universal joint includes first and second parts interconnected by a coupling element, and a coupling mechanism for detachably engaging tool attachments such as sockets. The disclosed coupling mechanisms include an engaging element and an actuating element. The engaging element can include a pin, and the pin can be oriented either obliquely or longitudinally in the drive stud of the universal joint. The actuating element can include a collar and a central portion that crosses the central longitudinal axis of the drive stud. The central portion can be offset along the longitudinal axis toward the coupling element, and the actuating element can be configured to extend into an aperture formed by the coupling element and the second part of the universal joint.

Abstract: A universal joint includes a coupling member having an end for coupling with a tool. A body includes a rounded base pivotably mounted to the other end of the coupling member. The body further includes a drive column spaced from the rounded base along an axis. A reinforcing section is intermediate the rounded base and the drive column. The reinforcing section includes an outer periphery having a recessed portion with a receptacle extending in a radial direction perpendicular to the axis. A control member is moveably received in the receptacle to control coupling of the drive column and an object to be driven. In any case, a spacing from an outer end of the control member to the axis in the radial direction is substantially not larger than a spacing from the outer periphery of the reinforcing section to the axis in the radial direction.

Abstract: A two-section tool joint comprises a first rod, an engaging element, a second rod and a limiting element. The two-section tool joint utilizes an elastic engaging structure to obtain an engaging effect during a multi-angle screwing/unscrewing operation, meanwhile, the tool joint can be fixed stably, avoiding the retraction of the tool joint and reducing the difficulty and inconvenience of the screwing/unscrewing operation.

Abstract: A universal joint includes first and second parts interconnected by a coupling element, and a coupling mechanism for detachably engaging tool attachments such as sockets. The disclosed coupling mechanisms include an engaging element and an actuating element. The engaging element can include a pin, and the pin can be oriented either obliquely or longitudinally in the drive stud of the universal joint. The actuating element can include a collar and a central portion that crosses the central longitudinal axis of the drive stud. The central portion can be offset along the longitudinal axis toward the coupling element, and the actuating element can be configured to extend into an aperture formed by the coupling element and the second part of the universal joint.

Abstract: A universal joint comprises a tool set including a driving portion secured on one end thereof and a spherical member fixed on another end thereof; a base including a receiving chamber disposed on one end thereof and a circular groove mounted on another end thereof to receive the spherical member of the tool set, between the groove and the spherical member of the tool set being defined a stooping structure, the stopping structure including two opposite sliding slots and two locking tabs relative to the sliding slots, and a locking structure disposed on the base and including two annular recesses arranged on an outer periphery of the base and communicating with the groove to receive two engaging members respectively, on an outer periphery of the base being fitted a pressing member in which an abutting surface formed therein.

Abstract: A driver accessory includes a housing having a first housing portion and a second housing portion movable relative to the first housing portion, an input shaft at least partially received in the first housing portion and defining a first axis, and an output shaft at least partially received in the second housing portion and defining a second axis. The output shaft is supportable by the housing in a first position relative to the input shaft in which the first and second axes are substantially parallel, and in a second position relative to the input shaft in which the first and second axes are non-parallel. The driver accessory also includes a locking mechanism operable to secure the second housing portion relative to the first housing portion when the output shaft is in the first position and the second position relative to the input shaft.

Abstract: An universal joint capable of replacing various tool sets contains a tool set having a driving portion disposed on one end thereof and a spherical knob fixed on another end thereof, and the spherical knob includes two retaining segments disposed on two sides thereof respectively; a holder having a fitting portion disposed on one end thereof and a chamber fixed on another end thereof to receive the spherical knob, and between the holder and the tool set being defined a locking structure, wherein the locking structure includes a hole fixed on the retaining segment of the tool set to communicate with the chamber. The hole includes a lock boss placed therein, and the holder also includes a sleeve member fitted thereon. The sleeve member includes an abutting face for pushing the lock boss to extend out of the chamber of the holder to engage with the retaining segments.

