| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 081630200 | Single pawl | 42 |
| 20080223180 | Ratchet mechanism for ratchet tool - 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. | 09-18-2008 |
| 20090038444 | Wrench - A wrench includes a body having a shorter first section with a compartment and a longer second section. First and second plates are respectively mounted to two sides of the first section. A drive member is rotatably received in mounting holes in the plates and the compartment. The first plate is sandwiched between the first section and a flange on an end of the drive member. A retainer is coupled with a coupling portion on the other end of the drive member to rotatably retain the drive member in place and to secure the first and second plates and the body together. A pawl is slideably received in the compartment and includes a toothed section biased by an elastic element to engage with an annular toothed portion of the drive member. The first and second plates and the body have aligned fixing holes through which a fastener extends. | 02-12-2009 |
| 20090205467 | Ratcheting head with internal self-locking adapter related applications - A ratcheting assembly for a tool comprising a housing, a gear supported by a hollow shaft located in the housing and a pawl to engage the gear. A ring in contact with the housing allows adjustment of the ratcheting assembly. The assembly can the releasably lock the tool within the ratcheting assembly by way of a locking mechanism located within the shaft. The assembly further has a compressible collar that will be used to release the tool from the ratcheting assembly. | 08-20-2009 |
| 20090241741 | VEHICLE AND CARGO TRANSPORT RATCHETING TIE DOWN APPARATUS AND SYSTEM - A ratcheting tie down apparatus and system. Exemplary embodiments include a ratcheting tie down system, including a ratchet assembly affixed to an end of a tie down shaft having a longitudinal axis, a pawl mechanism coupled to the ratchet assembly, wherein the ratchet assembly includes a ratchet gear, a ratchet head coupled to the ratchet gear, wherein an inner face of the ratchet gear is positioned in opposition to and in mechanical contact with an inner race of the ratchet head, and wherein the ratchet gear, the ratchet head and the shaft are configured to rotate as a single integral unit when rotated in a forward direction about the longitudinal axis, and the ratchet head is configured to rotate with respect to the ratchet gear and the shaft when the ratchet head is rotated in a reverse direction about the longitudinal axis. | 10-01-2009 |
| 20100043604 | RATCHET WRENCH HAVING EASILY ASSEMBLING STRUCTURE - The present invention discloses a ratchet wrench, which comprises a main body, a D-head, a threaded portion, a loose ratchet, a cardioid spring having extension leg and a closed tip, a rotatable disc having a shouldered hole with a first penetrating hole and a second penetrating hole connected by a connecting hole, and a ring. The rotatable disc is disposed on the head portion of the main body with the threaded portion of the D-head moving from the second penetrating hole and finally extending through the first penetrating hole, and a shift pin is defined at the bottom of the rotatable disc locating in the internal of the closed tip of the cardioid spring. The ring is disposed in the shouldered hole and threadedly engaged with the threaded portion so that the D-head rotatably positioned in the through bore of the main body. | 02-25-2010 |
| 20100064858 | Adjustable ratchet wrench - An adjustable ratchet head assembly has first and second jaw members that are connected using a pinion shaft and a cogwheel shaft. The pinion shaft has oppositely threaded end portions that engage oppositely threaded pinion shaft receiving bores in a central section of each jaw member. The cogwheel shaft has oppositely threaded end portions that engage oppositely threaded cogwheel shaft receiving bores in a proximate end of each jaw member. A pinion gear is concentric with and engages the pinion shaft. A cogwheel gear is concentric with and engages the cogwheel shaft, and is in driving engagement with the pinion gear. Driving the cogwheel gear will cause rotation of the cogwheel shaft, pinion gear and pinion shaft, and will cause the jaw members to move toward or away from each other. The ratchet head assembly is received in a cylindrical ratchet head body, which is received in a handle assembly. | 03-18-2010 |
| 20100170367 | Ratchet Wrench with Prevention of Tooth Damage - A ratchet wrench includes a drive member and a switch rotatably received in a body. A pawl is movably received in the body and has first and second sides. The second side of the pawl includes a pressing portion having upper and lower sections. The pressing portion further includes two pressing sections. Two positioning units are mounted between the switch and the second side of the pawl. The positioning units press against the upper and lower sections to bias the first side of the pawl to engage with the drive member. The positioning units press against one of the pressing sections corresponding to one of two positions of the switch. | 07-08-2010 |
