Abstract: A tension alert hand tool comprises a driving portion being installed with a buckling unit; the buckling unit being installed with an elastic unit; a handle being formed with a receiving groove for receiving the buckling unit and the elastic unit; a surface of the handle being formed with an through hole; and a tension alarm device having a sensor switch and an alarm unit; the sensor switch being installed in the receiving groove; the alarm unit being installed in the through hole of the handle; the sensor switch being conductive to the alarm unit; when the sensor switch is touched by the buckling unit, the sensor switch will actuate the alarm unit to light up. The tool is an opener or a spanner. The buckling unit includes an upper teethed block and a lower teethed block; and the upper teethed block is movable along the lower teethed block.

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 method for assembling a torque-limiting driver, and the resulting drive. The method comprises the steps of providing a handle having a housing, drive assembly, and a testing assembly. The drive assembly is assembled, inserted into the testing assembly and calibrated. The drive assembly is then removed and inserted into the housing of the handle and secured to the handle.

Abstract: The present invention provides an automated-torque controlled tool for attachment to a milling machine. The tool comprises an elongated hollow housing defined by a neck section, a middle section, and a bottom section. The neck section is adapted to engage a spindle of the milling machine for rotational and axial movement therewith. A torque spring is situated within the middle section of the housing. A torque adjuster is dimensioned and configured to sit within the neck section of the housing on top the torque spring. A bit holder and driver mechanism are rotationally mounted within the bottom section of the housing. When the torque threshold is reached by the bit holder, the driver mechanism rotationally disengages from the bit holder.

Abstract: A torque adjustable wrench includes an adjusting rod extending from an end of the shank of the wrench and a first toothed surface are longitudinally defined in an outer periphery thereof. A longitudinal positioning groove is defined in the adjusting rod to form a blank area of the first toothed surface. An end cap is connected to the grip which is rotatably connected to the shank and includes second toothed surface which is engaged with the first toothed surface. A positioning member is connected to the end cap and includes a positioning tongue which can be removably engaged with the longitudinal positioning groove. When the torque is set, the grip is pulled to remove the positioning tongue from the longitudinal positioning groove and the user may operate the wrench. The use can trace the original setting by inserting the positioning tongue into the longitudinal positioning groove.

Abstract: A transmission member with torque-restricting protective structure, including: a first transmission section; a second transmission section kept spaced from the first transmission section by a predetermined distance; a first chucking section connected with the first transmission section and having a first chucking end facing the second transmission section; a second chucking section slidably connected with the second transmission section and linearly reciprocally movable between a chucking position and a releasing position, the second chucking section having a second chucking end, when the second chucking section is positioned in the chucking position, the second chucking end being engaged with the first chucking end, when the second chucking section is positioned in the releasing position, the second chucking end being disengaged from the first chucking end; a resilient member for resiliently locating the second chucking section in the chucking position; and an anti-rotating section disposed between the secon

Abstract: A torque regulating assembly includes a first tubular shell having at least one groove disposed along the longitudinal axis of the first tubular shell and a second tubular shell having at least one aperture, wherein the first tubular shell is screwed into the second tubular shell with threads, making the aperture corresponding to the groove. A torque regulating ring having at least one screw hole is put around the second tubular shell. A screwing element is screwed into the screw hole, and the front tip of the screwing element passes through the aperture and moves toward the groove, so that a position of the second tubular shell relative to the first tubular shell is fixed. Then a maximum torque value transmitted by a torque transmitting mechanism disposed inside the first tubular shell and the second tubular shell is regulated.

Abstract: A torque adjustable wrench includes an adjusting rod extending from an end of the shank of the wrench and a first toothed surface are longitudinally defined in an outer periphery thereof. A longitudinal positioning groove is defined in the adjusting rod to form a blank area of the first toothed surface. An end cap is connected to the grip which is rotatably connected to the shank and includes second toothed surface which is engaged with the first toothed surface. A positioning member is connected to the end cap and includes a positioning tongue which can be removably engaged with the longitudinal positioning groove. When the torque is set, the grip is pulled to remove the positioning tongue from the longitudinal positioning groove and the user may operate the wrench. The use can trace the original setting by inserting the positioning tongue into the longitudinal positioning groove.

Abstract: A torque-limiting mechanism is provided for use in a variety of torque-applying tools. The mechanism includes a handle defining a housing in which are disposed a slip gear and a fixed gear. The fixed gear is attached to the housing while the slip gear is attached to drive body extending outwardly from the housing and engageable with an item to be turned utilizing the tool. The slip gear and the fixed gear are connected by ball bearings disposed within recesses located on each gear that are pressed into the recesses by a force exerted on the gears by a number of spring members disposed between an enclosed end of the housing and the fixed gear. The amount of force exerted by the springs on the gears can be varied as necessary, thereby allowing the amount of torque required to enable the slip gear to move with respect to the fixed gear to be set where desired.

