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

Abstract: A steering and positioning structure of a ratchet screwdriver has a main body, ratchet assembly, radial holding tank, two upper snapping blocks in multi-tooth meshed pattern and two downward abutting pieces, as well as an elastic abutting member, revolving drum and revolving drum split positioning member. The upper snapping blocks are activated in tune with the downward abutting pieces, such that the upper snapping blocks can be formed by means of powder metallurgy and demolding. Multiple snapping teeth could be formed on the snapping blocks. As the snapping teeth can mated with the ratchets of the ratchet assembly in multi-tooth meshing pattern, the structure can meet the multi-tooth meshing structural demands for convenient forming, and also improve substantially the torsion of the ratchet screwdriver, enhance the ease-of-operation and mass production for higher economic benefits.

Abstract: A shifting device for a wrench tool contains: a tool head including a driving portion and an axial hole, and the axial hole having a plurality of inner teeth; a rotating rod including an axial peg extending outwardly to be fitted in the axial hole, and the axial peg including a first groove and a second groove communicating with the first groove; an engaging member received in the first groove and having a toothed section and a pushing section; a controlling member fixed in the second groove and having an abutting stem extending into the first groove, such that the controlling member pushes the pushing section so that the toothed section engages with the plurality of inner teeth; two elastic loops fitted on the axial peg of the rotating rod to push one end of the engaging member so that the engaging member moves back to an original position.

Abstract: A shifting device for a wrench tool contains: a tool head including a driving portion and an axial hole, and the axial hole having a plurality of inner teeth; a rotating rod including an axial peg extending outwardly to be fitted in the axial hole, and the axial peg including a first groove and a second groove communicating with the first groove; an engaging member received in the first groove and having a toothed section and a pushing section; a controlling member fixed in the second groove and having an abutting stem extending into the first groove, such that the controlling member pushes the pushing section so that the toothed section engages with the plurality of inner teeth; two elastic loops fitted on the axial peg of the rotating rod to push one end of the engaging member so that the engaging member moves back to an original position.

Abstract: A wrench includes a body, a first driving head, a second driving head, a first ratcheting mechanism and a second ratcheting mechanism. The first ratcheting mechanism connects the first driving head to the body. The second ratcheting mechanism connects the second driving head to the body.

Abstract: A one-way driver includes a handle, a shaft and an engagement unit. The shaft is rotationally inserted through the handle. The engagement unit is used to engage the shaft with the handle when the handle is pivoted in a direction and allow disengagement of the shaft from the handle when the handle is pivoted in an opposite direction.

Abstract: A power driven tool for rotating a mechanical element. The tool includes a housing and motor. The motor has an output shaft. The shaft rotates relative to the housing. The tool also includes an impact drive axially fixed within the housing. The impact drive includes a base and an anvil shaft having an anvil. The impact drive includes an annular hammer having opposite impact lands pivotally mounted on the base for movement between three positions, including a forward position in which the hammer is positioned so one impact land engages the anvil, a reverse position in which the hammer is positioned so another of the impact lands engages the anvil, and a disengaged position in which neither of the impact lands engages the anvil. Further, the tool includes a ratchet mechanism. The ratchet mechanism includes an output drive mounted for rotation relative to the housing for rotating a mechanical element.

Abstract: A ratcheting handle having a ratchet device, an asymmetrical, triangular-shaped grip, and a tool adapter connected to the grip by the ratchet device, and a selector for changing the ratcheting direction of the ratchet device. The selector has a cylindrical wall that surrounds the tool adapter, guides the tool into engagement with the tool adapter, and stabilizes the tool when the grip is being rotated. The tool may be a conventional socket tool or a universal socket tool having a plurality of pins that are closely packed in parallel to each other and which move in accordance with the size of the fastener. The grip includes a first gripping portion extending below the rotational axis of the ratchet device and a second gripping portion extending above the rotational axis.

Abstract: An axial pawl ratcheting mechanism is provided that may be used for a wrench and comprises a first disc including axial gear teeth on a first side providing for ratcheting in a first direction. A second disc is provided having axial gear teeth and peripheral gear teeth. The second disc is mounted to the first side of the first disc so that the first disc axial gear teeth engage the second disc axial gear teeth and provide an axial pawl ratchet assembly. A ratchet head is provided having an internally toothed opening for receiving the axial pawl ratchet assembly therein so that the peripheral gear teeth of the second disc engage the internal diameter teeth of the ratchet head in order to transfer torque between the ratchet head and the axial pawl ratchet assembly. An actuator is provided for adjusting the positioning of the axial pawl ratchet assembly between a first engagement position and a second engagement position.

