Abstract: The present invention relates to a torque socket, which comprises a shaft rod and a shaft cylinder. Two ends of the shaft rod are respectively axially formed with an insertion tenon and a core shaft having at least a cut groove transversally on a surface. Two axial ends of the shaft cylinder are respectively formed with a shaft slot and a sleeve slot, wherein the shaft slot allows the core shaft to be inserted therein and is formed with a buckle part corresponding to the location of the flange part; the interior of the shaft slot is radially and protrudingly formed with a friction segment for tightening the core shaft, thereby forming a preset torque value between the core shaft and the shaft slot. When the socket is used to fasten a connection unit, if the preset torque of the socket is exceeded, an idle rotation state is formed.

Abstract: A tool holder for use with a power tool includes an input shaft with a rear portion couplable to a power tool, and an output shaft with a front portion couplable to a tool bit. A clutch assembly releasably non-rotationally couples a front portion of the input shaft to a rear portion of the output shaft, and includes a recess in the front portion of the input shaft or the rear portion of the output shaft, an aperture in the other of the front portion of the input shaft or the rear portion of the output shaft, a roller received in the aperture, and a spring that biases the roller radially inwardly toward the recess. The spring enables release of the roller radially outwardly from the recess when a predetermined torque threshold is exceeded, such that torque is not transmitted from the input shaft to the output shaft.

Abstract: A socket wrench includes a handle having a housing and a grip portion, a drive shank having a ratchet wheel mounted in the housing, two pawl members engaged with the ratchet wheel, a switching member located between the pawl members, two elastic members each biased between the housing and the respective pawl member, a control knob connected with the switching member, a driven arm having a mounting sleeve and an arcuate mounting slot, a connecting plate provided on the handle, and two driving arms provided on the connecting plate and received in the mounting slot. When in use, one of the driving arms drives the driven arm by a leverage to drive the drive shank to rotate a socket so as to operate a workpiece in an energy-saving manner.

Abstract: A torque-limiting device may include a shaft extending axially through upper and lower shanks and a spring to connect to a nut. The upper and lower shanks may be under a force from the spring and further configured to selectively engage within a predetermined torque limit and disengage at above the predetermined torque limit. Accordingly, the shaft may receive torque up to the predetermined limit as provided by a user operating a handle of the torque-limiting device. The torque-limiting device may be disposable, reusable, economical, and have high torque capabilities. The shaft may include a lumen extending there through, and through which a variety of devices and materials may be delivered to a workpiece.

Abstract: The screwdriving power tool includes a hollow spindle (8) rotatably supported in the tool housing (4) and driven by a motor (26), a clutch (30) that rotatably connects and disconnects the hollow spindle (8) with and from the motor (26), respectively, in engagement and disengagement positions of the clutch (30), a screwing-in spindle (6) connected with a chuck (10) for a working tool (12) and connected with the hollow spindle (8) for a joint rotation therewith and for an axial displacement relative thereto, and a percussion mechanism (14) for applying a pulsed axial force to the screwing-in spindle (6), with the clutch (30) being brought into its engagement position by the screwing-in spindle (6) by being displaced against a biasing force of the clutch springs (40, 44), and being locked in its engagement position.

Abstract: A torque application device according to aspects of the present invention comprises (1) a collar for engaging a fastener, (2) a grip coupled to the collar, the grip preferably configured to magnify torque applied to it and to transfer all or part of the magnified torque to the collar, and (3) a slip mechanism to help avoid applying more than a predetermined, maximum amount of torque. The device may further include an indicator (such as a visual, audible and/or tactile indicator) to indicate when a predetermined maximum torque has been reached.

Abstract: A ratchet tool, including a shaft defining a longitudinal axis; a handle coaxial to the shaft; a first gear immovably fixed to the shaft and disposed in the handle; a second gear rotatably and longitudinally movable with respect to the shaft, where the second gear engages the first gear to limit torque transfer from the handle to the shaft in a first direction and provides substantially zero torque transfer in a second direction; a first spring disposed between the second gear and the handle; a third gear rotatably and longitudinally movable with respect to the shaft, where the third gear engages the first gear to limit torque transfer from the handle to the shaft in the second direction and provides substantially zero torque transfer in the first direction; and a second spring disposed between the third gear and the handle.