Abstract: An extensive device is disclosed to connect a bit to a handle of a tool. The extensive device includes a rod, a polygonal sphere, a socket and a retaining element. The polygonal sphere is connected to the rod near an end. The socket includes a polygonal cavity, a tunnel and a groove. The polygonal cavity receives the polygonal sphere so that the surface of the polygonal sphere is in contact with the wall of the polygonal cavity. The rod and the socket are coaxial when the end of the rod is disposed in the tunnel. The rod can be pivoted relative to the socket when the end of the rod is located outside the tunnel. The groove is defined in the wall of the polygonal cavity. The restraining element is fit in the groove of the socket to keep the polygonal sphere in the polygonal cavity of the socket.

Abstract: A driving tool assembly includes a drive component adapted to be connected to a power tool or hand tool. A driven component is pivotally connected to the drive component and is adapted to receive a tool bit, drill bit, or otherwise provide a nut driver or socket wrench. A locking mechanism is provided for lockingly engaging the driven component to be in co-axial alignment with the drive component. The drive component includes a shaft or a mandrel having a driving shank formed or provided on one end thereof. The driving shank has a non-circular cross-section formed or defined by three or more curved and planar sidewalls. The number of sidewalls preferably includes three, four or six sidewalls, for engaging with a non-circular cavity of the driven component.

Abstract: A two-section tool joint comprises a first rod, an engaging element, a second rod and a limiting element. The two-section tool joint utilizes an elastic engaging structure to obtain an engaging effect during a multi-angle screwing/unscrewing operation, meanwhile, the tool joint can be fixed stably, avoiding the retraction of the tool joint and reducing the difficultly and inconvenience of the screwing/unscrewing operation.

Abstract: A hand tool comprises a shaft including a first coupled portion; a double-ended joint including a second coupled portion coupled to the first coupled portion and a third coupled portion; wherein the double-ended joint is pivotable with respect to the shaft between first and second positions; an interconnecting member including a fourth coupled portion coupled to the third coupled portion and a mounted portion; and wherein the interconnecting member is pivotable with respect to the double-ended joint between first and second position.

Abstract: A tool assembly includes a body having a receptacle. An adapter includes a shoulder, a head, and a neck interconnecting the head and the shoulder. The head engages with an inner periphery of the receptacle, allowing joint rotation of the adapter and the body. The head is slideably received in the receptacle between first and second positions. A C-clip is received in a retaining groove in the inner periphery of the receptacle. When the head is in the first position, the shoulder is received in the receptacle, the C-clip distends and clamps the shoulder to keep the adapter to be coaxial to the body. When the head is in the second position, the shoulder is outside of the receptacle, the C-clip abuts an outer periphery of the head, and the head is rotatable to a position such that the adapter is at an angle to the body.

Abstract: A universal joint includes a coupling member having an end for coupling with a tool. A body includes a rounded base pivotably mounted to the other end of the coupling member. The body further includes a drive column spaced from the rounded base along an axis. A reinforcing section is intermediate the rounded base and the drive column. The reinforcing section includes an outer periphery having a recessed portion with a receptacle extending in a radial direction perpendicular to the axis. A control member is moveably received in the receptacle to control coupling of the drive column and an object to be driven. In any case, a spacing from an outer end of the control member to the axis in the radial direction is substantially not larger than a spacing from the outer periphery of the reinforcing section to the axis in the radial direction.

Abstract: A machine tool includes a driver, a tool holder, and a locking device in the form of, for example, an alignment collar. In use, the machine tool carries a tool, such as a surface refinishing bit, which may be lowered into a workpiece bore, such as a cylinder head valve seat, and subsequently rotated by a machine spindle for resurfacing the bore. The machine tool receives a pilot shaft placed in a reference bore associated with the workpiece bore. The pilot shaft functions to ensure general alignment of the machine tool cutting axis and the refinishing surface.

