Abstract: To make improvements in torque wrenches with a torque limiter that uses a cam mechanism and to provide a torque wrench that realizes more stable operation and is capable of highly precise tightening. In a torque wrench with a torque limiter that uses a cam mechanism, a solid columnar roller member 14 is engaged with a cam part 7 of a cam shaft 8 such that it is rotatably supported by a roller support lever member 12 mounted in a head portion 2 such as to be rotatable around a support shaft 16 and such that it is pressed against the cam part 7 by a spring force transmitting rod 18 biased by a torque setting spring. The roller support lever member 12 is configured such that the distance r2 from the support shaft 16 to a point of application of force of the spring force transmitting rod 18 is longer than the distance r1 from the support shaft 16 to the roller member 14.

Abstract: A double-fulcrum torque wrench including a tubular body, a head section for fitting with a socket or a screwing member and a flexible mechanism including a flexible section. The flexible mechanism is connected with a rear end of the head section and disposed in the tubular body. The head section protrudes from a front end of the tubular body. When a wrenching force is applied to the wrench, the flexible section of the flexible mechanism is flexible. The head section and the flexible mechanism are connected with the tubular body via two fulcrums and the flexible section is positioned between the two fulcrums. By means of the double-fulcrum design, the action force at the force application end of the wrench is equal to the action force at the resistance end. In addition, the flexure of the wrench and the actual wrenching torque applied to the wrench can be more accurately and sensitively measured.

Abstract: In a preferred embodiment, a driver socket is configured to provide a visual indicator on a portion of a locknut upon application of a predetermined torque to the driver socket relative to the locknut. The driver socket has a member which is positioned proximate to the first end, with a portion thereof protruding into an aperture of the driver socket. The member is configured to engage a drive configuration of a locknut in order to apply nut torque to the locknut upon rotation of the drive socket and to form a mark on the drive configuration of the locknut in order to provide a visual indicator on the locknut that the locknut has been subjected to the desired torque during initial assembly. The driver socket is preferably attached to a ratchet arm of a fastening tool which provides a mechanical advantage in applying the desired torque.

Abstract: A torque tool for measuring and/or cut-off tightening of a torque on a workpiece. The torque tool is provided within a housing with a handle. The torque to be measured is transmitted with a rod. A measuring element electronically detects the actual torque. A measure- and control electronics for processing the torque detected in such a way. The electronic measure and control electronics controls a cut-off switch for cutting-off the torque tool.

Abstract: The present invention relates to a handle, a head piece and a wrench, such as a torque wrench, in particular for use in surgery and prosthetics, such as surgery and prosthetics within the dental field. A handle for a wrench is provided, wherein the handle comprises an elongated body element extending along a first axis, and a torque arm for indicating the torque applied to the torque arm, the torque arm having a proximal end attached to the body element. Furthermore, the handle comprises a first locking element, the first locking element being adapted to removably engage with a locking element of a head piece, and the handle further comprises a ratchet element that is adapted to engage with a tool piece in a ratchet gear.

Abstract: A power tool includes an electric motor including a rotor and a stator, a torque sensor for measuring the torque value during tightening of rotatable fastening elements, and an operation control unit, integrated in or in communication with the power tool. The power tool has a device for preventing rotation of the rotor. A method for tightening rotatable fastening elements by use of the power tool is also disclosed.

Abstract: A torque wrench includes a main beam having a distal end and a proximal end, a drive element disposed at the distal end of the main beam, a stationary beam having a distal end fixedly secured to the main beam at a first location on the main beam, and having a proximal end, and a displacement sensor assembly disposed at a second location associated with the main beam and with the stationary beam to detect an amount of displacement of the main beam relative to the stationary beam. The displacement sensor assembly includes an actuating element to produce a radiation signal and rigidly secured to one of the main beam or the stationary beam and an actuable element responsive to the radiation signal and rigidly secured to the other one of the main beam or the stationary beam.