Abstract: A torque-limiting driver includes a housing, a shaft carried by the housing for rotation relative thereto and having a workpiece-engaging tip projecting from the housing, a torque-limiting mechanism coupled between the housing and the shaft and responsive to rotation of the housing in a predetermined direction to rotate the shaft at torques below a predetermined torque and accommodating rotation of the housing relative to the shaft at said predetermined torque and above, a torque-determining structure disposed in the housing and movable relative to the torque-limiting mechanism for adjusting the predetermined torque, and the housing including a stop portion engageable with the torque-determining structure for preventing torque-adjusting movement thereof.

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 screwing tool with a device to adjust transmitted torque comprises a handle to introduce a torque to the device, which is borne in the hollow of the handle and a drive shaft as an output element of the torque. On the drive shaft inside the handle, two separate couplings are assembled, having between them a compression spring exerting a spring force against the two couplings. Each coupling comprises a first and a second socket engaging each other by gearings at their opposing faces. The maximum torque at which the torque transmission will be interrupted can be adjusted by an adjustment element wherein the distance between the couplings can be changed, thereby resulting in a change of the tension of the spring exerting a load on the couplings. The teeth of the gearings slide and the sockets rotate relatively to each other and interrupt the torque-transmission if a pre-adjusted torque is exceeded.

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; 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: 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 power screwdriver (1) with a rotationally driven, axially displaceable mounted tool spindle (2) with a low-noise torque clutch (3) which comprises a ratchet-spring biased ratchet coupling (6) driven by a driven ratchet part (12) and a rigid slack clutch spring (7) biased claw coupling (8). The ratchet coupling (6) and the claw coupling (8) are combined using a common, axially displaceable, freely rotatable coupling sleeve (9). The ratchet coupling (6) has opposing oriented, peripheral inclined beveled cams (10) and the claw coupling (8) has opposing oriented catches (11). The driven ratchet part (12) and the coupling sleeve (9) are arranged freely rotatably on an intermediate sleeve (13), which is mounted freely rotatable and axially displaceable on the tool spindle (2). The ratchet spring (5) is arranged between the intermediate sleeve (13) and the coupling sleeve (9) and the clutch spring (7) is arranged between the intermediate sleeve (13) and the tool spindle (2).

Abstract: A torque screwdriver including a handle formed with a window. An indicator is disposed in the handle near the window. A scale is axially movably mounted in the handle. The scale is drivingly connected with a compression mechanism disposed at one end of the handle and a resilient mechanism. The scale is drivable by the compression mechanism to compress the resilient mechanism. The compression distance is obtainable by means of observing the relative positions between the indicator and the scale through the window. The resilient mechanism is drivingly connected with an axially slidable lower toothed tray for transmitting the torque to an upper toothed tray pivotally mounted at the other end of the handle. The upper toothed tray is drivable by the lower toothed tray to output the torque.

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

Abstract: A slotted torque wrench has an elongated stem that extends between a handle and a socket for a nut. The slot extends through one face of the socket and at least partially along the stem. A torque limiter couples the socket to the handle.

Abstract: A screwdriver tool has a driving body and a tool shank mounted in the driving body so it can rotate about its axis. A device for transmitting a torque from the driving body to the tool shank interrupts the torque transmission if a predefined limiting torque is exceeded. In its longitudinal area accommodated in the driving body, the tool shaft has a clutch section featuring a non-circular cross section. At least one spring element adjoins the clutch section radially on the outside. The spring element is mounted in the driving body in a non-rotatable manner with respect to the axis of the tool shank and in a radially deflectable manner against its spring force.

Abstract: A process for manufacturing highly wear and fatigue resistant steel components for power tools includes melting and mixing together a readily available base steel and alloying elements. The molten steel is cast into near-net-shape in an investment casting process. This method is cost competitive with forming the same component from steel with fewer alloying elements. In particular, clutch plates for a drill/driver or screw gun can be formed in this manner from a steel containing relatively large amounts of nickel and chromium, such as SAE 9310 steel, or from a steel containing a relatively large total amount of molybdenum and tungsten, such as AISI M2 steel.

