Abstract: A torque wrench includes a first part, a second part, a first spring, a block and a second spring. The first part includes a first section and a second. An axial passage is defined through the first part and a second part is received in the passage. The first part and the second part are connected to each other. The first spring is securely located in the second section. A pushing member is located in the first spring and includes a second contact portion. The block is removably in contact between the first and second contact portions. A second spring is mounted to the pushing member. The block is disengaged from the first and second contact portions when the torque wrench rotates clockwise or counter clockwise.

Abstract: A torque wrench with torque adjustment mechanism includes a tubular body and a torque adjustment mechanism disposed in the tubular body. The torque adjustment mechanism includes an abutting member, an adjustment member and an adjustment button. The abutting member has a first slope disposed at rear end of the abutting member in contact with a second slope disposed at a front end of the adjustment member. When adjusting the set torque value of the torque wrench, the adjustment button is rotated to drive the adjustment member to displace in a transverse direction of the tubular body. By means of the cooperation between the first and second slopes, the abutting member is displaced in a longitudinal direction of the tubular body to compress or release an elastic member positioned in front of the abutting member.

Abstract: A torque wrench is provided that extends along a longitudinal axis and includes a head, a body, and a torque adjustment assembly. The head is shaped and adapted to engage at least one of a fastener or a torque-application adaptor aligned with a torque axis. The body includes a handle and a click-pivot assembly. The click-pivot assembly includes first and second members coupled by a link, and is configured to indicate application of a predetermined amount of torque via the handle. The head is pivotally coupled to the body via the torque adjustment assembly. A change in an angle between the torque axis and the longitudinal axis dynamically adjusts an amount of torque provided by the head by a predetermined amount relative to the predetermined amount of torque applied via the handle.

Abstract: Methods and devices that displace bone or other hard tissue to create a cavity in the tissue. Where such methods and devices rely on a driving mechanism for providing moving of the device to form a profile that improves displacement of the tissue. These methods and devices also allow for creating a path or cavity in bone for insertion of bone cement or other filler to treat a fracture or other condition in the bone. The features relating to the methods and devices described herein can be applied in any region of bone or hard tissue where the tissue or bone is displaced to define a bore or cavity instead of being extracted from the body such as during a drilling or ablation procedure.

Abstract: A method for improving wear properties of a torque wrench includes electroplating one or more components of the torque wrench with zinc. In an aspect, one or more of an interior surface of a tube component, a surface of a secondary arm, a surface of a cam, and a surface of a pawl components may be electroplated with zinc. These components may interact to provide a click mechanism. For example, the pawl component may be seated between the secondary arm and the cam components, and the cam is adapted to move against a bias force when the secondary arm shifts the pawl in response to a preset torque level being achieved. The electroplated zinc layer provides a corrosion-resistant, softer and smoother surface for these components, and serves as a frictional reducer when the zinc oxidizes to form zinc oxide, which improves the accuracy life of the tool.

Abstract: An L-shaped torsional wrench is provided. The wrench includes a shell body, an elastic member, an L-shaped rod and a handle. A pushing member is assembled in the shell body and is movable between a first position and a second position along the shell body. The elastic member is compressed by the pushing member when the pushing member is located in the first position for compressing the elastic member. The pushing member is noncompressed by the elastic member when the pushing member is located in the second position so that the elastic member recovers from said compression for slowing the fatigue of the elastic member, extending the durability of the elastic member and keeping the torsional accuracy of the wrench.

Abstract: A torque wrench includes a hollow body, a clutch mechanism, a force-applying member, and driving arms. The clutch mechanism is mounted in the hollow body. The force-applying member is pivotally mounted in the hollow body. Each of driving arms has a coupling end is detachably mounted at the second end of the force-applying member and a driving end for driving a workpiece, wherein each of the driving arms is coaxial to the force-applying member when the coupling end thereof is mounted at the second end of the force-applying member, and wherein the interchangeable driving arms are different in length from each other.