Abstract: A screwdriving tool is provided, which includes a drive shaft; an angle head having an output shaft whose axis of rotation is approximately orthogonal to the axis of the drive shaft; a transmission connecting the drive shaft to the output shaft; and at least one torque sensor built into the output shaft. The tool transmission includes at least one intermediate gear whose axis is appropriately parallel to the output shaft and which engages with a gear designed to turn the output shaft, and at least one bevel coupling connecting, directly or indirectly, the drive shaft to the intermediate gear or gears.

Abstract: Embodiments of the invention are related to tools for coupling leads to header assemblies for implantable medical devices, amongst other things. A wrench is configured so that if an axial force exceeding a first threshold is applied to a handle housing, then the housing handle will rotate with respect to a shaft. Other embodiments are also included herein.

Abstract: A double-fulcrum torque wrench including a tubular body, a head section for fitting with a socket or a screwing member and a flexible mechanism including a flexible section. The flexible mechanism is connected with a rear end of the head section and disposed in the tubular body. The head section protrudes from a front end of the tubular body. When a wrenching force is applied to the wrench, the flexible section of the flexible mechanism is flexible. The head section and the flexible mechanism are connected with the tubular body via two fulcrums and the flexible section is positioned between the two fulcrums. By means of the double-fulcrum design, the action force at the force application end of the wrench is equal to the action force at the resistance end. In addition, the flexure of the wrench and the actual wrenching torque applied to the wrench can be more accurately and sensitively measured.

Abstract: A rotatable handle arrangement for a torque-adjustable wrench including a hollow sleeve fixed at a distal end of the moment arm by a fixing element. An internal toothed portion is formed in a stepped hole of the hollow sleeve and positioned adjacent to one side of the in-place-rotatable handle. In the normal state, the internal toothed portion is engaged with an external toothed portion of the in-place-rotatable handle by means of an elastic element. The torque-adjustable rod of a torque adjusting mechanism is driven by the in-place-rotatable handle for adjusting the torque value when the in-place-rotatable handle is pushed in the direction of the hollow sleeve so as to disengage the internal and external toothed portions from each other. In this way, an expected adjustment is achieved.

Abstract: A wrench with electronic torque display unit includes a torque adjustment mechanism which includes a sleeve, two gears, a rod and a movable tube, and a locking mechanism which includes a positioning cap, wherein the value of the torque to be output can be set by operating the adjustment mechanism by rotating the positioning cap. The pre-set value is displayed on the display screen so as to provide a wrench with convenient operation and precise feature.

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: An electronic torque wrench includes a tubular housing having a receiving space, a working unit having an abutment portion extending into the receiving space, a strain sensor provided in the working unit, and a trip unit disposed in the receiving space and including a cylinder having a chamber containing hydraulic fluid, a trip element disposed movably between the abutment portion and the cylinder and having a seat portion, and a control element connected to the cylinder for pressurizing or depressurizing the hydraulic fluid so as to permit the abutment portion to be seated on or to move away from a center of the seat portion. A central processor is connected electrically to the strain sensor and the control element, and controls the control element to depressurize the hydraulic fluid when an applied torque measured by the strain sensor is larger than a preset reference torque value.

Abstract: A torque device for use in tools comprises a tubular member; a bit receiver axially received at the front end of the tubular member and its front end may couple with tools; a shank inserted at the rear end of the tubular member and including a resilient element fitted thereon, and including a receiving chamber formed at the rear end thereof for receiving a driving tool, and a selector mechanism defined between the shank and the bit receiver; a fitting sleeve fitted on the shank for biasing against the resilient element and including inner threads arranged on the inner wall thereof, between the fitting sleeve and the tubular member being provided with a guiding mechanism; an adjusting member fitted at the rear end of the shank including outer threads for screwing with the inner threads of the fitting sleeve, and between the adjusting member and the tubular member being fixed a confining mechanism.