Abstract: A torque control wrench for both a left-hand thread and a right-hand thread is disclosed. The torque control wrench includes a wrench unit having a transmission unit, a movable shaft engaged with the transmission unit, for rotating the transmission unit with external force, and a socket for receiving rotational force at a rotation speed changed by the transmission unit and tightening or loosening a bolt with the received rotational force, a handle for generating the rotational force with which the socket tightens or loosens the bolt, and a torque controller between the wrench unit and the handle, for controlling a torque applied from the handle to the socket, including a clutch for rotating along with rotation of the handle and thus rotating the movable shaft and, if a torque equal to or greater than a preset torque value is applied, rotating idly, and a clutch torque controller for controlling the torque applied from the handle to the clutch.

Abstract: A screwdriver includes a handle, a shaft, a torque-transmitting unit and a torque-adjusting unit. The shaft is partially inserted in the handle. The torque-transmitting unit is located in the handle and operable to transmit an adjustable maximum value of torque to the shaft from the handle. The torque-adjusting unit is partially located in the handle, connected to the torque-transmitting unit, and operable to adjust the adjustable maximum value of torque.

Abstract: An adjustable torque limiting device includes a shank unit composed of first and second shanks coaxially and rotatably connected to each other, a carrier unit mounted between the shanks and having axially facing bearing regions and radially facing detent regions which cooperatively define cavities for receiving detent bodies, respectively, so as to transmit a straining force emanating from the detent regions to the detent bodies, a force transmitting member movably mounted on the shank unit and frictionally engaged with the detent bodies, an adjusting assembly turnable to axially move the force-counteracting member, and a compressible biasing member disposed between the force-counteracting member and the adjusting assembly to exert a preloaded force against the straining force.

Abstract: An anti-slip wrench includes a handle having two opposite grip surfaces, and at least one slant slot formed on at least one of the grip surfaces of the handle. The slant slot is through the grip surface from one lateral surface of the handle to the other. The slant slot is a concave surface with two side edges, which meet the grip surface respectively. The slant slot is positioned at an included angle located between a slot axis of the slant slot and a longitudinal axis of the handle. The concave surface of the slant slot accommodates a thumb of a user when gripping the handle. The slant slot on the handle is provided to prevent the thumb from sliding longitudinally and transversely when gripping the handle.

Abstract: A wrench with a quick rotatable driving head includes a handle, a driving head and a quick-disengaging unit. The quick-disengaging unit is composed of a fixing member secured with the driving head, an operating member inserted through the handle and fitted around the fixing member, and a restraining element transversely provided between the fixing member and the operating member and the handle. The handle and the driving head can be separated by the quick-disengaging unit so that the driving head, with the quick-disengaging unit acting as a pivot, can quickly screw or unscrew a thread locking member, and the operating member can be restrictedly positioned on the fixing member by the restraining element, able to prevent the handle and the driving head from separating.

Abstract: A surgical device can include a torque limiting device or system. The surgical device can include a rod attached on one end to a rotatable handle and attached on the opposite end to a surgical implement. A first torque limiting element can be connected to the handle, and a second torque limiting element can be operably connected to the rod and surgical implement and releasably engageable with the first torque limiting element. When the first and second torque limiting elements are engaged, rotation of the handle can cause rotation of the rod and surgical implement. When a rotational force that exceeds a predetermined torque limit is applied to the handle, the first torque limiting element can disengage from the second torque limiting element, so that the handle is rotatable without rotation of the rod and surgical implement. The first and second torque limiting elements can be re-engageable so that further rotation of the handle can cause rotation of the rod and surgical implement.

