Pivoted Pawl Patents (Class 81/61)
  • Patent number: 11318592
    Abstract: A hydraulic torque wrench is disclosed and includes a nut engaging portion with ratchet teeth on an external surface thereof. There is also a support member which can rotate relative to whilst retaining the nut engaging portion. A ratchet mechanism cooperates with the ratchet teeth to apply a rotational force to the nut engaging portion as a result of the pushing force from a hydraulic ram. Side plate cover a junction between the nut engaging portion and the support member with the side plates having a noncircular aperture through which a nut and bolt can extend when the wrench is in use.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: May 3, 2022
    Assignee: SPX FLOW TECHNOLOGY ENGLAND LIMITED
    Inventor: Tony Dodds
  • Patent number: 11285585
    Abstract: A ratchet wrench comprising a housing, at least one gear supported within the housing, one of the at least one gear comprising a drive hole, a stationary handle extending from the housing, a dynamic handle hingedly extending from the housing such that, the dynamic handle is rotatable between at least one handle open position and a handle closed position, and at least one pawl, each of the at least one pawl adapted to slide between a pawl open position and a pawl closed position, one of the at least one pawl adapted to be in engagement with one of the at least one gear at a time. The dynamic handle disposed in operative communication with the at least one pawl such that, rotating the dynamic handle towards the handle closed position causes the at least one gear rotate in one direction and releasing the dynamic handle causes pawl to return to the pawl open position without causing the at least one gear to rotate in the opposite direction.
    Type: Grant
    Filed: February 17, 2019
    Date of Patent: March 29, 2022
    Inventor: Stanley D. Winnard
  • Patent number: 11040433
    Abstract: A dual ratcheting tool having multiple ratchet assemblies and handles for rotating adapters, sockets, and other tools is provided. The dual ratcheting tool includes an upper ratchet assembly independently rotationally and mechanically connected to a lower ratchet assembly; a drive member connected to the upper ratchet assembly and the lower ratchet assembly; an upper handle connected to the upper ratchet assembly, the upper handle having an upper directional switch to set a drive direction of the upper ratchet assembly; and a lower handle connected to the lower ratchet assembly, the lower handle having a lower directional switch to set a drive direction of the lower ratchet assembly. The upper and lower handles of the dual ratcheting tool can independently and in combination can drive a socket more quickly and efficiently than ratchets having a single ratchet assembly and handle.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: June 22, 2021
    Assignee: Split Ratchet, LLC
    Inventor: Dennis Blaine Terry, Jr.
  • Patent number: 10974373
    Abstract: A ratcheting wrench with ratchet heads coupled to a handle via a pin. The pin includes two ball detents that couple to the teeth of the spline in and an indent inside an opening of the ratchet head. The wrench can therefore be easily used in low profile applications and quickly adjusted due to the dual ball detent configuration of the pin.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: April 13, 2021
    Assignee: Snap-on Incorporated
    Inventor: Christopher D. Thompson
  • Patent number: 10682744
    Abstract: A ratchet wrench includes a first and a second drive members 21, 21? rotatably mounted in a first and a second heads 16, 16? extended from a first and a second ends of a handle 10. The first drive member 21 includes a square inner periphery 35 adapted to slidably retain a drive shaft 36 including a ½? drive fitting 45 and a ?? drive fitting 46, and the second drive member 21? includes a ¼? drive hexagonal bit holder 53 and ¼? drive fitting 54, for providing combined functions of ordinary ratchet wrenches for turning fasteners. A first and a second ratcheting mechanisms are mounted in the first and the second ends of the handle 10 for turning the first and the second drive members 21, 21?, by the handle 10.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: June 16, 2020
    Inventors: Ming Liang Zhang, Ming Zhu Zhang
  • Patent number: 10399214
    Abstract: A ratchet wrench comprising a housing, at least one gear supported within the housing, one of the at least one gear comprising a drive hole, a stationary handle extending from the housing, a dynamic handle hingedly extending from the housing such that, the dynamic handle is rotatable between at least one handle open position and a handle closed position, and at least one pawl, each of the at least one pawl adapted to slide between a pawl open position and a pawl closed position, one of the at least one pawl adapted to be in engagement with one of the at least one gear at a time. The dynamic handle disposed in operative communication with the at least one pawl such that, rotating the dynamic handle towards the handle closed position causes the at least one gear rotate in one direction and releasing the dynamic handle causes pawl to return to the pawl open position without causing the at least one gear to rotate in the opposite direction.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: September 3, 2019
    Inventor: Stanley D. Winnard
  • Patent number: 10207398
    Abstract: A tool assembly includes a first tool and a second tool. The first tool includes a first tool body, a ratchet mechanism defining a first hole, and a receiving space. The ratchet mechanism includes a ratchet having a plurality of teeth and a pair of pawls, and a first end of each of the pawls is received between two adjacent teeth. The second tool includes a first inner hexagonal wrench and a first outer hexagonal opener. The first outer hexagonal opener may be received in the first hole. When the first tool rotates relative to the ratchet mechanism along a first direction, the pawls rotates with the first tool and drives the ratchet together with the second tool rotates along the first direction; when the first tool rotates along a second direction opposite to the first direction, the ratchet together with the second tool is in a static state.