Abstract: A bi-directional screwdriver with a ratchet driving head comprises: a dynamic driving unit having a handle at one end thereof and a driving portion at an upper end thereof; a driving switch being protruded out from a lateral side of the handle; a hollow resisting portion being installed at a front end of the driving portion; an inner periphery of the resisting portion having axial teeth; an annular sheet enclosing an outer periphery of the resisting portion; a via hole being formed on the annular sheet; and a connecting unit having one end being installed with a rectangular engaging portion for receiving a sleeve; the connecting unit being detachably connected to the engaging portion; another end of the connecting unit being formed with a ratchet portion; the connecting unit being formed with an axial hole; and a plurality of threads being formed on a rear inner periphery of the connecting unit.

Abstract: A ratcheting driver for rotationally driving a piece and having a handle and pivotal pawls engageable with a driven gear and being capable of ratcheting and driving in both rotational directions. A cap is rotatable relative to said handle and it has a web for pivoting the pawls out of engagement with the gear. Through the selective rotation of the cap, the setting of the pawls is established. A spring positions the pawls in driving positions, and the cap has surfaces which disengage the pawls from the gear upon rotation of the cap. A method of arranging the driver is included.

Abstract: A tire-assembly spanner which comprises a hollow handle installed with a bending tube portion at one end thereof; another end of the handle being installed with a holding portion; an engaging element installed to one end of the resisting portion far away from the handle; one end of the engaging element having an engaging portion for receiving a sleeve; one end of the engaging element having a ratchet teeth portion corresponding to the resisting portion; an inner side of the ratchet teeth portion being formed with an annular ratchet teeth. A switch is installed in the bending tube portion. A resisting portion is formed between the bending tube portion and the engaging element; the resisting portion has a through hole for receiving a switch.

Abstract: A wrench has a handle integral with a ratchet head that defines a chamber having a generally circular sidewall. An annular rotor has radial teeth about an outer surface thereof and is located in the chamber. The rotor teeth engage a single set of teeth extending radially inward from the chamber sidewall. Preferably, the sidewall teeth will be configured to have substantially equal height. Additionally, the two sides of each sidewall tooth that engage the rotor teeth will be configured to be substantially parallel.

Abstract: A screwdriver includes a handle, a first body having an end securely mounted in the handle, a second body rotatably mounted in the first body, a ratcheting mechanism slidably mounted in a receiving section in the other end of the first body, and a switch member pivotally mounted to the other end of the first body. The switch member is pivotable between a first position and a second position to control engagement/disengagement of the ratcheting mechanism with/from teeth of the second body and to control relative rotation between the first body and the second body. A reinforcing member is provided in the receiving section to withstand high-torque operation.

Abstract: An oil drain plug wrench is provided to enable a user to more easily remove and install an oil drain plug. The wrench includes a rotor with two cavities on opposite sides of a rotor. When either of the cavities engages a workpiece, the wrench is capable of applying torque to the workpiece in a first rotational direction and ratcheting in a second rotational direction. A flange is provided on the outer diameter of the rotor to allow a user to remove or install an oil drain plug by hand.

Abstract: A ratchet screwdriver and method of making same wherein there is a handle and there is a ratchet gear and pawls inside the handle. An adjuster is inside the handle and is movable by a tool extending into the handle for positioning the adjuster relative to the gear and thereby eliminating play between the gear and the handle. Ball bearings are interposed between the handle and the gear and the bearings rotatably support the gear and transmit the anti-play forces that act on the gear.

Abstract: A ratchet screwdriver having a base assembly including a handle and an insert, and having a can rotatable on the base assembly, and there is pawl mechanism which is controlled by the cap. There is an intervening member in the form of a detent to serve as a stop for restricting the axial movement of the cap relative to the base assembly, so the cap cannot be removed from the base assembly until the detent is released. The detent, or other parts of the screwdriver, can serve as a rotation stop for the can which has selective positions for setting the ratcheting position of the screwdriver.

