Abstract: A hub assembly for a human-powered vehicle comprises a hub axle, a first rotatable member, a second rotatable member, and a rotation control structure. The rotation control structure couples the first rotatable member to the second rotatable member to transmit a first input rotation of the first rotatable member to the second rotatable member at a first ratio of a first output rotation of the second rotatable member to the first input rotation of the first rotatable member. The rotation control structure couples the second rotatable member to the first rotatable member to transmit a second input rotation of the second rotatable member to the first rotatable member at a second ratio of a second output rotation of the first rotatable member to the second input rotation of the second rotatable member. The second ratio is different from the first ratio. The second ratio is larger than 0.

Abstract: Disclosed are devices, systems and methods for improving medical instruments and related tools, such as a ratcheting module that can be attached to various surgical instruments used during surgery.

Abstract: A clutch assembly comprises an actuation assembly, an outer ring, and an inner ring disposed radially inward of the outer ring and rotatable about an axis in first and second rotational directions. A first and second strut are rotatably disposed within first and second pockets of the outer ring and configured to be rotated by the actuation assembly. A first pawl and a second pawl are rotatably disposed within a third pocket and a fourth pocket, respectively. For a transition mode, the actuation assembly is configured to rotate the first strut within the first pocket such that rotation of the first strut in the first rotational direction urges the first pawl radially inward into partial engagement with teeth disposed on an outer surface of the inner ring, the second pawl remains free of contact with the inner ring and the inner ring rotates in the first rotational direction.

Abstract: An external tooth type ratchet screwdriver includes a handle and a ratchet head, the handle is provided with a ratchet seat, a first pawl and a second pawl; the ratchet head is of a round-bar shape and passes through the center of the ratchet seat; the middle part of the outer surface of the ratchet head is provided with teeth; one end of the inner circle of the first pawl is provided with a ratchet teeth structure; the second pawl has the same structure with the first pawl; the end surface of the ratchet seat is eccentrically provided with a circle of annular groove, and one end of the annular groove is cut off, and arc-shaped barrier strips are oppositely arranged on a cutoff; installation seats are formed between the wall of the ratchet seat and the arc-shaped barrier strips; a reversing cover is clamped outside the ratchet seat.

Abstract: A bicycle transmission hub includes: a hub shaft to input a rotation force is input, the hub shaft having first pawls arranged on the outer peripheral surface thereof; a transmission controller for controlling the first pawls to appear and disappear; driving gears, each having a ratchet formed on the inner peripheral surface thereof to receive a rotation force by the first pawls, the driving gears having a different number of teeth, the hub shaft extending through the center of each driving gear; driven gears engaged with the driving gears, respectively, having a different number of teeth, and rotating; an output wheel rotating while being coupled to a driving gear adjacent thereto among the driving gears and having a second pawl disposed on the outer peripheral surface thereof; and a hub shell having a ratchet formed on the inner peripheral surface thereof to receive a rotation force by the second pawl.

Abstract: A ratchet screwdriver includes a mounting seat, a control member, a driving shaft, two pawls and two springs. The mounting seat has a receiving space, a first slot and a second slot. A passage is defined through the mounting seat. The first and second slots have a hole respectively. The driving shaft has a ratchet portion located in the receiving space. Each pawl is biased by one spring so as to be engaged with the ratchet portion. The control member is rotatably mounted to the mounting seat and the driving shaft. The control member has two control plates to pivot the pawls to disengage from the ratchet portion of the driving shaft.

Abstract: A ratchet wrench includes a body, a ratchet wheel rotatably and movably mounted in the body, and a pawl slideably received in the body and engaged with the ratchet wheel. The body is extended along a first longitudinal axis, and the ratchet wheel is extended along a second longitudinal axis. The ratchet wrench is operable between a first position and a second position. When the ratchet wrench is in the first position, the first and second longitudinal axes are collinear. When the ratchet wrench is operated to withstand a torque load and to move from the first position to a second position, the first and second longitudinal axes are parallel to each other.

Abstract: A selectively one-way wrench includes a head, a rotor, a pawl assembly, a switch, a connecting element and an auxiliary element. The pawl assembly includes two pawls. The switch is operable to disengage one of the pawls from the rotor and engage the other pawl with the rotor via the connecting element. The auxiliary element is used to tightly press one of the pawls against the rotor at a time.