Abstract: A torque wrench with functional lock includes a hollow main shaft, a tool member, an adjustable grip, a torque-adjustment elastic member, a clutch device, and a functional lock. The locking ring axially moves along the main shaft between a locked position and an unlocked position. When the locking ring is in the locked position, the rotation of the adjustable grip against the hollow main shaft is limited. When the locking ring is in the unlocked position, the rotation of the adjustable grip against the hollow main shaft is allowed, whereby the torque is adjusted. Therein, a percussion sound is produced when the locking ring is switched between the locked position and the unlocked position.

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: An isolative torque-exerting apparatus includes a wrench, a torque unit substantially located in the wrench, and an isolative unit provided on the wrench. The isolative unit includes a first isolative element for covering a portion of the wrench and a second isolative element for covering the remaining portion of the wrench. The first or second isolative element includes at least one cutout defined therein while the second or first isolative element includes a key located in the cutout.

Abstract: An adjustable torque wrench includes a driving shank pivotally coupled to a tubular lever and biased with a compression spring, an adjusting screw for adjusting a compression force of the compression spring, and a barrel attached to the adjusting screw and rotated in concert with the adjusting screw and having a graduation aligned with a window of the tubular lever for allowing the graduation of the barrel to be seen through the window of the tubular lever, a control ferrule is slidably engaged with the adjusting screw for rotating the adjusting screw to adjust the compression force of the compression spring, and a lock device attached to a handle for selectively anchoring the control ferrule to the handle.

Abstract: An electronic torque wrench (10) comprises a hand grip body (11) equipped with a user interface (12), electronics (13) for controlling the wrench, a grasping area (18) and power supply batteries. The hand grip body projects out at the front with a mechanical connecting element (14) which ends at one extreme with a clamping head (16), whereas at the rear end it is equipped with a removable battery element (19) which is connected to the hand grip body through a connector group (20) for electric and mechanical connection. When the battery element (19) is removed, a connector (20a) is uncovered at the rear end of the hand grip body (11) for the connection of the wrench to a matching connector (20c) of an electric cable (21) for connecting to an external unit (22) for supplying power to the wrench and controlling it.

Abstract: A signaling torque driver that includes a casing assembly with a grip portion, a click arm with a fastener-engaging portion that projects from said casing assembly at one end and operably coupled to a torque-limiting means housed within said casing assembly at the other, torque-adjusting means within said casing assembly and coupled to said torque-limiting means for adjusting the torque-limiting means to a desired torque value, audible signaling means operably coupled with said torque-limiting means and/or visual signaling means operably coupled with said torque-limiting means such that an audible and visual indicator is activated to signal that the desired torque has been reached.

Abstract: An adjustable torque wrench includes a driving shank pivotally coupled to a tubular lever and biased with a compression spring, an adjusting screw for adjusting a compression force of the compression spring, and a barrel attached to the adjusting screw and rotated in concert with the adjusting screw and having a graduation aligned with a window of the tubular lever for allowing the graduation of the barrel to be seen through the window of the tubular lever, a control ferrule is slidably engaged with the adjusting screw for rotating the adjusting screw to adjust the compression force of the compression spring, and a lock device attached to a handle for selectively anchoring the control ferrule to the handle.

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: 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 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: An electronic torque wrench includes a tubular housing having a surrounding wall confining a receiving space, a working unit having a shank portion extending axially into the receiving space and pivoted to the surrounding wall at a pivot point, a strain sensor provided in the working unit, a trip unit having at least one driven element disposed in the shank portion, and a central processor connected electrically to the strain sensor and the trip unit. The driven element is movable to a tripping position, in which the driven element is not pressed tightly against the surrounding wall so that the working unit is permitted to pivot relative to the tubular housing. The central processor controls and moves the driven element to the tripping position when an applied torque measured by the strain sensor is larger than a preset reference torque value.