| 20100186555 | Dustproof Ring for Ratchet Wrench - A ratchet wrench includes a head rotatably receiving a drive member. The head includes an end wall having a hole. One of an inner face of the end wall and an end face of the drive member defines a first abutment face. The other of the inner face and the end face includes an annular groove having a bottom wall defining a second abutment face. A dustproof ring is mounted and compressed in the annular groove. The dustproof ring in an uncompressed state has a natural maximum height along a rotating axis of the drive member larger then a spacing between the first and second abutment faces. The dustproof ring includes three sealing units along a radial direction perpendicular to the rotating axis. Each sealing unit has a thickness along the rotating axis smaller than the spacing. | 07-29-2010 |
| 20100242685 | Ratchet wrench capable of preventing disengagement of nut - A ratchet wrench includes a wrench body having a through hole, a driving member rotatably mounted in the through hole and having a center hole for engagement with a nut, and a block ring capped on the driving member and having a stop flange to retain the nut in the center hole such that the nut is unable to drop out of the center hole of the driving member when the nut is tightened or loosened by the ratchet wrench. | 09-30-2010 |
| 20100263496 | RATCHET WRENCH - A ratchet wrench includes a body, a ratchet wheel, a control unit, and a rotary knob. The body has an end forming a ratchet wheel bore and a receiving hole, which respectively and rotatably receive the ratchet wheel and the rotary knob therein. A channel is defined in the body between the ratchet wheel bore and the receiving hole for receiving therein the control unit. The control unit includes two detent blocks and a spring. The detent blocks are selectively engageable with teeth formed in the ratchet wheel. The rotary knob retains a control bar and a positioning ball. The receiving hole has an inner circumferential wall in which two positioning notches are defined. The control bar is operated to move the detent blocks to desired positions and the positioning ball is biased by a spring into selective engagement with the positioning notches for proper positioning of the detent blocks. | 10-21-2010 |
| 20110094351 | REDIRECTION STRUCTURE OF RATCHET WRENCH - An improved redirection structure of a ratchet wrench is disclosed. A driving head accommodates a connector body that has a knob. The accommodating room of the connector body accommodates a brake block with a notch. The urging element of the knob urges against the brake block in the notch. | 04-28-2011 |
| 20110174118 | GEAR UNIT AND MOLDING METHOD OF THE SAME AND APPLIED RATCHET WHEEL WRENCH - A gear unit applies to engaging a ratchet wheel for co-operation, wherein the body material of the gear unit is chose high-density steel through heat processing for enhancing hardness, such as medium carbon steel, high carbon steel, or alloyed steel, and made through continuous multiple cold forging and punching and heat processing; the gear body of the gear unit includes a junction matching the ratchet wheel profile and forming an external tooth through cold forging and punching, and the tooth shape matches the ratchet tooth of the ratchet wheel to engage the ratchet wheel; by way of using the special steel through the process of continuous cold forging and punching and heat processing, the internal structure of the gear unit is dense compaction, so as to improve the mechanical properties, thus the ratchet wheel wrench using the gear unit will have excellent operating performance and long service life. | 07-21-2011 |
| 20110239829 | RATCHETING WRENCH - A ratcheting wrench having ratchet structure, a ratchet body, a socket wheel, a plurality of ratchet teeth and at least one pawl. The ratchet body is received into the ratchet structure and is rotatable about a first axis. The socket wheel is received in an aperture in the ratchet body and includes a plurality of tool members that are spaced circumferentially apart from one another about a second axis that intersects the first axis but is not coincident with the first axis. The ratchet teeth and the at least one pawl cooperate to control relative rotation between the ratchet structure and the ratchet body about the first axis. | 10-06-2011 |
| 20110290084 | RATCHETING SOCKET WRENCH AND SOCKETS - A wrench for action on a work piece is provided. The wrench is a box end socket wrench. The socket wrench has an elongated handle with a box head. The box head has a top and a bottom surface and an inner wall defining an inner aperture. The inner wall is shaped to receive the work piece and has a receiving groove spaced apart from the top surface of the box head to receive a biased member. The biased member extends into the inner aperture of the box head to releasably secure the work piece. When the work piece is inserted in the inner aperture of the box head, the work piece sits flush with the corresponding top and bottom surface of the box head of the wrench. | 12-01-2011 |