Abstract: A ratchet wrench includes a driving device. A compartment extends through the driving device. A drive member is received in the compartment. A ledge is formed on an inner periphery of an end of the compartment. A pressing rod extends into the drive member via the end of the compartment. The pressing rod is movable relative to the drive member along a rotating axis between a first position and a second position to control engagement with or detachment from a tool. A dustproof ring is mounted between the ledge and the pressing rod. The dustproof ring includes an outer side pressing against an abutment portion of the ledge and an inner side-pressing against the pressing rod wherever the pressing rod is in the first position and the second position.

Abstract: A ratchet wrench includes a head having a first room for receiving a driving member, and a second room for receiving a pawl. Two recesses are defined in the inner periphery of the second room. A tip portion is located between the two recesses. The tip portion passes through the two respective centers of the first and second rooms. The pawl is controlled by a bolt and a lever. A spring and a contact member are received in a positioning hole in the rear side of the pawl. The contact member is biased by the spring and engaged with one of the two recesses to push the pawl to be engaged with the driving member. The contact member is restricted between one of the two recesses and the positioning hole so as to bear a large torque.

Abstract: A ratchet driving mechanism for a hand tool includes: a drive unit, including a drive shaft, a position member and a plurality of latch members, wherein each of the latch members includes a latch plate and an elastic piece; an adjustment ring, sleeved on the drive shaft and formed with a plurality of cavities allowing the position member to be selectively latched and positioned and an accommodation slot allowing each of the latch plates to inwardly/outwardly move; and a ratchet unit, sleeved on the drive shaft and formed with a plurality of ratchet teeth allowing each of the latch plates to be engaged. Accordingly, during the drive shaft driving the ratchet unit for generating rotation, the position member is able to precisely position the ratchet unit on drive shaft.

Abstract: A ratchet wrench actuator structure has a head part and a shank part, said head part has a first accommodation section, a second accommodation section, and a third accommodation section; a ratchet member is positioned in said first accommodation section; a clamping piece is disposed in said second accommodation section; a change-over switch has at least one driven part disposed in said third accommodation section; and a resisting spring has a front resisting part, a middle resilience part, and a rear resisting part.

Abstract: An over-running clutch couples a motor driven shaft to a driven element in which the element can freely rotate when the motor is switched off. The driven shaft of the clutch includes a flattened portion with two flat surfaces. A wall of a coupling member engages one of the surfaces when the driven shaft stands still. The coupling member includes an outwardly extending cam which is received in a sleeve of a cylindrical collar positioned on a disk which is rotatably mounted on the driven shaft. When the shaft is rotated, the coupling member is pressed outward over a limited distance and the cam enters a recess provided in the inner wall of a cylindrical drive portion forming part of the driven element.

Abstract: A ratchet screwdriver includes a mounting seat, a fixing ring, a control member, a driving shaft, four pawls and four springs. The mounting seat has a space, two first slots and two second slots. A passage is defined through the mounting seat. The first slots each have a first hole and the second slots each have a second hole. The driving shaft has a ratchet portion located in the space. The four pawls are biased by the four springs so as to be engaged with the ratchet portion. The fixing ring is connected to the mounting seat and the four pawls are pivotably connected to the fixing ring. The control member is rotatably mounted to the mounting seat and the driving shaft. The control member has two control plates to pivot the pawls to disengage from the ratchet portion of the driving shaft.

Abstract: A ratchet wrench including a holding portion, a neck portion, a switching member, a controlling rod, a blocking member, and a ratchet driving head is disclosed. The neck portion which is located at the top end of the holding portion has a cavity. The cavity has a first recess and an opening. The first recess is used for receiving a compressible elastic member and a ball. The opening is used for receiving and tightly fitting with a bendable elastic member. The switching member has a second recess to hold the bottom of the bendable elastic member, and the switching member has two adjacent arc grooves at its bottom. The controlling rod links the switching member to shift the switching member in the cavity to allow the ball to be pressed into one of the arc grooves. The controlling rod can be applied to shift, rotate or both shift and rotate the switching member in the cavity.