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: 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: An electronic torque wrench includes a head portion, a handle portion connected to the head portion and having a tubular wall that defines a receiving space, a strain sensor unit disposed in the head portion, and an indicator unit disposed in the receiving space and including a rotary member having a rotatable portion, a first indicator connected to the tubular wall, and a second indicator fixed to the rotatable portion. The first and second indicators strike each other to produce a sound when the rotatable portion is rotated. A controlling unit is connected electrically to the strain sensor unit and the rotary member, and actuates the rotatable portion to rotate when the strain sensor unit detects a torque that is larger than a reference torque level.

Abstract: A digital torque wrench is disclosed having a transducer beam with a reduced thickness web therein. At least one strain gauge sensor is mounted to the internal web to measure the shearing stress within the web as the wrench is rotated. By using such a reduced thickness web, mounting the sensors in opposed orientations, mounting the transducer beam to the torque wrench handle using first and second longitudinal flanking pins, and providing the transducer beam in a tapered shape, the resulting measurement of the torque wrench is very accurate. Moreover, a rotational interface module with digital display is provided to facilitate reading of the display by the user.

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: A replaceable and rotatable tool with a function of measuring twisting forces comprises a tool body; a driving portion formed at one end of the tool body; the driving portion including a pivotal unit and an engaging unit; one end of the pivotal unit being secured to the tool body and another end thereof being pivotally installed with one end of the engaging unit so that the engaging unit being rotatable along the pivotal shaft; another end of the engaging unit being formed with an opening for movably installing various driving head. The pivotal unit is formed with at least one inclined surface for controlling the slope of the engaging unit with respect to the axis of the handle. The angle of the engaging unit with respect to the axis of the handle is retained within a range of 15 degrees in each of two rotating directions.

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 wrench is disclosed having torque range indicators. The torque wrench includes a handle, a torquing tool, a mounting bar and a programmable interface module. At least one torque sensor is communicatively coupled to the interface module. The interface module includes an input device able to receive at least one predetermined torque value, a torque value indicator, a torque range indicator, and a controller. The torque value indicator, the torque sensor, and the torque range indicator are communicatively coupled to the controller, and the controller is programmed to activate the torque range indicator based on a torque range calculated by comparing a torque value received from the torque sensor to the at least one predetermined torque value.

Abstract: A digital torque wrench is disclosed having a transducer beam with a reduced thickness web therein. At least one strain gauge sensor is mounted to the internal web to measure the shearing stress within the web as the wrench is rotated. By using such a reduced thickness web, mounting the sensors in opposed orientations, mounting the transducer beam to the torque wrench handle using first and second longitudinal flanking pins, and providing the transducer beam in a tapered shape, the resulting measurement of the torque wrench is very accurate. Moreover, a rotational interface module with digital display is provided to facilitate reading of the display by the user.

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: 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 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: The invention concerns a dynamometric key designed in particular for fixing an insert (22) on a handpiece (23). Said dynamometric key is characterized in that it consists of a grip element (3), and a securing element (5), said two elements being linked in frictional rotation via a spring (1) whereof the end coils have been assembled, so as to provide it with a globally toroidal shape.

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 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: An electromechanical releasing torque wrench which includes an electronic controller (50) and transducers (32) or (34) to measure and actuate a release of the wrench with physical, audible and visual signals. In operation, the user sets the desired torque-release-point on the keypad (60) of the electronic controller and then attaches the wrench to a workpiece with the ratchet means which pivotally protrudes from the enclosure (20). The user tightens the workpiece, normally a threaded fastener, and the force sensing means attached to the ratchet (28) produce an analog signal which is applied to the controller. When the release point is reached the controller sends a signal to a solenoid (44) creating linear mechanical motion causing the mechanical advantage locking latch and trigger means to disconnect the ratchet producing a momentary reduction of force felt by the operator and an audible clicking sound as the ratchet strikes the enclosure.