| 20110308359 | Dustproof Device for Ratchet Wrench - A ratchet wrench ( | 12-22-2011 |
| 20120031240 | Ratchet Wrench - A ratchet wrench including a holding portion, a neck portion, a driving block, a controlling rod, a shifting lever, and a gear wheel 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 driving block has a second recess to hold the bottom of the bendable elastic member, and the driving block has two adjacent arc grooves at its bottom. The controlling rod to links the driving block to shift the driving block 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 driving block in the cavity. | 02-09-2012 |
| 20120055291 | RATCHET WRENCH - A ratchet wrench has a through cavity in which a reversing lever is disposed. The reversing lever has a pair of protruding lips formed thereon opposite from one another. A cooperating ledge is formed on the head in the cavity and on the pawl which is adjacent to the reversing lever. A spring-loaded pusher is disposed longitudinally in a blind bore in the reversing lever and the pusher engages a pocket in the pawl. A cover plate is disposed on a shelf recessed on the bottom of the wrench and spaced apart from the reversing lever. | 03-08-2012 |
| 20120210829 | RATCHET WRENCH CAPABLE OF PREVENTING DISENGAGEMENT OF NUT - A ratchet wrench includes a wrench body having a through hole, a driving member rotatably mounted in the through hole and having a center hole for engagement with a nut, a pawl, a positioning device, a magnetic ring mounted on a top side of the driving member, and a block ring capped on the driving member and having a stop flange in contact with a top side of the magnetic ring. The magnetic ring is used to retain the nut in the center hole such that the nut is unable to drop out of the center hole of the driving member when the nut is tightened or loosened by the ratchet wrench. | 08-23-2012 |
| 20130014613 | WrenchAANM Adams; StephenAACI MercedAAST CAAACO USAAGP Adams; Stephen Merced CA USAANM Baer; FrankAACI MercedAAST CAAACO USAAGP Baer; Frank Merced CA US - A wrench for rotating a drive member such as a socket, the wrench having a housing including a head portion and a handle portion, the head portion having an inner peripheral wall defining an internal cavity; a set of drive teeth circumscribing the inner peripheral wall of the head portion of the housing and extending into the internal cavity; a drive gear disposed within the internal cavity of the head portion of the housing; a socket engaging drive member connected to the drive gear and extending outwardly from the head portion of the housing; a set of opposition gears disposed within the internal cavity of the head portion of the housing, the opposition gears being disposed between and interconnected with the drive gear and the drive teeth; and an operating assembly carried by the housing and operably associated with the drive gear, the operating assembly including a novel quick turn mechanism for controllably changing the operating mode of the wrench from a tightening mode to a loosening mode. | 01-17-2013 |
| 20130047791 | STRUCTURE OF SOCKET WRENCH - A structure of socket wrench includes a wrenching bar having opposite ends of which at least one forming a head. The head and the wrenching bar form an included angle between side-view axes thereof and between top-view axes thereof. The head receives therein a direction-selectable ratchet assembly that includes a driving member. The driving member includes a rotor that is rotatably received in the ratchet assembly. The rotor has a circumference forming at least two socket sections that each have an axis perpendicular to a rotational axis of the rotor. A user may directly turn the rotor to select a desired one among the socket sections of different specifications. Further, the included angles arranged between the wrenching bar and the head allow easy hand gripping and application of force by the user so as to improve the convenience of use. | 02-28-2013 |
| 20130061722 | Two Handle Socket Wrench System - A dual handle socket wrench system provides torque generated by two-handed operation. Bolts and other fasteners are removed with greater ease as a wrench operator may use two hands to turn a fastener. | 03-14-2013 |
| 20130139656 | RATCHET WRENCH CAPABLE OF PREVENTING DISENGAGEMENT OF NUT - A ratchet wrench includes a wrench body having a through hole, a driving member rotatably mounted in the through hole and having a center hole for engagement with a nut, a pawl, a positioning device, a magnetic ring mounted on a top side of the driving member, and a block ring made of non-magnetic material capped on the driving member and having a stop flange in contact with a top side of the magnetic ring. The magnetic ring is used to retain the nut in the center hole such that the nut is unable to drop out of the center hole of the driving member when the nut is tightened or loosened by the ratchet wrench. | 06-06-2013 |