Abstract: A three-mode direction-changeable ratchet wrench of the present invention includes a main body, a ratchet member, a ratchet mechanism, a switch mechanism having a toggle piece, and a restriction element. The main body includes a head portion and a handle, and the ratchet member is rotatably disposed to the head portion. The ratchet mechanism includes a first pawl, a second pawl, a first elastic element, and a second elastic element. The switch mechanism is disposed on the head portion. The restriction element is disposed on one of the main body and the switch mechanism and is movable between a restrict position and a release position. Thereby, the restriction element is able to alternatively restrict the toggle piece.

Abstract: A ratchet tool includes a tool head provided with a plurality of ratchet teeth on an inner peripheral surface, a drive body having an outer surrounding surface confronting the ratchet teeth, and a guiding slot for receiving first and second pawls and a biasing member to permit the pawls to be displaced between extending and retracted positions, and an actuator twistable relative to the head and having two inner boundary contours to define two recessed regions to accommodate displaceable engagements of keys of the pawls with the inner boundary contours. The pawl end is configured to extend along an entire axial length of the drive body so as to be fully engaged with the ratchet teeth in the engaging position, thereby permitting transmission of a relatively large torque during rotation of the tool head.

Abstract: A driving end of a tool includes a body including a chamber and a bore. The chamber includes first and second pawls disposed therein. A first engaging member is rotatably disposed in the chamber and defines a first engaging section with a plurality of teeth. A second engaging member is rotatably disposed in the chamber and defines first and second engaging areas. The first engaging section is engaged with the first engaging area. The first and second engaging areas are selectively engaged with the first and second pawls. A switch includes an activating member inserted through the bore and received in the second engaging member and operably rotatable to first and second positions selectively.

Abstract: A quick-turn wrench includes a driving head with an axle hole. One side of the axle hole has a claw. A ratchet ring is accommodated in the axle hole. One end of the ratchet ring extends outside the axle hole and connects to a wrench handle. The ratchet ring is surrounded by a ratchet part that correspondingly engages the claw. A transmission rod is inserted into the ratchet ring, with one end having a transmission part. A bottom plate is disposed at the bottom of the axle hole. The end surface of the bottom plate facing the axle hole has a sliding groove. A pushing element is disposed in the sliding groove corresponding to the claw. The transmission part of the transmission rod connects to the pushing element. As the transmission rod rotates, the pushing element is driven to push the claw to release the fixing state between the claw and the ratchet ring.

Abstract: A compact, three-way ratchet drive mechanism selectively enables ratcheting operation in a clockwise direction, or an anti-clockwise direction, or disables ratcheting behavior. The mechanism includes a ratchet housing, a drive shaft, a ratchet wheel, J-shaped pawls, and a coaxially fitted selector sleeve for selecting a desired mode of operation.

Abstract: Provided is a novel handle device that encloses a ratcheting mechanism that a user can easily control and operate using only one hand by employing conveniently located push button ratchet controls situated at the opposing lateral surface ends of the handle.

Abstract: A ratchet wrench includes a drive member rotatably received in a body that includes a compartment extending from a first side toward and spaced from a second side of the body. A control member is pivotable between three operative positions to change the driving direction of the ratchet wrench. The control member includes a first end pivotably coupled to the drive member and a second end covering the compartment. The control member includes a control section selectively engaged with two pawls slideably received in the compartment and releasably engaged with teeth of the drive member. When the control member is in a second operative position, the pawls are engaged with the teeth of the drive member, allowing a handle of the body and the drive member to rotate in either of two directions driving the fastener, and not allowing free rotation of the handle relative to the drive member in either of the two directions without driving the fastener.

Abstract: A selectable one-way clutch includes a strut plate co-annular to a slide plate and a notch plate. The selectable one-way clutch is configured to transfer torque between a strut plate and a notch plate in a first direction when a displacement actuator moves a pin and a slide plate to a first position. The selectable one-way clutch is configured to disengage the strut plate from the notch plate when the displacement actuator moves the pin and the slide plate to the second position.