Abstract: A torque-limiting driving tool having a body having an axis of rotation, an elongated shaft disposed along the axis of rotation and supported by the body, and a torque-limiting element disposed to limit the amount of torque imposed on the body which is transmitted to the elongated shaft. The torque-limiting element includes opposed cams each of which comprises a metallic cam surface and a non-metallic structural base which is disposed to hold the metallic cam surface in operable position within the body. The torque-limiting driver may have a torque-adjustment element which is operable to adjust the torque value to which the transmitted torque is limited, which may include a plug bearing threads which are compatible with threads of the body. The body may include a locking element which drivably interacts with the plug to resist spontaneous rotation of the plug.

Abstract: A hand tool torsion adjustment structure includes a main mechanism, a torsion release mechanism and a micro-adjustment mechanism. The main mechanism is composed of a working rod and a tool handle while the torsion release mechanism is provided with a first engage tooth, a second engage tooth and a spring, and the micro-adjustment mechanism consists of a resisting member, an interacting member and at least one adjusting pinion. The torsion value of the hand tool can quickly be adjusted through the main mechanism and the torsion release mechanism, and the torsion preset value of the hand tool can precisely be fine-adjusted via the micro-adjustment mechanism.

Abstract: A torque adjustable sleeve assembly includes a first part with first teeth in the first end thereof and a second part has one end inserted into the first end of the first part. The second part includes second teeth which are engaged with the first teeth. A rod passes through the first and second parts and two springs are mounted to the rod and located in the two parts respectively. A movable member is threadedly connected to an end of the rod and adjusts the compression of the two springs to adjust an engaging force between the first and second teeth. The second part includes a driving hole to be connected with a tool bit or screw unit. The second part is made of plastic material so as to protect the tool bit or the screw unit to be tightened or loosened.

Abstract: A screwdriver includes a handle, a shaft, a torque-transmitting unit and a torque-adjusting unit. The shaft is partially inserted in the handle. The torque-transmitting unit is located in the handle and operable to transmit an adjustable maximum value of torque to the shaft from the handle. The torque-adjusting unit is partially located in the handle, connected to the torque-transmitting unit, and operable to adjust the adjustable maximum value of torque.

Abstract: A hand tool for adjusting torsion includes a cap. A spindle assembly is fixed to the cap. A tubular adjusting seat is sleeved on the spindle assembly. The adjusting seat has a sliding groove axially spirally defined in an outer periphery thereof. At least one ball is slidably received in the sliding groove and being movable along the sliding groove. A first handle is sleeved on the adjusting seat. The first handle has a torsion spring received therein, a first teethed seat connected to the torsion spring, and a second teethed seat engaged with the first teethed seat. A sliding sleeve is sleeved on the first handle. The sliding sleeve has at least one reset slot annularly defined in an inner periphery thereof for corresponding to the at least one fixing hole. A second handle is abutted against the second teethed seat. A driving rod assembly is fixed to the second handle.

Abstract: A torque socket assembly includes a base which has a receiving hole defined therein. A tube sleeves on the base. The tube has a first portion and a second portion. The first portion has a recess defined in an outer periphery thereof. The first portion partially sleeves on an outer periphery of the base. A torque setting unit includes a first teethed gear disposed in the receiving hole, a second teethed gear meshed with the first teethed gear, a resilient unit abuts against the second teethed gear and the second portion, and a rod passes through the tube. The second teethed gear has an indentation formed on an outer surface thereof. A securing unit includes a pin disposed in the recess. A spring sleeves on the first portion of the tube and contacts with the pin, and an outer sleeve sleeves on outer peripheries of the spring and the tube.

Abstract: A torque socket assembly includes a first connecting portion which has a positioning hole and a fitting hole respectively defined in two ends thereof. A second connecting portion which has a driving hole and a receiving hole respectively defined in two ends thereof. The fitting hole and the receiving hole respectively have a first and a second positioning block disposed therein. A first and a second gear teeth are respectively disposed on the first and the second positioning block and are meshed with each other. A through hole is penetrated through the first and the second connecting portion, and the positioning blocks. A torque setting unit includes a resilient piece, a rod, and a screwing nut. The rod is inserted through the through hole, and the screwing nut is fastened to a second end of the rod for setting a stable torque value to the torque socket assembly.