| 20130213190 | RATCHET WRENCH WITH A BUSHING - A ratchet wrench includes a wrench head, a ratchet assembly and a bushing. The wrench head is made of metal and defines a cavity therein. The ratchet assembly is disposed in the cavity of the wrench head and has an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head. The bushing is made of a metal with a hardness greater than that of the wrench head and is fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head. Moreover, the bushing has a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity. | 08-22-2013 |
| 20130283983 | Ratchet Wrench - A ratchet wrench is configured as a double-ended and reversible bolt-through wrench configured to actuate four different fastener sizes. The wrench can include socket hubs that can be provided in high-visibility colors to provide easy identification by the user. The socket hubs can include extension portions which extend beyond the respective faces of the handle to provide adequate contact between the socket hubs and a target fastener. Each socket hub includes a corresponding rotational direction controller or shifter that allows the socket hub to reverse it direction of rotational actuation relative to a fastener. | 10-31-2013 |
| 20130291689 | RATCHET WRENCH - A ratchet wrench has a through cavity in which a reversing lever is disposed. The reversing lever has a pair of protruding lips formed thereon opposite from one another. A cooperating ledge is formed on the head in the cavity and on the pawl which is adjacent to the reversing lever. A spring-loaded pusher is disposed longitudinally in a blind bore in the reversing lever and the pusher engages a pocket in the pawl. A cover plate is disposed on a shelf recessed on the bottom of the wrench and spaced apart from the reversing lever. | 11-07-2013 |
| 20140013904 | RATCHETING PALM GRASPABLE MULTI-SOCKET WRENCH - A ratcheting palm graspable multi-socket wrench. The wrench includes a socket body portion and a ratcheting mechanism. The socket body portion has socket portions with socket openings, arranged around a perimeter of the socket body portion. A through hole passes through from the top surface to the bottom surface of the socket body portion. The ratcheting mechanism fits into the through hole of the socket body portion. The ratchet mechanism has an elongate shaft with a ratchet switch located at a first end, and a square socket adaptor located at an opposite, second end. The ratchet switch and adaptor are both accessible from outside of the socket body portion. The ratchet switch will selective allow either clockwise or counter-clockwise twisting of the socket body portion to drive the adaptor either clockwise or counter-clockwise, with the other direction being freewheeling, thereby providing a switching ratcheting function. | 01-16-2014 |
| 20140020519 | RATCHET WRENCH - A ratchet wrench includes a wrench body and a ratchet rotatably mounted in a ratchet hole of the wrench body and provided with one end protruding out of the ratchet hole for connection of a driving wheel. Thus, a user can rotate the driving wheel to force the rotation of the ratchet, such that a screw nut accommodated in the ratchet can be secured or loosened quickly and conveniently. | 01-23-2014 |
| 20140060259 | Ratchet Wrench with Dustproof Structure - A ratchet wrench includes a driving device having first and second sides spaced along a rotating axis. A compartment extends from the first side through the second side. A drive member is received in the compartment and includes an end for driving a tool. A ledge is formed on an inner periphery of an end of the compartment at the second side. A pressing rod extends into the drive member via the end of the compartment at the second side. The pressing rod is movable relative to the drive member along the rotating axis to control engagement with or detachment from the tool. A dustproof ring is mounted between the ledge and the pressing rod. The dustproof ring includes an outer side and an inner side. The outer side presses against an abutment portion of the ledge. The inner side presses against the pressing rod. | 03-06-2014 |
| 20140102260 | AUTO-SHIFT REVERSING MECHANISM - A device that automatically actuates the reversing lever of a ratchet mechanism when the radial direction of the motor is changed. The auto-shift mechanism includes a worm gear that rotates with the motor, and a disc coupled to the worm gear that moves laterally as the worm gear rotates. Axial movement of the disc actuates a reversing lever of a ratchet mechanism by either pulling or pushing the reversing lever. A lost-motion mechanism can absorb an initial amount of torque so that the auto-shift mechanism can run its course prior to applying the torque to a fastener. | 04-17-2014 |