Abstract: The invention relates to a load-torque lock (10) for automatic locking of load-side torques in the event of a drop or discontinuation of a drive-side torque, comprising a housing (11) which is fixed to a chassis and axially oriented means of attack (19), an output shaft (34) and axially oriented means of attack (37) and pivotally mounted clamping bodies (24) which are arrested or clamped by load torques on the housing (11) and are cancelled out by drive-sided torques from the housing bore. In order to obtain a powerful, robust and compact load-torque lock, the means of attack (37) of the output shaft (34) are arranged such that they cooperate with the means of attack (19) of the drive shaft (17) in the event of drive-side torques and cooperate with the clamping bodies (24) in the event of output-side torques.

Abstract: A ratchet mechanism for a ratchet tool includes a pawl received in a recess of the head and biased by a bead which is biased by a spring received in a notch defined in an inner periphery of the recess. The pawl has a toothed surface which is matched with outer threaded surface of a driving wheel which is rotatably received in a through hole of the head. A receiving hole is defined through the pawl and opens a top surface of the pawl. A peripheral groove is defined radially outward in an inner periphery of the receiving hole. A shift member has a top board and a rod which extends from an underside of the top board, a stop is connected to a distal end of the rod. The stop and the rod are inserted into the receiving hole and the stop is movably engaged with the peripheral groove.

Abstract: A ratchet driving mechanism includes a main body, an adjusting ring, and a ratchet wheel. The main body includes a grip-connecting member and a rotary seat connected fixedly to the grip-connecting member. The rotary seat is formed with two parallel insertion slots, in each of which two pawls are biased by a spring to move away from each other. The adjusting ring and the ratchet wheel are sleeved rotatably on the rotary seat. When the adjusting ring is disposed in an anchoring position, the pawls engage the ratchet wheel so as to prevent rotation of the ratchet wheel on the rotary seat. When the adjusting ring is disposed in a first-direction position or a second-direction position, two of the pawls engage the ratchet wheel so as to allow for rotation of the ratchet wheel on the rotary seat in only a corresponding direction.

Abstract: The present invention provides rotary positioning structure of the ratchet screwdriver. The rotary positioning structure includes two radial grooves, penetrating radially between the body of the ratchet screwdriver and the central axle hole. There are two -shaped snappers having a transverse rack and two vertical racks, and each is mounted separately into two radial grooves. The two vertical racks are inserted into two vertical slots. The transverse rack is placed opposite to the top flange of gear of the shaft lever. A flexible locker is used to press down the two -shaped snappers. A rotating drum is mounted and limited externally onto the body, while two troughs are arranged at intervals onto an inner wall of the retaining block opposite to the lower rivet holder, thereby forming a rotary positioning structure and offering a higher stability of positioning and ease-of-operation.

Abstract: A high-strength ratchet structure for ratchet wrench is disclosed to include a driving block with two transverse sliding grooves, two pairs of directional block members respectively movably mounted in the sliding grooves of the driving block, two spring members respectively mounted in the sliding grooves and supported between the associating directional block members, a ratchet member coupled to the driving block, and a direction control ring selectively set in a first position where the ratchet member is locked to the driving block, a second position where the ratchet member is prohibited from clockwise rotation relative to the driving block and allowed for counter-clockwise rotation relative to the driving block, or a third position where the ratchet member is prohibited from counter-clockwise rotation relative to the driving block and allowed for clockwise rotation relative to the driving block.

Abstract: A ratchet tool includes a handle, a tooling sleeve, a first pawl, a first elastic member, a second pawl, a second elastic member, a retaining ring, and a dialer. The outer circumference of the tooling sleeve received in the handle is disposed with teeth. The pawls and the elastic members are contained in the handle. Each of the pawls is disposed with teeth and a post. The retaining ring covers up the pawls and the elastic members and is secured to the handle. The dialer is pivoted to the retaining ring to change work direction of the tooling sleeve by moving the pawls as driven by the posts linked to the dialer when the dialer is turned to either side.

Abstract: There is provided a power coupling device comprising first and second coupling members, at least one of which is capable of rotating about a common axis and relative to each other. The first coupling member has a pocket, and the second coupling member has notches. The power coupling member also comprises first and second struts arranged at least partly in the pocket. Each of the first and second struts is urged to emerge from the pocket and capable of engaging with one of the notches. The first strut is capable of transmitting torque between the first and second coupling members only in a first direction, and the second strut is capable of transmitting torque between the first and second coupling members only in a second direction that is opposite to the first direction.