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

Abstract: The invention relates to a device for limiting torque to be transferred, having first and second shafts having a longitudinal axis; at least first and second transfer elements arranged coaxial with the longitudinal axis of the first and second shafts, the first transfer element associated with the first shaft and the second transfer element associated with the second shaft; the two transfer elements having substantially complementary engaging faces; at least one elastic element configured to bias the engaging faces of the first and second transfer elements into engagement with each other; wherein an engaging face of the first transfer element has a first engageable contour, and an engaging face of the second transfer element has a second engageable contour, wherein first and second engageable contours each have first and second active angles and a first passive angle.

Abstract: A torque adjustable screw driver includes a handle and a shank connected to an end of the handle. Two disks are mounted to the shank and each have an inclined end surface. The two respective inclined end surfaces contact each other and one of which includes protrusions and the other has grooves which are sized to receive the protrusions. A sleeve is mounted to the shank and a spring is biased between the inner bottom of the sleeve and the two disks so that the two disks can be rotated from each other when the torque is large enough to make the two disks have relative rotational movement. The required torque can be adjusted by rotating one of the two disks to push the other disk to compress the spring.

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 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: 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 representative screwdriver may comprise a motor, a body, a first spindle, a first clutch member, a tool bit, a second spindle, a second clutch member, a clutch engagement preventing member. The representative screwdriver may be selectively operated in one of a first power transmission mode and a second power transmission mode. In the first power transmission mode, the first clutch member and the second clutch member are disengaged when the reaction torque applied from the work-piece onto the tool bit exceeds a predetermined torque. In the second power transmission mode, the first clutch member and the second clutch member are disengaged when the tool bit moves a predetermined distance away from the body toward the work-piece during the screw-tightening operation. According to the representative screwdriver, the engagement and disengagement of the clutch members during the screw-tightening operation can be assuredly performed in both the operation modes.

Abstract: A torque convertible adapter for driving tools includes a tubular body having an rectangular extension on rear end connected to a handle, a threaded outer periphery, a circular receiving space in front end including three pair of circular recesses in different depth spacedly formed in the bottom thereof, each pair of the circular recesses being symmetrically arranged, three pair of springs in different length and different elasticity respectively disposed into the circular recesses each having a steel ball disposed on free end, a socket spanner having an enlarged circular rear end inserted into the circular receiving space including a plurality of semi-circular recesses engaged with the steel balls, a bolt rotatably secured the socket spanner in the circular receiving space through a central hole in the enlarged circular rear end and the bottom of the circular receiving space, a ring pad sleeved on the socket spanner an a U-shaped cap fastened to the tubular body having a threaded inner periphery engaged with

Abstract: A wrench includes a rod, a retainer, and a casing for accommodating the retainer and allowing relative pivotal movement between the casing and the retainer. The rod includes a driving portion on an end thereof for engaging with a fastener. The retainer has a first end securely mounted to the rod to turn therewith and a second end. An engaging member is mounted in the casing and biased to engage with the second end of the retainer, thereby exerting an engaging force between the second end of the retainer and the engaging member. When a rotational force applied to the casing is smaller than the engaging force, 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 relative to the retainer while the retainer and the rod are not turned.

Abstract: A wrench includes a rod, a retainer, and a casing for accommodating the retainer and allowing relative rotational movement between the casing and the retainer. The rod includes a driving portion on an end thereof for engaging with a fastener. The retainer has a central portion securely mounted to the rod to turn therewith. At least one engaging member is mounted in the casing and biased to selectively engage with one of plural retaining sections of the retainer, thereby exerting an engaging force between the engaging member and an associated retaining section of the retainer. When a rotational force applied to the casing is smaller than the engaging force, the retainer and the rod are turned to thereby turn the fastener. When the rotational force applied to the casing is greater than the engaging force, the casing slides while the retainer and the rod are not turned.

Abstract: A screw driving tool comprises a housing (1), a drive (2), a drive spindle (3), a torque coupling (4) between the drive (2) and the drive spindle (3), as well as an adjustment mechanism disposed between the free end of the drive spindle (3) and the torque coupling (4), the adjustment mechanism is used for adjusting the torque transmitted using the torque coupling (4). The adjustment mechanism has at least one prestressable spring element (5) cooperating with the torque coupling; a compression sleeve (6) that is displaceable parallel to the axis of the drive spindle (3) and cooperating with the spring element (5); a control sleeve (7) arranged coaxially with the compression sleeve (6) and cooperating with the compression sleeve (6); a rotatable adjustment sleeve (8), and a plurality of rotationally mounted planet wheels (10) cooperating in a form locked manner with the control sleeve (7) and inner teeth (9) of the adjustment sleeve (8).