| 20140109730 | ADJUSTABLE RATCHETING SOCKET WRENCH - An adjustable socket that includes a housing, a rotatable member engageable with the housing such that the rotation of the rotatable member causes the housing to move upwardly or downwardly along the longitudinal axis, an adjusting collar engageable with the rotatable member and the housing, a plurality of jaws, a retainer, and a lock member. Each jaw is received in a corresponding one of apertures of the housing. The lock member is operatively connected with the rotatable member and is constructed and arranged to secure the adjusting collar to the housing and the plurality of jaws. The jaws are movable towards and away from the longitudinal axis of the housing through a range of positions upon the rotation of the rotatable member. | 04-24-2014 |
| 20140260820 | REVERSIBLE RATCHET WRENCH - A reversible ratchet wrench includes a wrench body, one end of which having a ratchet portion that has an activating opening and a circular hole, and an arc ratchet slot formed therebetween; a control unit having a circular plate portion, one end of which extending to form a handle unit, while the other end of which forming a block unit, and a U-shaped base formed at the top portion of the block unit and a spring is disposed at the U-shaped base; a ratchet unit, one end which having arc teeth, the other end of which having a protruding restricting portion, and a column protrudingly extending from one end of the restricting portion; and a rotating unit disposed at the activating opening of the wrench body, and a teeth ring formed at outer periphery of the rotating unit to engage with the arc teeth of the ratchet unit. | 09-18-2014 |
| 20140290442 | RATCHET HANDLE - A ratchet handle includes a detent. A front part of the detent has a first meshing portion and a second meshing portion to mesh with a ratchet gear. An accommodation recess is provided between the first meshing portion and the second meshing portion. An auxiliary member is provided in the accommodation recess. The auxiliary member has a curved surface corresponding to an outer contour of the ratchet gear. The ratchet handle further includes an operating device. The operating device is operated to turn the detent so as to control the first meshing portion or the second meshing portion to mesh with the ratchet gear. The detent of the present invention is turned with less noise and moved stably. | 10-02-2014 |
| 20140366690 | PAWL STRUCTURE FOR RATCHET WRENCHES AND THE WRENCHES USING THE SAME - A pawl structure of ratchet wrenches has multiple engaging teeth, a first recess and a second recess. The engaging teeth include first teeth at the mediate portion and second teeth are respectively located at two ends of the engaging teeth. The tips of the first teeth are located on a first curve which has a center and a central line extends through the center and intersects the first curve. The tips of the second teeth are located on a second curve which gradually leaves from the center of the first curve along with the second curve extending away from the central line. The first recess is located corresponding to the central line and the first teeth. The second recess is located corresponding to the second teeth. | 12-18-2014 |
| 20150135909 | REVERSIBLE RATCHET WRENCH - A novel reversible ratchet wrench may include a wrench body, a control member, a ratchet member and a rotating member, wherein the control member has a restricting slot and two stopper planes, and a deep hole for placing the spring. The control member is placed into the round hole of the wrench body by the half cylindrical body and connects with the ratchet member which is placed into the arc-shaped ratchet slot, thereby resulting in a secure relative positioning between the control member and the ratchet member. The novel reversible ratchet wrench allows convenient switch between directions of the rotational movement of the wrench body and the structural design effectively prevents the spring from ejecting from the deep hole of the control member or getting stuck by restricting the movement space of the spring. Furthermore, this structural design improves the smoothness of switching operation of the ratchet wrench. | 05-21-2015 |
| 20150143962 | RATCHET WRENCH - A ratchet wrench has a through cavity in which a reversing lever is disposed. The reversing lever has a pair of protruding lips formed thereon opposite from one another. A cooperating ledge is formed on the head in the cavity and on the pawl which is adjacent to the reversing lever. A spring-loaded pusher is disposed longitudinally in a blind bore in the reversing lever and the pusher engages a pocket in the pawl. A cover plate is disposed on a shelf recessed on the bottom of the wrench and spaced apart from the reversing lever. | 05-28-2015 |
| 20150352697 | RATCHET WRENCH - A ratchet wrench includes a body having a function head which has a first recess, a second recess and a third recess to respectively accommodate a ratchet wheel, a pawl and a switch unit. The ratchet wheel has a toothed portion and the pawl has a driving portion which is engaged with the toothed portion. The driving portion has multiple teeth and multiple curved teeth. The pawl has a curved recess, a protrusion and a contact face. The switch unit has a switch member, an end piece and a resilient member. The switch member controls the movement of the pawl to engage the curved teeth of the pawl with the teeth of the ratchet wheel to allow the ratchet wrench to optionally output torque in two directions. | 12-10-2015 |