Abstract: A ratchet tool includes a handle, a tooling sleeve, a first pawl, a first elastic member, a second pawl, a second elastic member, a retaining ring, and a dialer. The outer circumference of the tooling sleeve received in the handle is disposed with teeth. The pawls and the elastic members are contained in the handle. Each of the pawls is disposed with teeth and a post. The retaining ring covers up the pawls and the elastic members and is secured to the handle. The dialer is pivoted to the retaining ring to change work direction of the tooling sleeve by moving the pawls as driven by the posts linked to the dialer when the dialer is turned to either side.

Abstract: A ratchet tool includes a barrel rotatably engaged into a cartridge and having a gear, two pawls slidably received in the cartridge and each having a base plane and a side plane and two or more teeth biased to engage with the gear of the barrel, and a control ferrule may control the engagement of the pawls with the gear of the barrel. The teeth of the pawls each includes two tooth surfaces having different included angles relative to the base plane of the pawl and relative to the side plane of the pawl, and having different included angles relative to each other, for allowing the barrel to be suitably rotated or driven by the cartridge with an increased driving torque.

Abstract: A ratchet structure of a wrench includes a handle, a socket, a first detent, a first elastic element, a second detent, a second elastic element, a lid and a knob. The outer periphery of the socket is formed with gear teeth. The socket is accommodated in the handle. The first and second detents and the first and second elastic elements are also accommodated in the handle, respectively. Each of the first and second detents is provided with gear teeth and a stud. The lid is secured to the handle and covers the detents and the elastic elements. The knob is pivotally connected to the handle. By turning the knob, the studs are linked to turn to change the turning direction of the socket.

Abstract: A reversible ratchet-type wrench includes a handle and a head extended from the handle and having a hole. A web is defined between the handle and the head, and a cavity is defined in the web and communicated with the hole. The web further includes a compartment having a first end communicated with the cavity and a second end communicated with outside, thereby leaving a bridge in the web. A drive member is rotatably mounted in the hole of the head. A pawl is mounted in the cavity and includes a first side with ratchet teeth for releasably engaging with teeth on an outer periphery of the drive member. A switch member includes a turn-piece for manual operation and an actuating plate extended from the turn-piece and rotatably received in the second end of the compartment of the head. The switch member is switchable between two positions for changing ratcheting direction of the drive member.

Abstract: A ratchet tool includes a tool member rotatably engaged into a cartridge and having a gear, two pawls slidably received in the cartridge and each having one or more teeth biased to engage with the gear of the tool member, and a control ferrule may control the engagement of the pawls with the gear of the tool member, and the pawls each include a ball, a roller, or a rounded or rotary or smooth member engaged between the control ferrule and the pawls, for forming a reduced contact area between the control ferrule and the smooth member, and for allowing the pawls to be effectively moved relative to the cartridge, and to be disengaged from or to be engaged with the gear of the tool member by the control ferrule.

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 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 handle and an annular head formed on the handle. The annular head defines a first space, a second space in communication with the first space and a third space in communication with the second space. An annular gear is positioned rotationally in the first space. In the second space is a direction controller including two pawls and a spring between the pawls. Partially in the third space is a direction switch for engaging selective one of the pawls with the annular gear. The direction switch defines a recess. On the annular head is a spring-biased rod detent for automatic insertion into the recess after the direction switch is moved partially in the third space, thus locking the direction switch to the annular head while allowing the rotation of the direction switch on the annular head.

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 tool coupling device including a seat body, a ratchet locating mechanism and a transmission member disposed in the seat body. The ratchet locating mechanism has a controlling disc and a working stem projecting from the controlling disc. One end of the working stem has a first stopper block. A second stopper block is connected with the working stem next to the first stopper block. A pair of radially symmetric controlling keys are connected with the working stem next to the second stopper block. The controlling keys serve to drive two chucking pins disposed in the transmission member to move up and down so as to achieve ratchet effect. Therefore, the rotational direction of the tool can be changed.