Abstract: An extension device for a socket member may include a ratchet member, a first U-joint member connecting the ratchet member and the socket member, a first sleeve member for connecting the ratchet member and the socket member to inhibit the operation of the first U-joint member. The sleeve member may include a threaded connection to the ratchet member, and the U-joint member may include a first ball and socket member. The U-joint member may include a first central shaft member, and the first central shaft member may radially rotate on a first traverse shaft member. The traverse shaft member may be connected to a first pair of arms, and the first arms may be connected to the socket member. The extension device may include a second U-joint member, and the extension device may include a second sleeve member to inhibit the operation of the second U-joint member. The second sleeve member may include a threaded connection, and the second U-joint member may include a second ball and socket member.

Abstract: A driving tool includes a tool stem having a non-circular spatial engaging member and having one or more flat surfaces, a tool shank having a non-circular socket opening and having one or more curved surfaces for pivotally receiving the spatial engaging member of the tool stem and for allowing the tool shank to be selectively tilted relative to a longitudinal axis of the tool stem. A control ferrule is slidably engaged onto the tool shank and slidable and engageable onto the tool stem for retaining the tool shank in line with the longitudinal axis of the tool stem and for preventing the tool shank from being tilted relative to the tool stem to other angular position.

Abstract: A universal joint includes first and second parts interconnected by a coupling element, and a coupling mechanism for detachably engaging tool attachments such as sockets. The disclosed coupling mechanisms include an engaging element and an actuating element. The engaging element can include a pin, and the pin can be oriented either obliquely or longitudinally in the drive stud of the universal joint. The actuating element can include a collar and a central portion that crosses the central longitudinal axis of the drive stud. The central portion can be offset along the longitudinal axis toward the coupling element, and the actuating element can be configured to extend into an aperture formed by the coupling element and the second part of the universal joint.

Abstract: A tool device includes a shaft having a noncircular socket opening for slidably and tiltably receiving a three-dimensional engaging member of a tool member for allowing the tool member to be tilted relative to the shaft to different angular position, and the shaft includes an engaging hole for receiving a driven member, a control ferrule may retain the shaft in line with the tool member, and a sleeve includes a non-circular opening for engaging with another driven member, the sleeve is rotatable in concert with the shaft for allowing the driven members of different diameters or dimensions to be selectively rotated or driven by the shaft and the sleeve.

Abstract: A driving tool includes a tool stem having a non-circular spatial engaging member and having one or more flat surfaces, a tool shank having a non-circular socket opening and having one or more curved surfaces for pivotally receiving the spatial engaging member of the tool stem and for allowing the tool shank to be selectively tilted relative to a longitudinal axis of the tool stem. A control ferrule is slidably engaged onto the tool shank and slidable and engageable onto the tool stem for retaining the tool shank in line with the longitudinal axis of the tool stem and for preventing the tool shank from being tilted relative to the tool stem to other angular position.

Abstract: An assistant connector for a tool comprises a connecting member, a transmission member and a positioning sleeve. The connecting member is provided with a first engaging sleeve on one end thereof, an engaging section on the other end thereof and a pivot head extending from the engaging section. The pivot head is inserted in one end of a pivot groove of the transmission member provided with a second engaging sleeve on the other end thereof, for forming a freely rotary relationship. In the periphery of the transmission member are formed with a first and a second annular grooves for engaging with a C-shaped ring, respectively. The positioning sleeve formed with a first and a second annular positioning grooves in the inner surface thereof mounts on the transmission member. Thereby, it can meet the requirements of a straight-pole operational mode and a rotary operational mode, achieving simple and convenient operation.

Abstract: A driving tool includes a tool stem having a non-circular spatial engaging member and having one or more flat surfaces, a tool shank having a non-circular socket opening and having one or more curved surfaces for pivotally receiving the spatial engaging member of the tool stem and for allowing the tool shank to be selectively tilted relative to a longitudinal axis of the tool stem. A control ferrule is slidably engaged onto the tool shank and slidable and engageable onto the tool stem for retaining the tool shank in line with the longitudinal axis of the tool stem and for preventing the tool shank from being tilted relative to the tool stem to other angular position.