Abstract: A three-protuberance open-end wrench includes a head section. The head section has a first jaw and a second jaw. Two first protuberances are front and rear, side by side, formed on a holding face of the first jaw. A second protuberance is formed on a holding face of the second jaw. A throat is formed between the holding faces of the first and second jaws for receiving a threaded member therein. The protuberances of the first and second jaws serve to hold the threaded member. The protuberances form a non-isosceles triangle.

Abstract: A torque wrench with double drive ends includes a handle having at least two hollow tubular bodies coaxially connected with each other, two drive heads respectively disposed at two ends of the handle, and a double torque adjustment mechanism including at least one adjustment member, two slide blocks and two elastic members. The two slide blocks are movable within the two tubular bodies. The adjustment member is positioned between the two slide blocks for driving the two slide blocks. The two elastic members are respectively positioned between the two slide blocks and the tubular bodies. By means of the adjustment member, the elastic force applied by the elastic members to the drive heads the can be adjusted to set the torque values thereof.

Abstract: An electronic screw with an electronic torque display is disclosed. The screw includes a body and a torque sensing element. The body has a threading head, a shank connected to the threading head and a recess located on the side wall of the shank. The torque sensing element is disposed in the recess and detected the torque value of the electronic screw. The torque sensing element is electrically connected to the electronic torque display, wherein the electronic torque display displays the torque value that detected from the torque sensing element.

Abstract: An electronic socket is provided. The electronic socket includes a body, a strain gauge, an electronic control module, and a display unit. The body has a driving groove and a passive groove. The driving groove and the passive groove are connected to each other through a channel, wherein the body includes a containing space located on an outside and a recessed groove located in the containing space corresponding to the channel. The strain gauge is disposed in the recessed groove. The electronic control module and a display unit are disposed in the containing space, and the display unit is for showing a data sensed by the electronic control module which obtains from the strain gauge.

Abstract: An electronic torque wrench includes a main body, a display device and at least one pushbutton module. A torque detector is disposed on the main body in adjacency to a working head for outputting a torque value. The display device has an operation unit and a display panel. The pushbutton module is for setting a torque value. The pushbutton module and the torque detector are electrically connected to the operation unit. The operation unit serves to receive and process the torque value to display the torque value on the display panel. The display panel and the pushbutton module are respectively disposed on a top side and a lateral side of the main body.

Abstract: A medical electric drill includes a drilling head, a microprocessor, a pressure sensor unit, a torque sensor unit and a gravity sensor unit. The drilling head is for drilling a bone. The microprocessor is signally connected to the drilling head for calculating a displacement of the drill. The pressure sensor unit is for detecting a pressure change and provides a pressure change signal to the microprocessor. The torque sensor unit is for detecting a torque change and provides a torque change signal to the microprocessor. The gravity sensor unit is for detecting an acceleration variation of the drilling head and provides an acceleration voltage signal to the microprocessor. The microprocessor determines a work period of drilling the bone according to the pressure change signal and the torque change signal, and then the microprocessor calculates the displacement of the drilling head by using the acceleration voltage signal during the work period.

Abstract: An anti-loosening nut is formed with a threaded hole. The wall of the threaded hole is formed with at least one receiving cavity formed on the wall of the threaded hole in an axial direction of the threaded hole. At least one holding member is mounted in the receiving cavity of the nut. The holding member is disposed in the receiving cavity of the nut in the axial direction of the nut. When the nut is screwed onto a screw/bolt, the holding member elastically holds the screw/bolt, whereby the nut and the screw are elastically tightened with each other to avoid loosening of the nut.

Abstract: A collapsible torque wrench includes: a shank having a drive head at a front end and two pivoted ends at a rear end; a connection rod, a front end of which being pivotally connected with the first pivoted end; a housing having a tubular body and a casing fixedly disposed on one side of the tubular body, the connection rod being relatively slidably fitted in the tubular body; a torque adjustment mechanism being mounted in the tubular body and including a fixing block, the fixing block being mounted in the tubular body by at least two pins; and a stop member received in the casing. A front end of the stop member is pivotally connected with the second pivoted end. The fixing block is easily demounted from the tubular body for replacement.

Abstract: A torque wrench includes a mechanical structure and an electronic structure. The mechanical structure includes a tubular body, a flexible rod, an abutment member, an elastic member, a trip mechanism, an adjustment mechanism and a mechanical scale indication mounted in the tubular body for indicating the set torque of the wrench. The electronic structure includes at least one torque sensor and a display unit. When correcting the torque value of the mechanical structure, a force is applied to the wrench and the torque sensor detects the trip torque value of the wrench. The torque value of the mechanical structure is adjusted to match the torque value detected by the torque sensor so as to eliminate the error of the torque value of the mechanical structure.

Abstract: A clamping structure for a tool is provided. The clamping structure includes a plurality of grooves and an inner surface. The inner surface includes two inclined planes. Two convex arcs are connected to the inclined planes. Two concave arcs are connected to the inclined planes, and a middle salient connects one of the concave arcs to the other of the concave arcs. Wherein, an angle between a hypothesized extension line of one of the inclined planes and a hypothesized central line of one of the grooves is 40 degrees-50 degrees. Whereby, the clamping structure is easy to grip a damaged bolt or a damaged nut.