    Type: Grant
    Filed: January 7, 2017
    Date of Patent: February 19, 2019
    Inventor: Xingqing Ma
  • Patent number: 9956671
    Abstract: A selectively one-way wrench includes a lever, a toothed wheel inserted in the lever, two claws inserted in the lever, a switch operable to engage a selected one of the claws with the toothed wheel and disengage the other claw from the toothed wheel to cause the lever to rotate the toothed wheel via the selected claw only in a selected one of two directions. The selectively one-way wrench further includes a central spring and two lateral springs. The central spring includes two reduced sections each connected to a lateral face of a corresponding one of the claws and an enlarged section formed between the reduced sections. Each of the lateral springs includes a connecting section connected to a rear face of a corresponding one of the claws and an end for abutment against a portion of the lever to push the corresponding claw to engagement with the toothed wheel.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: May 1, 2018
    Inventor: Yi-Min Li
  • Patent number: 9788869
    Abstract: A spinal fixation element rotation instrument with two lever arms is provided. The lever arms are connected to each other at distal ends thereof. The second lever arm rotates relative to the first lever arm. The distal ends of the first and second lever arms are adapted to couple to a spinal fixation element. The distal ends of the lever arms may have a dual ratchet feature that prevents rotation in a set direction. When one arm rotates back and forth, the other arm is held stationary. As a result, the spinal fixation element rotates in a predetermined direction and is prevented from rotating back toward its initial position. The direction of the rotation of the spinal fixation element may be set using knobs or switches provided at a proximal end of one or both of the lever arms.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 17, 2017
    Assignee: DEPUY SYNTHES PRODUCTS, INC.
    Inventors: Shawn D. Stad, Christopher L. Ramsay, Thomas Gamache, Raymond F. Murphy
  • Patent number: 9032845
    Abstract: A ratchet wretch includes a first recess, a second recess and a third recess. A ratchet wheel is rotatably located in the first recess and a pawl is located in the second recess. The pawl has a curved recess defined in the rear side thereof and a protrusion extending therefrom. A first face is defined between the protrusion and the curved recess. A second face is defined in the pawl and located away from the third recess. The rotatable unit comprises a rotatable member, a first hat and a resilient member. The rotatable unit has a circular rod pivotably connected to the third recess. The circular rod has a restriction slot and three top surfaces. One of the top surfaces contacts the second face to restrict the rotatable member from disengaging from the third recess. The first hat and the resilient member are located in the restriction slot.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: May 19, 2015
    Inventor: Li-Ching Lin
  • Publication number: 20150075333
    Abstract: A wrench tool for screwdriver bits contains a body, a biasing member, and an elastic element. The body includes a tool seat received in an end portion thereof, the tool seat includes a fitting groove defined on a first end thereof and fitting with screwdriver bits, the fitting groove has a locking structure for retaining the screwdriver bits, and the tool seat further includes a second end communicating with the fitting groove. The biasing member is secured on the second end of the tool seat, the biasing member has a pushing portion fixed on a first end thereof and extending out of the fitting groove and has a pressing portion disposed on a second end thereof and pressed to push the screwdriver bits. The elastic element is mounted on the second end of the tool seat and used to push the biasing member to move back to an original position.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Inventor: Wei-Lin Chen
  • Publication number: 20140366689
    Abstract: A link attachment 100 for use with a device 300 for effecting an intermittent turning force 360 which oscillates in a forward and a backward direction 361 and 371 for tightening or loosening a fastener including: —a link housing 115; a link drive input 131 operatively connectable with device 300; a link drive lever 102 operatively connected with link drive input 131; a link drive plate 101 operatively connected to link drive lever 102 at a pivot point 125 by a link drive pin 105; a link ratcheting mechanism 103 operatively connected to link drive lever 102 by a drive pawl 104; a link attachment drive output 130 operatively connected with link ratcheting mechanism 103 and operatively connectable with the fastener; and link attachment 100 being operatively connectable to device 300 to provide intermittent turning force 360 to turn the fastener.