Abstract: A ratcheting tool driver has a handle and a ratcheting body that includes a plurality of recesses for receiving a plurality of pawls having teeth formed thereon. A cover is axially secured to the ratcheting body and rotates relative to the body over a limited distance. The cover is formed so that it interacts with the plurality of pawls, which are operatively received in the body recesses so that they engage and disengage teeth formed on a socket ring. The socket ring contains a plurality of teeth on its outer circumference, is received in an axial bore formed in the ratcheting body, and operatively engages the pawl teeth.

Abstract: A bit-driving apparatus is provided between a handle and a bit. The bit-driving apparatus includes a hollow shaft and a bit receiver. The hollow shaft includes a first section for connection with the handle and a second section. The bit receiver includes a first space for receiving the second section of the hollow shaft and a second space for receiving the bit. The hollow shaft drives the bit receiver through a driver. At least one connector connects the internal wall of the first space of the bit receiver with the periphery of the second section of the hollow shaft.

Abstract: A screwdriver includes a body, a ratchet wheel, two pawl members, two elastic members, a cover, and a catch plate. Thus, the cover can be removed from the body, so that the user can inspect and adjust connection between the pawl members and the ratchet wheel, thereby facilitating the user repairing the screwdriver. In addition, the catch plate stops movement of the ratchet wheel and the pawl members, thereby preventing the ratchet wheel, the pawl members and the elastic members from detaching from the body after the cover is removed from the body.

Abstract: A ratchet wrench includes a base connected to a handle and a cylindrical top on the base has two recesses for receiving two pawls therein. Each recess includes a hole in an inner bottom thereof so that the two pawls are pivotably inserted in the two holes by their respective shafts. A ring is rotatably mounted to the cylindrical top and has a concaved area for allowing at least one of the two pawls to be extended outward. A driving member having a skirt portion which has teeth defined in an inner periphery thereof and the teeth are engaged with at least one of the two pawls. The base is easily to be manufactured and the two shafts of the two pawls are easily to be assembled in the recesses.

Abstract: An improvement in ratchet coupling means of a driving tool includes a driving member inserted into a handle and covered by a control ring, a ratchet ring and a circular cap, a pair of springs biase the checking blocks in the driving member each having teeth on the sloped surface engaged in the teeth of the ratchet ring and selectively operated by four diagonally arranged stir bars in the control ring which further has three separate positioning grooves respectively engageable within a spring biased steel ball from the driving member for permitting the ratchet driving tool to conduct three fastening modes by its hexagonal socket wrench. A phillips tipped hexagonal shank may be secured to the driving tool by necessary components to change the socket wrench into a screwdriver.

Abstract: A ratchet opener comprises a rod body; a ratchet device having a seat; a top surface of the seat having two axial grooves; each groove being installed with a spring and a ratchet block; an adjusting sheet placed above the seat; and a ratchet sheet being installed above the adjusting sheet. Each ratchet block has a teethed inclined surface; the teeth surfaces of the two ratchet blocks are symmetrical to a center of the seal. A center of the adjusting sheet is installed with a second via hole; and the ratchet block is installed with a non-round buckling hole corresponding to the cylinder at the lower end of the rod body. In use, by controlling the adjusting sheet, the objects of unidirectional, bi-directional, and idle rotations are achieved. The operation is easy.

Abstract: A ratchet screwdriver having a base assembly including a handle and an insert, and having a cap rotatable on the base assembly, and there is pawl mechanism which is controlled by the cap. There is an intervening member in the form of a detent to serve as a stop for restricting the axial movement of the cap relative to the base assembly, so the cap cannot be removed from the base assembly until the detent is released. The detent, or other parts of the screwdriver, can serve as a rotation stop for the cap which has selective positions for setting the ratcheting position of the screwdriver.

Abstract: A wrench includes a wrench body having a ring portion and a handle portion. A retainer that holds a plurality of wedge members is disposed inside the ring portion. Wedge guide grooves are formed on the inner circumferential surface of the ring portion. Each of the wedge guide grooves has a free region which maintains the corresponding wedge member in a free state, and left-hand and right-hand wedge regions each of which maintains the corresponding wedge member in a caught state. The wrench is provided with a changeover mechanism for moving the retainer to a position at which the wedge member faces the corresponding free region, a position at which the wedge member faces the corresponding left-hand wedge region, or a position at which the wedge member faces the corresponding right-hand wedge region.