Abstract: A ratcheting assembly for a tool comprising a housing, a gear supported by a hollow shaft located in the housing and a pawl to engage the gear. A ring in contact with the housing allows adjustment of the ratcheting assembly. The assembly can the releasably lock the tool within the ratcheting assembly by way of a locking mechanism located within the shaft. The assembly further has a compressible collar that will be used to release the tool from the ratcheting assembly.

Abstract: A torque application device according to the present invention comprises a collar for engaging a fastener, a grip coupled to the collar such that a predetermined maximum torque can be applied to the collar to tighten the fastener, and a slip mechanism to prevent the likelihood that the maximum torque is exceeded. The device may further include an indicator (such as a visual, audible and/or tactile indicator) to indicate that the predetermined maximum torque has been applied.

Abstract: A lockable torque-limiting driver includes a body and a sleeve received in a sleeve chamber of the body and secured therein by recesses inside the body. The sleeve is provided with projecting edges on the outer wall to be respectively fitted in the recesses of the body, plural recessed grooves at the inner wall for fixing an upper cam, and female threads at the inner wall to be screwed with the male threads of a torque-limiting member, further disposed with plural positioning serrations at topside and a center chamber inside. The upper cam and a lower cam respectively have one-way serrations to be mutually engaged. The torque-limiting member is fixed with positioning projections to be actuated to move on the positioning serrations of the sleeve and give out sounds by which a user can know a torque limiting extent desired.

Abstract: A torque-limiting and ratcheting driver. The drive comprises a handle having an enclosed end and an open end, which houses a drive assembly. The drive assembly comprises a drive shaft, a drive clutch member and a camming clutch member supported by the drive shaft. The camming clutch member is coupled to the drive shaft, and the first drive clutch member and second camming clutch member are biased towards one another. The drive assembly has a locking screw supported by the drive shaft, with the locking means located at the enclosed end of the handle. The drive assembly is secured with the housing. The driver also comprises a ratcheting assembly connected to the handle, independently assembled of the drive assembly.

Abstract: A hand tool for adjusting torsion includes a cap. A spindle assembly is fixed to the cap. A tubular adjusting seat is sleeved on the spindle assembly. The adjusting seat has a sliding groove axially spirally defined in an outer periphery thereof. At least one ball is slidably received in the sliding groove and being movable along the sliding groove. A first handle is sleeved on the adjusting seat. The first handle has a torsion spring received therein, a first teethed seat connected to the torsion spring, and a second teethed seat engaged with the first teethed seat. A sliding sleeve is sleeved on the first handle. The sliding sleeve has at least one reset slot annularly defined in an inner periphery thereof for corresponding to the at least one fixing hole. A second handle is abutted against the second teethed seat. A driving rod assembly is fixed to the second handle.

Abstract: A torque application device according to aspects of the present invention comprises (1) a collar for engaging a fastener, (2) a grip coupled to the collar, the grip preferably configured to magnify torque applied to it and to transfer all or part of the magnified torque to the collar, and (3) a slip mechanism to help avoid applying more than a predetermined, maximum amount of torque. The device may further include an indicator (such as a visual, audible and/or tactile indicator) to indicate when a predetermined maximum torque has been reached.

Abstract: A stabilizing mechanism for output torque of a transmission member, including: a transmission member having a force-input section and a force-output section which are separated from each other; an engaging member positioned between the force-input section and the force-output section, the engaging member including a first engaging section and a second engaging section respectively disposed on the force-input section and the force-output section in predetermined positions, the first and second engaging sections being engaged with each other by a predetermined engagement depth for transmitting force from the force-input section to the force-output section; and a resilient member for providing resilient force to keep the first and second engaging sections engaged with each other. The resilient member is compressible under force. The resilient member has a compressible distance shorter than the engagement depth of the first and second engaging sections.