Abstract: A tool is provided for driving fasteners that includes a torque limiting mechanism therein. The torque limiting mechanism includes a first frictional engagement member disposed on the drive shaft for the tool that is engaged by one or more second frictional engagement members disposed on one or more sides of the first frictional member. The second frictional engagement members are biased into engagement with the first member by biasing members disposed within the handle that can be adjusted in order to provide more or less of a biasing force to control the frictional engagement of the second member with the first member and thereby control the torque limiting function of the torque limiting mechanism. In addition, a drive shaft is also engaged with a ratcheting mechanism that enables the tool to drive a fastener into a suitable substrate in only a single direction.

Abstract: A twisting spanner with an auto positioning assembly comprises a push post; a hollow cylinder; and a periphery of the supporting seat having a cover; and a spring; one end of the spring having a supporting seat; and at least one end of the supporting seat having a positioning body. The positioning body is integrally formed with the supporting seat. The positioning body is a ball. The supporting seat has a positioning hole facing to the positioning groove. The cover is made of soft material. The cover is made of copper. The supporting seat has a limiting post capable of being inserted in to the spring. The supporting seat has a receiving hole receiving with at least one roller.

Abstract: A torque wrench for a golf club includes a body and a handle. The body has a notch formed therein with an interface for engaging a geometrically-shaped head of a mechanical fastener. The handle includes a free end and an attached end, the latter of which is pivotably connected to the body by a hinge. The handle is movable between a stowed position and a deployed position. When the handle is in the stowed position, the free end of the handle abuts the body and the torque wrench has a generally disc-like shape.

Abstract: An electronic torque wrench for driving a workpiece includes a wrench body having a handle end and a wrench head receiving end. A wrench head a workpiece receiving end and a mounting end, and the mounting end is removably received by wrench head receiving end. A user interface having a processor and a display is mounted on the wrench body. A wrench head sensing device is carried by the wrench head receiving end and includes an electrical connection between the wrench head sensing device and the processor. The wrench head sensing device sends an electrical signal to the processor indicating the presence of the wrench head on the wrench head receiving end.

Abstract: A clutch assembly for use with a torque limiting driver. The clutch assembly comprises two relatively roatable clutch plates, a driving plate and a camming plate, that face one another, with a plurality of rolling members housed between the two members. When the rolling members are in the override position, the recesses form individual housings for the rolling members that include a gap located between the rolling members and a respective curvilinear base area of the drive plate. The clutch assembly is secured to a drive shaft by a pin, which is supported by a pair of wheels located on opposing sides of the pin.

Abstract: A tool is provided for driving fasteners that includes a torque limiting mechanism therein. The torque limiting mechanism includes a first frictional engagement member disposed on the drive shaft for the tool that is engaged by one or more second frictional engagement members disposed on one or more sides of the first frictional member. The second frictional engagement members are biased into engagement with the first member by biasing members disposed within the handle that can be adjusted in order to provide more or less of a biasing force to control the frictional engagement of the second member with the first member and thereby control the torque limiting function of the torque limiting mechanism. In addition, a drive shaft is also engaged with a ratcheting mechanism that enables the tool to drive a fastener into a suitable substrate in only a single direction.

Abstract: A digital beam-type torque wrench has a main beam and a stationary beam having a distal end thereof fixedly attached at or near a distal end of the main beam. A sensing assembly is disposed generally at a proximal end of the main beam and includes a displacement sensing element carried by the proximal end of the stationary beam and a sensing element actuator disposed on said main beam. The sensing element actuator and sensing actuator cooperate to generate a variable output voltage, whose magnitude is proportional to the amount of flexure of the main beam upon application of torque upon a rotating element by the wrench. In one embodiment, the sensing assembly comprises a potentiometric rotary position sensor including an arcuate rack gear coupled to the main beam and engaged with a pinion gear coupled to the stationary beam, with rotation of the pinion gear in turn causing rotation of a potentiometer.

Abstract: The present invention relates to a torque connecting mechanism, which comprises a connecting rod with a continuous indicating part and a strength control part, the indicating part and strength control part are implemented at a location where torque strength or other stress is easy to be concentrated. The indicating part extends along the axis of the connecting rod. A stop part is implemented on the connecting rod, and strength indicating mechanisms are provided on both sides of the stop part, a lock ring is utilized to make a rotation handle stay securely around the connecting rod. The rotation handle has a base line for coinciding with a base point on the driving end of the connecting rod, which makes the base line of the rotation handle become another strength indicating mechanism of the stop part of the connecting rod. So it is easy to notice the condition of the deformation on the connecting rod whether the rotation handle is mounted on or detached from the connecting rod.