Abstract: A ratcheting driver for rotationally driving a piece and having a handle and pivotal pawls engageable with a driven gear and being capable of ratcheting and driving in both rotational directions. A cap is rotatable relative to said handle and it has a web for pivoting the pawls out of engagement with the gear. Through the selective rotation of the cap, the setting of the pawls is established. A spring positions the pawls in driving positions, and the cap has surfaces which disengage the pawls from the gear upon rotation of the cap. A method of arranging the driver is included.

Abstract: A selective one-way bit-driving apparatus includes a shaft for connection with a handle, a bit receiver including a plurality of teeth formed on an internal face, two one-way drivers pivotally connected with the shaft and each formed with a plurality of teeth for engagement with the teeth of the bit receiver and a switch installed on the shaft for causing the engagement of the teeth of at least one of the one-way drivers with the teeth of the bit receiver.

Abstract: A socket tool includes a handle and a socket is movably mounted to one of two ends of the handle. A groove and a plurality of notches are defined in the outer periphery of the end of the handle. The socket has two passages defined through a wall of the socket and an angel is defined between each one of the passages and a radius of the socket. A positioning pin extends through the wall of the socket and is engaged with the groove of the handle. The two passages are located at two different longitudinal positions from an end of the socket. A bead and a spring are respectively received in each of the passages, and one of the two beads is engaged with one of the notches by moving the socket on the end of the handle. Each of the two beads engaged with the notch decides the direction that the socket drives an object accommodated in the socket.

Abstract: A ratchet tool includes a seat rotatably secured to a housing and having a number of teeth, a driving stem is engaged in the seat and has an engaging hole to receive a tool member, two pawls are slidably engaged in the housing and biased to engage with the teeth of the seat. A device may selectively disengage the pawls from the teeth of the seat to control a rotational direction of the seat by the housing. The driving stem includes a narrower neck formed in the other end to form a head and to engage with and to drive tool elements. The provision of the narrower neck in the driving stem permits the driving stem to rotate relative to the tool elements.

Abstract: The bi-directional wrench with a ratchet assembly can be used in small space. It includes a handle, a base attached pivotally to the handle, a rotating device mounted on the base and a bi-directional device engaged with the rotating device. The bi-directional wrench with a ratchet assembly can change the effective rotating direction conveniently.

Abstract: A operating device for a screwdriver includes a body partially secured in a handle of the screwdriver, a barrel partially and pivotally received in the body and a controller pivotally mounted on the body for controlling an operated direction of the operating device.

Abstract: A ratchet screwdriver has a body and a driving portion. The body has a handle, a shank integrally formed on the handle, a post with a non-circular periphery pivoted with the shank and a head formed on the post. The driving portion has a spring mounted on the post, a cylinder with a non-circular inner periphery mounted on the post, and a chuck mounted on the head and used for holding the tool head. Because the driving portion of the ratchet screwdriver is longitudinally set on the body, it can reduce whole volume of the ratchet screwdriver to enable the screwdriver to be used in a small place.

Abstract: A ratchet wrench is provided which includes a handle having a head on the handle, a rotatable gear disposed in the head and having ratchet teeth, and a pivotable pawl engaged with the gear to allow ratcheting rotation of the gear in a first direction and prevent ratcheting rotation of the gear in a second direction. An obstruction is engageable with a cam surface at the base of the pawl in order to prevent the pawl from self-reversing.

Abstract: A ratcheting tool driver has a handle and a ratcheting body that includes a plurality of recesses for receiving a plurality of pawls having teeth formed thereon. A cover is axially secured to the ratcheting body and rotates relative to the body over a limited distance. The cover is formed so that it interacts with the plurality of pawls, which are operatively received in the body recesses so that they engage and disengage teeth formed on a socket ring. The socket ring contains a plurality of teeth on its outer circumference, is received in an axial bore formed in the ratcheting body, and operatively engages the pawl teeth.

Abstract: An air brake slack adjusting tool for pushing in the locking collar on a slack adjuster bolt. The air brake slack adjusting tool includes a first elongate member having a handle portion and a slack adjuster portion; and also includes a second elongate member being pivotally attached to the first elongate member and having a handle portion and a support portion; and further includes a ratcheting mechanism being disposed in the slack adjuster portion for engaging a locking collar on an air brake.