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 selective one-way wrench includes a head, a spring-biased detent, a pawl, a gear, a transmission element and a switch. The head defines a circular space with a reduced open end, a crescent space communicating with the circular space and a hole communicating with the crescent space. The transmission element includes a protrusion formed on a lower face thereof and a cutout. The transmission element is located in the circular space while the cutout is exposed to the exterior through the reduced open end of the circular space. The spring-biased detent is located in the hole. The pawl includes a plurality of teeth, a groove and a recess. The gear is located in the circular space and the teeth engage the pawl.

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 selective one-way wrench includes an annular head defining a first space, a second space communicated with the first space and an aperture communicated with the second space. A gear is rotationally put in the first space and includes a toothed face. A pawl is put in the second space and includes a toothed face engaged with the toothed face of the gear and two concave faces. A transmission is rotationally put in the second space and includes two wings selective one of which is in contact with corresponding one of the concave faces of the pawl. A switch is put into the second space through the aperture for connection with the transmission. A spring is connected between the pawl and the transmission.

Abstract: A selective one-way wrench includes an annular head, a gear, a pawl, a transmission and a switch. The annular head defines a first space, a second space communicated with the first space and an aperture communicated with the second space. The gear is rotationally put in the first space. The gear includes a toothed face. The pawl is put in the second space. The pawl includes a toothed side for engagement with the toothed face of the gear. The transmission is rotationally put in the second space. The transmission includes three protrusions selective one of which is put between the rods of the pawl so that the transmission can move the pawl. The switch is put into the second space through the aperture for connection with the transmission.

Abstract: A ratchet tool includes a head with an engaging member rotatably received in a hole in the head and a recess is defined in an inner periphery of the hole so as to receive a pawl therein. A chamber is defined in a side of the head and communicates with the recess. A knob is rotatably received in the chamber and a biasing member is connected between the pawl and the knob. The biasing member is a V-shaped member and includes two insertions which are connected to a side of the pawl, and a peak portion which is securely connected to a protrusion extending eccentrically from an inside of the knob. The pawl is shifted by the biasing member when rotating the knob.

Abstract: A ratchet device comprises a control body, a ratchet body, and a ratchet shifter. The control body is provided with two sets of arresting members symmetrical to each other. The ratchet body is provided with a toothed portion which is engaged with two of the four arresting members at the time when the control body is turned clockwise or counterclockwise, thereby resulting in enhancement of torsion and stability of the ratchet body. The tooth number of the toothed portion of the ratchet body can be so increased as to enhance maneuverability of the ratchet device, without compromising the torsion of the ratchet body.

Abstract: Ratchet socket for fitting onto a screwed member. The ratchet socket is drivable by a tool to wrench the screwed member. The ratchet socket includes: a cylindrical main body formed with at least one internal circular hole and at least one through hole formed on the circumference of the main body and communicating with the circular hole; and a ratchet mechanism including a ratchet wheel rotatably disposed in the circular hole, a dog member movably accommodated in the through hole and a resilient hoop fitted around the main body to exert a resilient force onto the outer side of the dog member, keeping the dog member resiliently engaged with the ratchet wheel. When the dog member is engaged with the ratchet wheel, the ratchet mechanism provides a ratchet effect and the main body of the socket is one-way drivingly engaged with the ratchet wheel.

Abstract: A ratchet driver having a ratchet control assembly and a driver assembly rotatable relative to the ratchet control assembly. A ratchet sleeve operatively connected to the driver assembly and having inwardly facing first and second control openings. The ratchet control assembly having first and second slots, having first and second stop slides, respectively, mounted therein. Moving mechanism to move the stop slides within the first and second control openings, respectively, stop slide control mechanism movable to a position to move said first stop slide out of the first control opening and allow the second stop slide to be in the second control opening and to move stop slide control means to a position to move the second stop slide out of the second control opening and allow the first stop slide to be in the first control opening, and to move the stop slide control means to a position to allow the first and second stop slides to be in the first and second control openings.

Abstract: A pawl controlling device for a ratchet tool includes a selection member movably connected to the tool and having a through hole in which a bead, a biasing piece and a spring are received, wherein the spring is located between the bead and the biasing piece. The bead is engaged with one of two positioning recesses defined in the slot in which the selection member is received, and the biasing piece is engaged with one of two concavities defined in a side of the pawl which is matched with the engaging member. The pawl is shifted to have one of two ends thereof contacting against an inside of the recess for receiving the pawl.