Abstract: A twisting spanner with an auto positioning assembly comprises a push post; a sound seat; and a periphery of the supporting seat having a buffer cover; and a spring; one end of the spring having a supporting seat; and at least one end of the supporting seat having a positioning body. The positioning body is integrally formed with the supporting seat. The positioning body is a ball. The supporting seat has a positioning hole facing to the positioning groove. The buffer cover is made of soft material. The buffer cover is made of copper. The supporting seat has a limiting post capable of being inserted into the spring. The supporting seat has a receiving hole receiving with at least one roller.

Abstract: A wrench includes a casing having a compartment, a rod rotatably received in the casing and having an end for coupling with a drive member for driving a fastener, an adjusting member mounted in the rod, and an elastic element for retaining the rod mounted between the adjusting member and the casing. When a rotational force applied to the casing is smaller than an engaging force between the casing and the elastic element, the rod turns together with the casing for tightening the fastener. When the rotational force applied to the casing is greater than the engaging force between the casing and the elastic element, the casing slides relative to the rod without turning the fastener. The adjusting member is adjustable in position relative to the casing to thereby change the engaging force between the casing and the elastic element.

Abstract: A clutch assembly for use with a torque limiting driver. The clutch assembly comprises two relatively rotatable clutch plates, a driving plate and a camming plate, that face one another, with a plurality of rolling members housed between the two members. The driving clutch member has a face comprising a plurality of radially spaced flat areas and a plurality of recesses interposed between the flat areas, with the recesses comprising a curvilinear base area. The second camming clutch member has a face comprising a plurality of radially spaced flat areas and a plurality of opposing downwardly sloped planar surfaces interposed between said flat areas, with the planar surfaces forming an angle. The rolling members are movable from an engaged position with the clutch members to an override position. When the rolling members are in the override position, the recesses form individual housings for the rolling members that include a gap located between the rolling members and a respective curvilinear base area.

Abstract: A screwdriver comprises a torque setting mechanism including a torque adjustment ring, an actuation rod threadedly secured to the upper torque adjustment ring and a lower torque adjustment nut, a spring biased sleeve with the actuation rod passed, and a clutch ring snugly put on two opposing intermediate flats of the actuation rod and having an upper surface engaged the torque adjustment ring and a lower surface formed with recesses engaged with steel balls on an upper surface of a support ring in the sleeve. Turning a rotatable handle will turn the sleeve. The clutch ring will disengage with the steel balls if the torque exceeds a set value. Thus, the torque exerted on the handle will not transmit to a shank secured to the actuation rod so as to prevent a screw from being over-driven by the shank.

Abstract: A spanner with an enhancing device for positioning electronic devices installed therein; a spanner having a holding portion; at least one end of the holding portion having a driving portion; each of the connection of the driving portion and the holding portion having a strain gauge; a receiving space before formed in the holding portion; an enhancing rib being installed in the receiving space; each of an upper side and lower side of the receiving space of the holding portion having an electric device; the two electric devices being placed at two sides of the enhancing rib; the electric devices being connected to the respective strain gauges for measuring changes of resistances of the of the strain gauges as forces are applied to the strain gauges so as to calculate the twisting forces and display the values of the twisting forces.

Abstract: An omnidirectional twisting tool comprises a handle; the handle being a hollow tube body; one end of the handle being opened; a strain gauge installed at a lower portion of the handle; the strain gauge including an integrating element and a connecting unit for connecting the integrating element and the driving portion; a driving head at a front end of the spanner body; a rotary unit at another end of the driving head; an annular groove being formed at a lateral wall of the rotary unit; the rotary unit being pivotally installed at one end of the handle so that the driving head can rotate through 360 degrees around an axis of the handle; a connecting rod extending from a lower end of the rotary unit; the connecting rod being received within the handle; and the connecting rod being connected to the connecting unit.