Abstract: A tang engaging and stability structure has a tang engaging portion and a pair of stabilizing ear members spaced apart from one another in the direction of the pivot axis. The ear members are positioned on opposing sides of a rear end portion of the tang structure to restrict movement of the tang structure rear end portion generally in the axial direction of the pivot axis. During a torque applying operation, a force applied to the wrench body is transmitted as torque to a fastener removably engaged with the head and tends to pivot the casing structure relative to the drive structure about the pivot axis. When a torsional resistance offered by the fastener reaches a threshold level determined by the biasing force, the force being applied to the wrench body pivots the casing structure relative to the drive structure to the torque exceeded position to generate the torque exceeded signal.

Abstract: An adjustable torque wrench includes a driving head having an arm received in a shank, and a follower and a spring received in the shank and guided to move along the shank. The follower may be moved to adjust the spring force against the arm. A handle is threaded onto the shank. A knob is secured to the follower. A lock may lock the follower to the shank and includes a control ferrule engaged on the knob and engaged onto the handle with such as a key or a teeth engagement in order to lock the knob to the handle and to prevent the knob from being rotated relative to the handle.

Abstract: An electromechanical releasing torque wrench which includes an electronic controller (50) and transducers (32) or (34) to measure and actuate a release of the wrench with physical, audible and visual signals. In operation, the user sets the desired torque-release-point on the keypad (60) of the electronic controller and then attaches the wrench to a workpiece with the ratchet means which pivotally protrudes from the enclosure (20). The user tightens the workpiece, normally a threaded fastener, and the force sensing means attached to the ratchet (28) or (62) produce an analog signal to the controller. When the release point is reached the controller sends a signal to a solenoid (44) or linear actuator (66) creating linear mechanical motion causing the mechanical advantage locking latch and trigger means to disconnect the ratchet producing a momentary reduction of force felt by the operator and an audible clicking sound as the ratchet strikes the enclosure.

Abstract: There is provided an analog dental torque wrench in which, at a given level of torque imparted to a dental work object, force communicated by a compression spring through an interface impart against a ball bearing will cause rotation of a handle and medial hollow cylindrical segment of the wrench off of the bearing to an off-axis position relative to a longitudinal work axis, disabling a wrench head, precluding further application of a torque to the work object, and causing shear of the wrench to occur either to the left or right of the longitudinal axis, and external to the mouth of the patient.

Abstract: An electromechanical releasing torque wrench which includes an electronic controller (50) and transducers (32) or (34) to measure and actuate a release of the wrench with physical, audible and visual signals. In operation, the user sets the desired torque-release-point on the keypad (60) of the electronic controller and then attaches the wrench to a workpiece with the ratchet means which pivotally protrudes from the enclosure (20). The user tightens the workpiece, normally a threaded fastener, and the force sensing means attached to the ratchet (28) or (62) produce an analog signal to the controller. When the release point is reached the controller sends a signal to a solenoid (44) or linear actuator (66) creating linear mechanical motion causing the mechanical advantage locking latch and trigger means to disconnect the ratchet producing a momentary reduction of force felt by the operator and an audible clicking sound as the ratchet strikes the enclosure.

Abstract: A surgical torque wrench having jaws for application to a rotating part and a handle removably secured to the jaws. The jaws and handle are secured together about a pivot that is parallel to the axis of rotation of the rotating part. A securing device is fitted between the jaws and the handle which secures them relative to each other in a given angular position and is releasable when a given torque is reached. A removable handle member is provided to fix the jaws to the handle to allow for application of torque.

Abstract: An improved and less costly torque wrench adjusting and calibrating structure for accurate axial biasing and adjustment of an elongate axially extending spring in an elongate axially extending tubular lever arm of an adjustable click-type torque wrench.

Abstract: An antifriction force transmission, especially useful in torque wrenches comprises a freely rotatable cylindrical roller, opposed interface reaction surfaces in cooperative relation with the roller, and the roller and the reaction surfaces cooperating for effecting relative separating movement of the reaction surfaces when at least one of the reaction surfaces is caused to move transversely relative to the other of the reaction surfaces.