Abstract: A torque socket assembly includes a base which has a receiving hole defined therein. A tube sleeves on the base. The tube has a first portion and a second portion. The first portion has a recess defined in an outer periphery thereof. The first portion partially sleeves on an outer periphery of the base. A torque setting unit includes a first teethed gear disposed in the receiving hole, a second teethed gear meshed with the first teethed gear, a resilient unit abuts against the second teethed gear and the second portion, and a rod passes through the tube. The second teethed gear has an indentation formed on an outer surface thereof. A securing unit includes a pin disposed in the recess. A spring sleeves on the first portion of the tube and contacts with the pin, and an outer sleeve sleeves on outer peripheries of the spring and the tube.

Abstract: A torque-limiting driver has a handle, a body, a torque-limiting assembly and a work-piece engaging tip. The torque-limiting assembly includes an upper and lower shank that have a plurality of teeth circumferentially spaced. The teeth have a vertical face, an inclined face and a flat peak. The inclined face is defined by a radius of curvature that transitions to the flat peak. There is a spring for applying pressure across the upper and lower shank. The teeth engage for relative rotation when the handle is turned and disengage when a predetermined value of torque is exceeded.

Abstract: A torque socket assembly includes a first connecting portion which has a positioning hole and a fitting hole respectively defined in two ends thereof. A second connecting portion which has a driving hole and a receiving hole respectively defined in two ends thereof. The fitting hole and the receiving hole respectively have a first and a second positioning block disposed therein. A first and a second gear teeth are respectively disposed on the first and the second positioning block and are meshed with each other. A through hole is penetrated through the first and the second connecting portion, and the positioning blocks. A torque setting unit includes a resilient piece, a rod, and a screwing nut.

Abstract: A torque adjustable sleeve assembly includes a first part with first teeth in the first end thereof and a second part has one end inserted into the first end of the first part. The second part includes second teeth which are engaged with the first teeth. A rod passes through the first and second parts and two springs are mounted to the rod and located in the two parts respectively. A movable member is threadedly connected to an end of the rod and adjusts the compression of the two springs to adjust an engaging force between the first and second teeth. The second part includes a driving hole to be connected with a tool bit or screw unit. The second part is made of plastic material so as to protect the tool bit or the screw unit to be tightened or loosened.

Abstract: It is an object of the invention to provide an effective technique for preventing loss of a screw fastening depth regulating member removed from a machine body in a screw fastening machine. A representative screw fastening machine includes a machine body, a motor, an input shaft, an output shaft, a first clutch element, a second clutch element, a biasing member for first and second clutch elements, a screw fastening depth regulating member. The machine body has a holding part formed in an area other than the tip end region of the machine body to removably hold the screw fastening depth regulating member. The holding part is provided such that the screw fastening depth regulating member can be attached to and removed from the holding part by utilizing elastic deformation of the holding part.

Abstract: A torque-limiting driver has a handle, a body, a torque-limiting assembly and a work-piece engaging tip. The torque-limiting assembly includes an upper and lower shank that have a plurality of teeth circumferentially spaced. The teeth have a vertical face, an inclined face and a flat peak. The inclined face is defined by a radius of curvature that transitions to the flat peak. There is a spring for applying pressure across the upper and lower shank. The teeth engage for relative rotation when the handle is turned and disengage when a predetermined value of torque is exceeded.

Abstract: A lockable torque-limiting driver that includes, a body, a sleeve, a shaft carried by the body for rotation relative thereto and having a fastener-engaging tip at one end that projects from the body, a torque-limiting mechanism coupled to the shaft and housed within said body, a torque-adjusting mechanism within the body and coupled to the torque-limiting mechanism for adjusting the torque-limiting mechanism to a desired torque value, a torque-locking mechanism operably coupled with the torque-adjusting mechanism and the body or the sleeve for preventing movement of the torque-determining means and locking the settable torque-limiting driver at the desired torque value.

Abstract: A torque-limiting driver. The driver comprises a handle having a housing, a drive assembly located the housing. The drive assembly comprises a drive, a drive clutch member supported by the drive shaft and secured to the housing, a camming clutch member supported by the drive shaft and interacting with and biased against the drive clutch member. The camming clutch member is coupled to the drive shaft. The housing has a first open end and a second open end. The drive assembly is locked or secured together at the first open end, and the drive assembly is connected to a tool at the second opening.