Abstract: An omnidirectional twisting tool comprises a handle; the handle being a hollow tube body; one end of the handle being opened; a strain gauge installed at a lower portion of the handle; the strain gauge including an integrating element and a connecting unit for connecting the integrating element and the driving portion; a driving head at a front end of the spanner body; a rotary unit at another end of the driving head; an annular groove being formed at a lateral wall of the rotary unit; the rotary unit being pivotally installed at one end of the handle so that the driving head can rotate through 360 degrees around an axis of the handle; a connecting rod extending from a lower end of the rotary unit; the connecting rod being received within the handle; and the connecting rod being connected to the connecting unit.

Abstract: A torque-controlling wrench includes a handle, a socket-driving unit installed on the handle and a torque-controlling device. The torque-controlling device includes a rod installed in the handle and connected to the socket-driving unit, a knob installed on the handle and a spring compressed between the rod and the knob so that the knob can be turned to adjust a force exerted on the rod by the spring. An intermediate mechanism includes a first roller connected to the rod, a frame connected to the spring, a wheel installed on the frame and engaged with the roller and a second roller installed on the frame and engaged with the wheel. The centers of the first and second rollers are located on a same side of a vertical line passing a center of the wheel.

Abstract: An omnidirectional twisting tool comprises a handle; the handle being a hollow tube body; one end of the handle being opened; a strain gauge installed at a lower portion of the handle; the strain gauge including an integrating element and a connecting unit for connecting the integrating element and the driving portion; by the connecting unit, a driving head at a front end of the spanner body; a rotary unit at another end of the driving head; an annular groove being formed at a lateral wall of the rotary unit; the rotary unit being pivotally installed at one end of the handle so that the driving head can rotate through 360 degrees around an axis of the handle; a connecting rod extending from a lower end of the rotary unit; the connecting rod being received within the handle; and the connecting rod being connected to the connecting unit.

Abstract: A cam assembly for a click-type torque wrench includes an elongated plunger body having opposed ends and having a deep cavity formed axially in one end and terminating at an end face disposed with intermediate the ends, the end face having a cam seat formed therein and extending laterally theracross and having opposed sloping side cam surfaces. A sleeve may be disposed about the cam plunger for sliding engagement within a tubular lever arm of the torque wrench. The cam seat cooperates with an end of the wrench pivot arm for trapping therebetween the wrench trip block.

Abstract: An omnidirectional twisting tool comprises a handle; the handle being a hollow tube body; one end of the handle being opened; a strain gauge installed at a lower portion of the handle; the strain gauge including an integrating element and a connecting unit for connecting the integrating element and the driving portion; a driving head at a front end of the spanner body; a rotary unit at another end of the driving head; an annular groove being formed at a lateral wall of the rotary unit; the rotary unit being pivotally installed at one end of the handle so that the driving head can rotate through 360 degrees around an axis of the handle; a connecting rod extending from a lower end of the rotary unit; the connecting rod being received within the handle; and the connecting rod being connected to the connecting unit.

Abstract: A torque wrench for preventing transmission of torque in excess of a threshold level to avoid damage to replaceable scaler tips and hand pieces of ultrasonic dental instruments. The torque wrench has a housing with a core seated therein, with a cam mechanism or spring engagement between the core and the housing, such that the core may remain stationary when the housing is rotated passed the threshold level of torque. The core has an axial bore to receive a connecting shaft of a scaler tip, such that a working end and a functional shank of the scaler tip are received in a chamber of the housing, with the housing acting as an isolation cage for the scaler tip.

Abstract: A torque wrench includes a driving shank received in a handle and having an intermediate portion pivotally attached to the handle with a pivot axle, and having two projections, a follower is slidably received in the handle and biased to engage with the driving shank by a spring biasing member, and two guiding members are fitted and retained between the driving shank and the handle and each includes a groove for slidably receiving the projections of the driving shank, and thus to stably guide the inner end of the driving shank to rotate and to move within the handle and to prevent the driving shank from being tilted or swung or vibrated relative to the handle. The grooves of the guiding members include a center of curvature located at the pivot axle of the driving shank and the handle.