Abstract: A representative screwdriver may comprise a motor, a body, a first spindle, a first clutch member, a tool bit, a second spindle, a second clutch member, a clutch engagement preventing member. The representative screwdriver may be selectively operated in one of a first power transmission mode and a second power transmission mode. In the first power transmission mode, the first clutch member and the second clutch member are disengaged when the reaction torque applied from the work-piece onto the tool bit exceeds a predetermined torque. In the second power transmission mode, the first clutch member and the second clutch member are disengaged when the tool bit moves a predetermined distance away from the body toward the work-piece during the screw-tightening operation. According to the representative screwdriver, the engagement and disengagement of the clutch members during the screw-tightening operation can be assuredly performed in both the operation modes.

Abstract: A clutch specially adapted for a screw gun includes an output clutch and a driving clutch. The output clutch is movable axially to engage the driving clutch. A helical spline arrangement on the driving clutch causes the driving clutch to move axially towards the output clutch a short distance when torque is transferred through the clutch. When the clutch slips and the torque is released, the driving clutch moves axially away from the output clutch a short distance and a gap is created between the output clutch and driving clutch which prevents clashing. Also, a retaining ring is mounted to an input spindle to limit the axial movement of the driving clutch.

Abstract: A wrench comprises a rod, a retainer, and a casing for accommodating the retainer and allowing relative pivotal movement between the casing and the retainer. The rod comprises a driving portion on an end thereof for engaging with a fastener. The retainer has a first end securely mounted to the rod to turn therewith and a second end. An engaging member is mounted in the casing and biased to engaged with the second end of the retainer, thereby exerting an engaging force between the second end of the retainer and the engaging member. When a rotational force applied to the casing is smaller than the engaging force, 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 relative to the retainer while the retainer and the rod are not turned.

Abstract: A wrench comprises a rod, a retainer, and a casing for accommodating the retainer and allowing relative rotational movement between the casing and the retainer. The rod comprises a driving portion on an end thereof for engaging with a fastener. The retainer has a central portion securely mounted to the rod to turn therewith. At least one engaging member is mounted in the casing and biased to selectively engage with one of plural retaining sections of the retainer, thereby exerting an engaging force between the engaging member and an associated retaining section of the retainer. When a rotational force applied to the casing is smaller than the engaging force, the retainer and the rod are turned to thereby turn the fastener. When the rotational force applied to the casing is greater than the engaging force, the casing slides while the retainer and the rod are not turned.

Abstract: A screwdriver of the type having a variable torque-limiting in-line drive with a handle having a cavity and a drive bit disposed in the cavity. Over-ride drive members are disposed in the cavity and a spring exerts a force on the drive members for transmitting only a maximum force to a bit in the screwdriver. Two adjustable controls are at a back end of the tool and they are used to apply a varying force to the spring and thus limit the amount of maximum torque to be transmitted.

Abstract: A screw driving tool comprises a housing (1), a drive (2), a drive spindle (3), a torque coupling (4) between the drive (2) and the drive spindle (3), as well as an adjustment mechanism disposed between the free end of the drive spindle (3) and the torque coupling (4), the adjustment mechanism is used for adjusting the torque transmitted using the torque coupling (4). The adjustment mechanism has at least one prestressable spring element (5) cooperating with the torque coupling; a compression sleeve (6) that is displaceable parallel to the axis of the drive spindle (3) and cooperating with the spring element (5); a control sleeve (7) arranged coaxially with the compression sleeve (6) and cooperating with the compression sleeve (6); a rotatable adjustment sleeve (8), and a plurality of rotationally mounted planet wheels (10) cooperating in a form locked manner with the control sleeve (7) and inner teeth (9) of the adjustment sleeve (8).

Abstract: A torque-limiting screwdriver includes a shank disposed within a handgrip. A rear end of the shank engages the handgrip to enable an axial force to be transmitted from the handgrip to the shank. A release mechanism is provided to transmit rotation from the handgrip to the shank. The release mechanism is axially movable relative to both the handgrip and the shank and is spring biased into rotation transmitting relationship with the shank, whereby the rotation transmitting force applied to the shank is substantially independent of the axial force applied from the handgrip to the shank.