Abstract: A torque wrench includes an operation bar having a mounting sleeve, a hollow handle having an inner wall provided with a first toothed portion and a plurality of positioning grooves, and an adjusting unit including an adjusting knob movable relative the handle and having an outer wall provided with a second toothed portion detachably engaged with the first toothed portion of the handle and a positioning block detachably locked in one of the positioning grooves of the handle. Thus, the adjusting knob is initially pulled outwardly relative to the mounting sleeve and the linking rod and is then rotatable relative to the handle so as to adjust the torque values of the torque wrench.

Abstract: A torque-limiting driver has a handle, a body, a torque-limiting assembly and a work-piece engaging tip. The torque-limiting assembly includes an upper and lower shank that have a plurality of teeth circumferentially spaced. The teeth have a vertical face, and inclined face and a flat peak. The inclined face is defined by a radius of curvature that transitions to the flat peak. There is a spring for applying pressure across the upper and lower shank. The teeth engage for relative rotation when the handle is turned and disengage when a predetermined value of torque is exceeded.

Abstract: A multiple bit device for an automatic drill or screwdriver includes a plurality of bits of different size and functionality, in one compact unit. The multiple bit unit provides a convenient and handy arrangement of bits which allows the user to easily switch to different bits. Additionally, since all of the bits are in one unit, misplacement is less likely, as is with single bit units. Optionally, at least one extender unit which fits over any one of the bits in the multiple bit unit, and supports an additional bit piece may be included.

Abstract: It is an object of the present invention to provide a technique for appropriately providing not only for normal rotation but for reverse rotation in a tightening tool having a clutch. Representative tightening tool according to the invention comprises a body, a driving motor housed in the body, a driving-side clutch element, an auxiliary clutch element, a driven-side clutch element, a driven shaft and a tool bit. During normal rotation of the driving motor, the driven-side clutch element is caused to move in the axial direction by application of a pressing force of the user to the body to engage with the driving-side clutch element. During reverse rotation of the driving motor, the driving-side clutch element and the auxiliary clutch element are caused to move relatively with respect to each other in the axial direction by rotating torque of the driving-side clutch element and the driving-side clutch element or the auxiliary clutch element engages with the driven-side clutch element.

Abstract: A lockable torque-limiting driver that includes, a body, a sleeve, a shaft carried by the body for rotation relative thereto and having a fastener-engaging tip at one end that projects from the body, a torque-limiting mechanism coupled to the shaft and housed within said body, a torque-adjusting mechanism within the body and coupled to the torque-limiting mechanism for adjusting the torque-limiting mechanism to a desired torque value, a torque-locking mechanism operably coupled with the torque-adjusting mechanism and the body or the sleeve for preventing movement of the torque-determining means and locking the settable torque-limiting driver at the desired torque value.

Abstract: A torque adaptor includes a body, a driving portion that rotates with respect to the body when a threshold torque is exceeded, a receiving portion engageable with a workpiece, and a gear plate that drives the receiving portion. The gear plate is driven by the driving portion, the driving engagement between the driving portion and the gear plate being released when a torque required to drive the gear plate exceeds the threshold torque. An adjusting member adjusts the force of engagement between the driving portion and the gear plate so as to adjust the threshold torque. The receiving portion is moveable along a longitudinal direction of the body between a first position in which the receiving portion engages the body such that a rotation of the driving portion rotates the receiving portion and the rotatable workpiece and a second position in which the receiving portion is disengaged from the body.

Abstract: The present invention relates to a digital power torque wrench of indirect transmission, which is composed of an eccentric driving module, a sensing module, a ratchet module and a control module. The eccentric driving module is used for transmitting power to the sensing module and the ratchet module for driving the ratchet module rotate accordingly and thus transferring the momentum of the rotating to fasten a workpiece, such as a bolt or nut. The sensing module is capable of detecting the deformation of the ratchet module as it is rotating against an increasing resistance during the fastening process, and converting the detected deformation into a signal to be received by the control module. The control module is capable of quantifying the signal for converting the same into a numerical signal representing a torque detected by the sensing module and then sending the numerical signal to a display device for displaying.