Abstract: A torque indication device for a hand tool includes a handle with a processing unit connected thereto and a head having a driving member connected thereto is rotatably connected to the handle. The head has an insertion which is inserted into an axial recess of the handle. A first notch is defined in a distal end of the insertion. An intermediate member has a second notch defined in a first end thereof and a second end of the intermediate member is a flat surface. A bead is engaged with the first and second notches. A spring is received in the axial recess and a first sensor is clamped between a first end of the spring and the flat surface. A second sensor is clamped between a second end of the spring and an inside of the axial recess. The first and second sensors are electrically connected with the processing unit.

Abstract: A torque wrench has an elongated lever arm with working and distal ends, the lever arm carrying a wrench head at the working end, a selector mechanism at the distal end and a torque-responsive mechanism coupled to the selector mechanism for movement therewith among plural selectable positions respectively corresponding to preset torque values, the lever arm having a longitudinal axis and an outer surface spaced transversely from the axis no more than a maximum transverse distance, the selector mechanism including retaining mechanism disposed axially beyond the distal end of the lever arm and spaced transversely from the axis a distance greater than the maximum transverse distance for retaining the selector mechanism in a selected position.

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: Disclosed is a torque wrench comprising a signal generator including a spring biased against a trigger member, a sensor, and a disc biased between the spring and the sensor, a setting assembly including a cylindrical member for receiving the disc and the sensor, a cap, a knob through the cap to threadably couple to the cylindrical member, and a sliding pin inserted through a groove on a handle into the cylindrical member for coupling, and a numeric display mounted around the handle. A maximum torque of the wrench can be preset by rotating the knob and shown on the display. Also, an amount of torque being exerted by wrench can be shown on the display. The wrench may trip when the amount of torque has reached the preset maximum torque.

Abstract: A torque wrench including a wrench main body, a central push rod mounted in the main body and having an escape section, an adjustment handle adjustably fitted with one end of the main body and a restricting member locked on the central push rod. When adjusting the preset torque value, a user engages a toothed section of the central push rod in a toothed hole of the adjustment handle; the adjustment handle drives the central push rod to adjust the torque value of the torque wrench. The toothed section of the central push rod is then disengaged from the toothed hole of the adjustment handle. The escape section having a diameter smaller than the diameter of the toothed hole fits into the toothed hole so that the central push rod is free from the adjustment handle; as a result the torque value will not be unexpectedly changed.

Abstract: An electronic torque wrench has inner and outer telescoping housing portions and a battery tray assembly telescopically receivable in the inner housing portion and a bezel assembly receivable in an aperture in the outer housing portion and interconnected with the housing portions and the battery support assembly by a single fastener. The bezel assembly carries torque measuring circuitry including a microcontroller, and a four-key pad including arrow keys for incrementing and decrementing a preset torque level at any time, an on/zero key and a units key for toggling among plural different units of torque measurement. The preset torque level is displayed until torque is applied or a key is pressed and can be changed and displayed at anytime.

Abstract: A torque wrench is provided having body and a handle that is rotatably mounted to the body for adjusting the torque setting, and an axially movable sleeve operable to selectively lock the handle. The sleeve includes a rigid member and an elastomeric member, such as an O-ring, and the sleeve is configured to act against a locking ball held in a bore of the handle. The sleeve is selectively movable between two positions: (a) a locked position wherein the rigid member firmly retains the locking ball seated in one of several detents in the body, thereby preventing rotation of the handle; and (b) an unlocked position wherein the elastomeric member biases the locking ball inwardly, deflecting when the locking ball unseats from the detent to permit handle rotation. When the sleeve is in the unlocked position, the locking ball can incrementally “click” over the detents during handle rotation.