Abstract: A manufacturing method of an elastic C-shaped steel block is described, which includes the following steps. An ordinary steel is cut into a round steel tube. The round steel tube is processed into a ratchet hex socket steel tube. The ratchet hex socket steel tube is cut into a ratchet hex socket block. The ratchet hex socket block is transformed into an elastic ratchet hex socket block by a thermal treatment. An opening is formed in the elastic ratchet hex socket block to change the elastic ratchet hex socket block into a C-shaped elastic steel block.

Abstract: A hand tool includes a handle, a press member, a shank body and multiple latch assemblies. The handle is formed with a receiving cavity and a locating hole in communication with the receiving cavity. The press member is movably disposed in the locating hole. The shank body is fitted in the receiving cavity and movable relative to the handle. The shank body is formed with multiple sockets. The latch assemblies are respectively mounted in the sockets. When the shank body is moved, (for example, slid or rotated) relative to the handle to make one of the sockets aligned with the locating hole, the latch assembly latches the shank body with the handle. When pressing the press member, the latch assembly unlatches the shank body from the handle, the shank body is movable relative to the handle.

Abstract: An open-end wrench includes a handle and a driver. The driver is connected with an end of the handle for providing a torque for a work piece. The driver includes two jaw portions and at least one inclined plane. The two jaw portions are formed on two sides of a front side of the driver, and are spaced for forming an opening. The inclined plane is formed on the driver and inclines from a center of the driver to an edge of the driver, and inclines across one of the jaw portions, and inclines from a connecting portion between the handle and the driver to the front end of the driver.

Abstract: A threaded member has an axial direction. A thread is formed on the threaded member in the axial direction. At least one receiving recess is formed on a circumferential surface of the thread of the threaded member. At least one sensor member is disposed in the receiving recess for detecting tension applied to the threaded member in the axial direction. When a tightened article is tightened by the threaded member, an extension force/tension is applied to the threaded member in the axial direction. The sensor member is positioned in adjacency to the thread of the threaded member so that the sensor member can precisely detect the extension extent of the threaded member for precisely obtaining the tightening force applied to the threaded member.

Abstract: A threaded member capable of detecting tension includes a sensor component. A receiving space is formed in the threaded member. The sensor component has a flexible member and a sensor. The sensor is disposed on the flexible member. The sensor component is disposed in the receiving space of the threaded member and preset in a compressed/flexed state in an axial/longitudinal direction of the threaded member. When an article is tightened with the threaded member, the threaded member is tensioned to change the flexion of the flexible member. At this time, the sensor can detect and find the tension of the threaded member to achieve the tightening force applied to the threaded member.

Abstract: An electrical torque screwdriver includes a handle, a shaft, a torque limiter, and an electrical switch. The shaft is disposed on the handle and rotatable but not movable linearly. The torque limiter includes a driving tooth, a slipping block, a pawl, and at least one restoring element. The driving tooth is disposed on the shaft. The slipping block is disposed on the handle. The slipping block is displaceable linearly but not rotatable. The pawl is disposed on the slipping block and engaged with the driving tooth. The restoring element is pivotally disposed on the handle and has a restoring force, wherein one end of the restoring element resists against the slipping block for pushing the pawl to be engaged with the driving tooth. The electrical switch is disposed on the handle for optionally resisting against the other end of the restoring element to stop the restoring element.

Abstract: A threaded member capable of detecting tightening force includes a head section, a threaded rod section and at least one strain sensor. The head section has a bottom face, a skirt section and a receiving space. The threaded rod section is disposed under the bottom face of the head section. A sink section is formed on the bottom face of the head section. The strain sensor is disposed on the bottom face of the head section and positioned in the receiving space. Due to the sink section, when the head section is strained and deformed, the strain sensor can sensitively and precisely detect the strain capacity of the head section and provide the tightening force of the threaded member for a user to more precisely tighten the threaded member.

Abstract: A wrench with quickly angularly adjustable handle includes ahead section and a handle. The head section and the handle are pivotally connected with each other via a first and a second pivoted ends, whereby the handle can be up and down swung relative to the head section. The first and second pivoted ends respectively have a first and a second end faces facing each other. The first end face is formed with an upper and a lower contact sections. The second end face is formed with an upper and a lower abutment sections. The lower abutment section abuts against the lower contact section as a lower dead end of angular displacement of the handle. The upper abutment section abuts against the upper contact section as an upper dead end of angular displacement of the handle.

Abstract: A double ratchet structure includes a base, a first directional member, a second directional member, two resetting members, a choosing member, a driving member and a pivoting member. The first and second directional members are pivotally disposed on the base, the first directional member pivots oppositely to the second directional member. The resetting members are respectively disposed between the first or the second directional member and the base for protruding the first or the second directional member from the base. The choosing member is coaxially and pivotally disposed on the base and covers the first and the second directional members. The choosing member catches the first or the second to pivot toward the base. The driving member is coaxially and pivotally disposed on the base through the pivoting member for engaging with the first or the second directional member.

Abstract: A bidirectional ratchet structure includes a base, a first pawl element, a second pawl element, two reset elements, a direction controller and a driving element. The first pawl element, the second pawl element, the direction controller and the driving element are pivotally disposed at the base. The first pawl element includes a first engaging portion. The second pawl element includes a second engaging portion. The first engaging portion and the second engaging portion are pushed to protrude from the base alternatively. The two reset elements are for pushing the first engaging portion and the second engaging portion to protrude from the base respectively. The first pawl element and the second pawl element are surrounded by the direction controller and the driving element. The direction controller is for pressing the first pawl element or the second pawl element toward the base.