Abstract: The invention is an improved ratchet to drive sockets for the purpose of tightening or loosening threaded fastener. The invention contains an electric motor, battery and worm gear system to drive the sockets. The battery and motor are contained within the handle of the invention and are thus limited in size and power. A switch is also located on the handle and is used to activate the motor in the desired direction. The motor is powerful enough to drive most fasteners when the fasteners are somewhat loose, and as such the invention can drive the loose fasteners rapidly. At such times when the fasteners are snug or tight the invention will perform as a conventional ratchet. As the handle is pulled the worm and pion gears will lock and transmit the torque to the socket. As the handle is released the motor will drive the worm and spin the pion gear/socket and take up all of the slack.

Abstract: This invention is about a device used for installing a fixing nut on the targeted objects-multiple fixing screw axes protruded from the hub or for separating them from the targeted object or the fixing screw axis in order to fix vehicle's tire wheel to the hub when installing or separating a fixing nut from targeted objects. Based on the idle operation of the operating gear, not based on the visual examination, the invention immediately recognizes the complete installation of a fixing nut. Likewise, this invention is to provide a wrench that maximizes user convenience.

Abstract: A lockable torque-limiting driver that includes, a body, a sleeve, a shaft carried by the body for rotation relative thereto and having a fastener-engaging tip at one end that projects from the body, a torque-limiting mechanism coupled to the shaft and housed within said body, a torque-adjusting mechanism within the body and coupled to the torque-limiting mechanism for adjusting the torque-limiting mechanism to a desired torque value, a torque-locking mechanism operably coupled with the torque-adjusting mechanism and the body or the sleeve for preventing movement of the torque-determining means and locking the settable torque-limiting driver at the desired torque value.

Abstract: A torque adjustable screwdriver having a torque indicator comprises a holding portion including a handle, a spring and a stopper which are received in the handle. An operation unit has a ratchet unit, a rotary rod, an exposed post, and a screwdriver head. The rotary rod is installed within the handle and passes through the spring and the stopper. The ratchet unit has an approximate cylinder shape and one end surface of the ratchet unit is formed as a sawteeth surface. In assembly, the rotary rod is engaged to the teeth of the enlarged end of the rotary rod. A setting unit includes a driving rod, a rotary unit, a resisting unit, and an adjusting cover. The rotary unit is a hollow cylinder with outer threads at one end. An inner side of the rotary unit has the outer threads being formed with teeth.

Abstract: A socket includes a body having a driving portion, a receiving portion engageable with a rotatable workpiece, a first gear portion capable of being operatively driven by rotation of the driving portion in a fastening direction and an opposite releasing direction, a second gear portion functionally cooperable to drive the receiving portion for rotating the workpiece, the second gear portion being constructed and arranged to engage with and be driven by the first gear portion. The driving engagement between the first gear portion and the second gear portion is released when a torque required to drive the second gear portion exceeds the threshold amount of torque. A biasing member applies a force of engagement between the first gear portion and the second gear portion, and an adjusting member functionally cooperable with the biasing member adjusts a magnitude of the force of engagement to adjust the threshold amount of torque.

Abstract: A torque wrench is disclosed that includes a drive head that defines a torque transfer axis and that is adapted to transfer torque to a workpiece. The torque wrench includes a tubular handle that is operative, upon rotation relative to a lever, to increase the bias on a spring upon lengthening a distance between the drive head and the opposite end of the handle, and to decrease the bias on the spring upon shortening the distance thereby setting the predetermined operating force.

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 power tool has a clutch, a motor, a drive shaft located at a side of the motor, a driven shaft to be located at a side of a workpiece, a clutch which couples the drive shaft and the driven shaft and enters into engagement when pressure is exerted on the driven shaft, and the clutch is provided with a clutch engagement aid.