Abstract: A manually operated torque wrench is capable of providing a finite plurality of selectable torque values. The torque wrench has a wrench head, a handle, and a torque-responsive mechanism for producing an indication when a torque value has been applied by the torque wrench. A selector in operable communication with the torque measuring mechanism and adapted to set the torque measuring mechanism to one of a finite plurality of predetermined selectable torque value is provided. A retaining mechanism positively retains the selector when one of the selectable torque values is selected.

Abstract: A wrench includes a drive member for driving a fastener, a retainer securely engaged with the drive member to move therewith, and a casing having a compartment for accommodating the retainer. The casing includes a retaining section defining a retaining space for retaining the retainer in place. When a rotational force applied to the casing is smaller than an engaging force between the retaining section of the casing and a retaining device that is attached between the retaining section and the retainer, the retainer and the rod are turned to thereby turn the fastener. When a rotational force applied to the casing is greater than the engaging force, the casing slides while the retainer and the rod are not turned. The drive member is releasably engaged with the retainer, allowing the wrench to be used with various types of drive members for driving various types of fasteners.

Abstract: The present invention provides an apparatus and method for a torque limiting wrench used for applying a torque to a medical device to prevent damage to the medical device by providing a predetermined torque limit to indicate when the predetermined torque is reached. The torque limiting wrench comprises a gripping mechanism for engaging a medical device, a handle extending from the gripping mechanism and a torque limiting assembly contained within a length of the handle. A predetermined torque is set by the torque limiting assembly to provide an indicator to prevent damage to the acoustic characteristics of the medical device. The torque limiting wrench comprises a material that can undergo a sterilization process.

Abstract: A wrench includes a substantially L-shaped rod and a casing. The L-shaped rod includes a first section and a second section, with a driving portion being formed on the second section for engaging with a fastener. The casing includes a receiving section for accommodating the first section of the rod and a positioning hole for rotatably receiving a portion of the second section of the rod. An engaging member is mounted in a receptacle of the casing and biased to press against the first section of the rod, thereby exerting an engaging force between the first section of the rod and the engaging member. When a rotational force applied to the casing is smaller than the engaging force, the rod is turned to hereby turn the fastener. When a rotational force applied to the casing is greater than the engaging force, the casing slides while the rod is not turned.

Abstract: A torque wrench is formed by a hollow handle, a sheath tube, a head, a slider, a torque transmitting mechanism, a torque adjusting mechanism, etc. The sheath tube covers the front half of the hollow handle with a predetermined gap between the inner and outer surfaces of the sheath tube and the hollow handle, respectively, and is connected to the front of the hollow handle and also to the head at the front thereof. The slider is moveably disposed around the hollow handle in the longitudinal direction of the hollow handle such that the front end surface of the slider opposes the rear end surface of the sheath tube. The torque transmitting mechanism is disposed between the opposing end surfaces of the slider and the sheath tube, and the torque adjusting mechanism is disposed in the rear of the slider and around the rear half of the hollow handle.

Abstract: A torque wrench has a shank, an arm, a torque-adjusting device, a handle and an adjusting knob. The handle is mounted around one end of the shank and has a mouth. A window is defined in the periphery of the mouth. The adjusting knob is rotatably attached to the shank. A stepped protrusion formed on the adjusting knob is connected to the torque-adjusting device and is received in the mouth. A scale is formed on the outer periphery of the stepped protrusion and corresponds to the window. An index line is formed on the handle and corresponds to the scale. Accordingly, the scale can be easily read through the window with the index line. The mouth can provide a protecting effect to the scale to keep the scale from being worn off, such that the useful life of the torque wrench is prolonged.

Abstract: A wrench comprises a rod comprising a driving portion for engaging with a fastener, a retainer having an end securely engaged with the rod to move therewith, and a casing comprising a compartment for accommodating the retainer. The casing comprises a retaining section defining a retaining space for retaining the other end of the retainer in place. When a rotational force applied to the casing is smaller than an engaging force between the retaining section of the casing and a retaining device that is attached between the retaining section and the retainer, the retainer and the rod are turned to thereby turn the fastener. When a rotational force applied to the casing is greater than the engaging force, the casing slides while the retainer and the rod are not turned.