| 20160008959 | REVERSIBLE RATCHET WRENCH | 01-14-2016 |
| 20160059390 | CONTROL DEVICE FOR RATCHET WRENCH - A ratchet wrench includes a handle having a hole in which a driving unit is located. A control member is partially engaged with the hole and connected to the top of the driving unit. The driving unit has a pawl engaged with the toothed face of the hole of the handle. A bead is movably received in the protrusion of the driving unit and cooperated with an operation rod. The operation rod is connected with a positioning unit located in the circular recess of the control member. The positioning member has a nut, a spring and a press disk. The nut is connected to the connection rod. A flange extends from the top of the nut. The spring is engaged between the flange and the press disk which is movable within the circular recess. A locking member extends through the press disk and is connected to the operation rod. | 03-03-2016 |
| 20160101510 | INTEGRATED WRENCH STRUCTURE FOR PREVENTING DEPARTED WORKPIECES - An integrated wrench structure for preventing departed workpieces comprises: a wrench head, which has a hollow operating accommodating space, a peripheral wall of the operating accommodating space has an operating surface, which has a combination of arc surface, curved surface or straight surface, a top end portion is above the wrench head, a top protruding portion of the top end portion circularly protrudes toward the center of the operating accommodating space, the top protruding portion forms an urging ring space that is internally protruded toward the center of the operating accommodating space and is above the operating accommodating space, the top protruding porting is a shielding limit of the operating accommodating space, the top protruding portion is the integrated portions of the wrench head. Therefore, by means of the simple wrench structure, the conveniences of manufacturing and assembling and the business benefits can be approached. | 04-14-2016 |
| 20160129563 | Rathchet Wrench with Dustproof Structure - A ratchet wrench includes a driving device having first and second sides spaced along a rotating axis. A compartment extends from the first side through the second side. A drive member is received in the compartment and includes an end for driving a tool. A ledge is formed on an inner periphery of an end of the compartment at the second side. A pressing rod extends into the drive member via the end of the compartment at the second side. The pressing rod is movable relative to the drive member along the rotating axis between a first position and a second position to control engagement with or detachment from the tool. A dustproof ring is mounted between the ledge and the pressing rod. The dustproof ring includes an outer side and an inner side. The outer side presses against an abutment portion of the ledge. The inner side presses against the pressing rod wherever the pressing rod is in the first position and the second position. | 05-12-2016 |
| 20160129564 | Reversible ratchet wrench - A reversible ratchet wrench includes a head including a through opening, a cavity on an inner surface of the through opening, and an open well on an inner surface of the cavity; a drive gear including external drive teeth and rotatably supported in the through opening; first and second reversing pawls each including pawl teeth and a detent notch wherein the detent notches communicates with each other, the pawl teeth of the second reversing pawl engage the drive teeth, and the first and second reversing pawls are in the cavity; a reversing lever including an exposed thumb tab, a recess on an inner surface, and a slit communicating with the recess; and a biasing member including first and second ends urging against the detent notches. The biasing member is anchored in the slit and urges against the well. | 05-12-2016 |
| 20160375561 | RATCHET WRENCH ABLE TO AUTOMATICALLY ADJUST ENGAGING TOOTH NUMBER ACCORDING TO EXTENT OF TORSION - A ratchet wrench able to automatically adjust engaging tooth number according to extent of torsion includes a ratchet block having two ends respectively extending to form an extension portion able to be optionally pushed and stuck between a ratchet ring and the resisting surface of a ratchet moving groove. The engaging surface of the ratchet block is a concave arcuate surface, and the ratio of the radius of the concave arcuate surface and the radius of the ratchet ring is between 1.017 and 1.033. Thus, when the ratchet block bears high torsion, the extension portion will be pushed toward the ratchet ring and the resisting surface of the ratchet moving groove to be pushed by the resisting surface to increase mutually engaging tooth number of the ratchet block and the ratchet ring, thus enabling the ratchet block to automatically adjust engaging tooth number according to extent of torsion. | 12-29-2016 |