Abstract: A ratchet device for a screwdriver includes a body partially secured in a handle of the screwdriver, a barrel partially and pivotally received in the body and a controller pivotally mounted on the body for controlling an operated direction of the ratchet device.

Abstract: A ratchet structure of a screwdriver includes a seat body disposed on a handle, a ratchet mechanism and an outer collar. The seat body has a stop wall projecting therefrom. The stop wall defines a central receiving space and an opening. The seat body has a projecting post at the opening to divide the opening into a left split and a right split. A stem is fitted in the receiving space. The ratchet mechanism includes a left dog and a right dog respectively disposed at the left and right splits. The post is formed with a left and a right projecting section. The middle sections of the left and right dogs are formed with left and right notches in which the left and right projecting sections are respectively cooperatively inlaid. The left and right dogs swing about the projecting sections to disengage from the toothed section of the stem.

Abstract: A unidirectional ratchet wrench essentially comprises a wrench body (10), a ratchet (20), an expending ring (30) and a plurality of clamping blocks (40). The ratchet (20) is rotatably mounted inside the wrench body and has the clamping blocks (40) evenly spaced around the ratchet (20) to engage the wrench body (10), whereby the unidirectional wrench has excellent torsion-resisting efficiency and an endurable extension life.

Abstract: A ratchet screwdriver includes a handle, a main body, a shank, two check plates, a shifter, a position confining plate, and a tubular housing. The check plates are provided with an inclined edge, a reinforcing edge and a protruded edge. The inclined edge is intended to enable the check plates to be effectively actuated by the shifter. The reinforcing edge serves to enhance the structural strength of the check plates. The protruded edge serves to prevent the check plates from displacing. The main body is provided with two protruded ribs to securely position the tubular housing. The position confining plate is provided with two pillars, with one end of the pillars being received in the guided slot of the main body, and with the other end of the pillars being fitted into a recovery spring to enable the position confining plate to return to its original position.

Abstract: A Fast adjustable wrench including a main body and a trigger seat pivotally disposed in the main body and driven by a trigger. The trigger seat can be switched to push an upper link or a lower link. When pulling the trigger, the trigger seat is driven to move forward to push the upper link or lower link forward. The upper or lower link at this time pushes and rotates a rotary member which is disposed at front end of the main body and fitted with a nut or a bolt head. Therefore, the nut or bolt head can be fast wrenched.

Abstract: The invention is an improved ratcheting mechanism having a rotatable wheel with teeth, a shaft to which the wheel is affixed, at least two toggles, each with an arm for engaging a tooth of said wheel and each with an arched structure. The arched structure forms an arch over the shaft. There is also a contact for contacting either toggle to cause the arm of the contacted toggle to disengage from a tooth of the wheel and to allow rotation of the wheel in one rotational direction.

Abstract: The invention is an improved ratcheting mechanism having a rotatable wheel with teeth, a shaft to which the wheel is affixed, at least two toggles, each with an arm for engaging a tooth of said wheel and each with an arched structure. The arched structure forms an arch over the shaft. There is also a contact for contacting either toggle to cause the arm of the contacted toggle to disengage from a tooth of the wheel and to allow rotation of the wheel in one rotational direction.

Abstract: A ratchet screw driver includes a shaft rotatably received in a handle, two follower ratchet gears slidably engaged on and rotated with the shaft, two driving ratchet gears rotatably and slidably engaged on the shaft, and a spring biasing the driving ratchet gears to engage with the follower ratchet gears. A barrel and a ferrule are secured together and rotatably secured to the handle and each has an actuating surface for selectively disengaging the driving ratchet gears from the follower ratchet gears to control the driving direction of the shaft.

Abstract: An apparatus comprising a first handle, a second handle, and a ratchet device is disclosed. The ratchet device has an attachment end and a base. The attachment device is rotatable with respect to the base either clockwise or counterclockwise but not both. The ratchet device has a left side and a right side, and the first handle is connected to the base of the ratchet device at the left side of the base. The second handle is connected to the base of the ratchet device at the right side of the base. The first and second handles can be an elongated bars having a first end and a seconds end. The first handle can be connected at its first end to the left side of the base of the ratchet device while the second handle is connected at its first end to the right side of the base. The first ends of the first and second handles may have extensions. The base of the ratchet device may have a recess on its left side and on its right side.