Abstract: A tool socket has a tool-associated element provided with first connecting means formed to connect the first tool-associated element with a tool, a second fastener-associated element provided with second connecting means for connecting the second fastener-associated element with a fastener to be tightened and loosened, the tool-associated element and the fastener-associated element having faces directed toward one another, an engaging element for engaging the first tool-associated element and the second fastener-associated element with one another and including gear teeth provided on the faces of the tool-associated element and the fastener-associated element, and a holding element operative for holding the tool-associated element and the fastener-associated element in engagement with one another and having a holding force limit such that when a resistance of a fastener exceeds a predetermined value the first and second elements disengage from one another and the first tool-associated element continues turnin

Abstract: A torque-limiting assembly includes a collar, a locking ring, and a sleeve member. The collar is co-axially and rotatably coupled to a fitting. The locking ring is non-rotatably coupled to the collar, and includes a plurality of elongate tangs arranged circumferentially around the ring. The sleeve member is non-rotatably and co-axially coupled to the fitting, and has a plurality of contact surfaces that form an outer circumference of the sleeve member. Torque is applied to the collar by way of a plurality of substantially flat surfaces disposed along an outer circumference of the collar. The torque is transferred to the locking ring by way of the fixed geometric relationship between the collar and the ring. The locking-ring tangs securely grasp the sleeve-member contact surfaces when the applied torque is below a predetermined amount, and thereby transfer a substantial entirety of the applied torque to the fitting.

Abstract: A reversible wrench, which includes a box body, an adapter mounted within the box body and supported on an inside annular flange in the box body, the adapter having a bottom coupling extended out the box body for holding a tool and a top ratchet, a driving block fastened to the box body on the inside above the adapter and stopped from rotary motion relative to the box body, the driving block having a bottom ratchet, which is forced into engagement with the ratchet at the adapter for enabling the adapter to be rotated with the driving block when the reversible wrench is attached to the workpiece and forced downwards, and a spring member connected between the adapter and the driving block to push the driving block apart from the adapter.

Abstract: A hand tool of the type having a variable torque-limiting in-line drive with a handle having a cavity and a drive bit disposed in the cavity. Over-ride drive members are disposed in the cavity and a spring exerts a force on the drive members for transmitting only a maximum force to a bit in the tool. A variable control adjustment is on the tool and is used to apply a varying force to the spring and thus control the amount of maximum torque to be transmitted.

Abstract: A device for tightening a bolt or a nut has a tightening socket which is releasable from biting engagement with the bolt or nut by disengaging a clutch in a rotation transmission system after completion of tightening, and which is made readily removable from the bolt or nut. The device is characterized in that it comprises power transmission means for coupling a socket drive motor to the socket for power transmission, the clutch incorporated in the power transmission means for selectively effecting or interrupting power transmission from the motor to the socket by a sliding movement, and clutch control means for selectively moving the clutch to an engaged position or a disengaged position. The clutch is moved to the disengaged position by the clutch control means after the motor is deenergized, whereby residual torque delivered by the motor to the bolt or the nut is removed to preclude biting engagement of the socket with the bolt or nut.

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

Abstract: A support device or post for fitting into an implant implanted into a patient which is configured to support a dental prosthesis is provided. An upper portion of the post, in one embodiment, has external screw threads for coupling a healing cap. The upper portion of the post may be removed or broken away at a weakened portion or constriction. The support device has a collar which can define various heights or diameters. The support device can be positioned in the implant by mating screw threads with the support device being torqued to a predetermined torque, preferably using a torque wrench which can be set using a non-variable, preferably gravity-based, standard.

Abstract: A wrench utilizing high inertial torque energy incorporates a flywheel that is rotated by a drive motor. The wrench is activated by a symmetrical clutch to deliver the rotational energy stored in the flywheel to an output drive. Torque reaction is isolated in the flywheel and clutch mechanism and not transmitted to the housing of the wrench.

Abstract: A coupler for coupling a fastener to a power tool includes a barrel, and a head and a follower rotatably engaged in the barrel and each having one or more projections for engaging with each other and for allowing the follower to be driven by the head. The follower may engage with the fastener to be threaded. The head includes a shaft extended outward of the barrel for coupling to the power tool. A limit member is secured to the shaft for limiting a relative movement of the head to the follower and for allowing the follower to be disengaged from the head.

Abstract: A torque tool which interfaces between a standard drive socket tool and a fastener intended to be tightened which includes an elongated cylinder having a movable element at one end intended to insertably receive a connection with the standard drive socket tool and a coupler movably carried at the opposite end of the cylinder for detachably connecting with a conventional socket to which the fastener is coupled. Inbetween the coupler and the socket tool connection, there is provided a preset torque device which establishes a torque range insuring that the fastener will not be tightened either too tight nor too loose. This device is an expansion helical spring and bears against a gear arranged in rotary sliding relationship with respect to the coupler for joining with the socket engaging the fastener. The member receiving the drive socket tool includes gear teeth which, in combination with the above-mentioned gear, are splined with internal gear teeth formed in the cylinder to house the torque range device.