Abstract: A torsion wrench includes a tubular casing, a drive unit pivoted to one end of the casing to engage a workpiece, and an alarm assembly connected to the drive unit for generating an alarm sound when torsion force applied on the workpiece reaches a predetermined limit. The alarm assembly includes a bolt mounted threadably in another end of the casing and rotatable relative to the casing so as to be movable along an axis of the latter to adjust the predetermined limit, and a lock unit for locking the bolt. The lock unit includes a first sleeve sleeved slidably and non-rotatably on the casing and having a retaining end, a second sleeve sleeved slidably and rotatably on the casing and having an engaging end to engage releasably the retaining end, and a tubular handle sleeved on the first and second sleeves and having one end connected to the bolt and another end connected to the second sleeve.

Abstract: A tool is provided for the exertion of a turning moment, including an indication as to whether the turning moment exceeds a set value, in which a form piece (4) with parallel rectangular surfaces turns when the turning moment attains the set value and pushes a press bolt (3) situated in the shaft (2) and a indication sleeve (6) situated outside the shaft, said indication sleeve being connected with the press bolt, towards the grip (11) so that a previously hidden part of the indication sleeve (6) with a contrasting color becomes visible.

Abstract: A precision tuning tool for use in tuning a tunable lug rotatably mounted on a musical drum includes an elongated handle, a torque applying mechanism engageable with the lug for applying torque to the lug so as to tune the lug by pivoting the elongated handle relative thereto, a torque calibrating mechanism mounted to the elongated handle for defining a desired preset amount of torque to be applied to the lug by the torque applying mechanism, a preset torque indicating mechanism mounted to the elongated handle and mounting and supporting the torque applying mechanism adjacent to one end of the elongated handle and, in response to application of torque to the lug by the torque applying mechanism, being operable for producing an indication when the desired preset amount of torque has been applied to the lug, and a biasing mechanism mounted to the elongated tubular member and to the torque calibrating mechanism for applying a desired level of biasing force to the preset torque indicating mechanism in response to

Abstract: An improved torque wrench for procedures requiring the application of precise small torques. The wrench includes a handle pivotally connected to a cam member rigidly attached to a driving head. The handle breaks out of alignment with the extending cam member upon application of an adjustable torque limit. A spring-biased plunger within the handle normally holds a rigid ball within an elliptical indent in the cam member. Application of the torque limit on the handle forces the ball out of the indent and onto an angled surface before a projecting flange of the handle contacts the cam member and limits the further pivot of the handle. The angled surface provides a reaction force to the ball sufficient to maintain the handle in a pivoted position. The handle pivots a noticeably large angle of 30.degree. before the flange contacts the cam member.

Abstract: A torque wrench capable of pre-setting specified torque values is disclosed which comprises an elongated housing and an output drive shaft. Pivotally secured to and located within the housing are a plurality of levers. A first lever is journalled to the output shaft for rotation therewith and the remaining levers are pivotally secured to the housing adjacent their first ends at spaced intervals along the longitudinal center line of the housing and, with the exception of the last of these levers, have second ends which engage the first end of the next, adjacent lever whereby pivoting of the first lever results in pivoting of each of the levers through their interconnections. Further included is a torque value setting assembly which acts between the housing and at least one of the levers to apply a force to the lever which must be overcome in order for that lever to pivot.

Abstract: A simplified torque signalling wrench in which the torque responsive means comprises a camming recess or notch in the outer end of a wrench shank within a handle for the wrench and to which the shank is pivoted to provide limited angular movement for the outermost end of the shank with a ball surface being yieldingly forced into the recess defined by walls of the recess by spring loading to maintain the shank along the centerline of the handle and yielding to camming forces under a torque load to effect relative angular movement of the shank and handle to signal a torque load in excess of a torque load determined by the adjustable loading of the spring.