    Type: Application
    Filed: August 26, 2012
    Publication date: December 18, 2014
    Inventors: Calvin A Bonas, Peter Koppenhoefer
  • Patent number: 8893588
    Abstract: A ratchet wrench includes a driving head, two retaining rings engaged in the driving head, a driving member rotatably engaged in the driving head and having a gear, and a pawl engaged in the driving head and having a lever arm extended from a shaft, and one or more teeth formed on the lever arm for engaging with the gear and for determining the driving direction of the driving member by the driving head and the handle, the shaft includes two end segments extended beyond the lever arm for forming two engaging surfaces and for engaging with the retaining rings and for allowing the retaining rings to apply a spring biasing force onto the end segments of the shaft and to force the teeth of the lever arm to engage with the gear.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: November 25, 2014
    Inventor: Yu Yen Chien
  • Patent number: 8893590
    Abstract: A ratchet wrench adjustable in clamping size is provided with a body, a ratchet wheel, an adjustment member, two engaging members and a spring. The body includes a head portion, a handle and a switch member. The two engaging members are oppositely located on the ratchet wheel and the adjustment member and each include an engaging portion, a neck portion connected to the engaging portion and located in the ratchet wheel, and an upper portion connected to the neck portion and located in the adjustment cavity of the adjustment member. By such arrangements, rotating the rotating portion of the adjustment member adjusts relative positions of the upper portions of the two engaging members in the adjustment cavity of the adjustment member, and makes the neck portions of the engaging members to move along the guide slot so as to change a distance between the two engaging portions.
    Type: Grant
    Filed: March 9, 2013
    Date of Patent: November 25, 2014
    Assignee: Infar Industrial Co., Ltd.
    Inventor: Ander Chen
  • Patent number: 8857296
    Abstract: In a ratchet wrench body and its manufacturing method, the body comprises a handle and a head, and the head has a through hole, a control compartment, and a slot chamber. The head has a first surface and a second surface, and at least one embedded hole formed between the slot chamber and the first and second surfaces, and each embedded hole is penetrated through one side but not penetrated through the other side, and each embedded hole is smaller than an elastic element and a propping element contained in the slot chamber, and the slot chamber is extended from each embedded hole inwardly towards the slot chamber and formed by the total volume occupied by adjacent intersected surfaces.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 14, 2014
    Inventor: Ping-Chung Huang
  • Publication number: 20140196576
    Abstract: A controlling structure for a unidirectional ratchet wrench contains a driving head of a unidirectional ratchet wrench, and driving head having a receiving cavity and a groove communicating with the receiving cavity. The receiving cavity has a driving member, and the driving member has a toothed portion. The groove has a retaining block received therein, and the retaining block has a plurality of locking teeth so as to engage with the toothed portion. The retaining block has a slot or a tab so as to retain with the elastic member. The elastic member has a fitting segment, a curved section, and an abutting segment, the fitting segment is fitted into the slot or is retained with the tab, the curved section extends outwardly from the fitting segment and becomes curved, and the abutting segment connects with the curved section and abuts against the groove.
    Type: Application
    Filed: January 14, 2013
    Publication date: July 17, 2014
    Inventors: YU WEN CHEN, Tien Sung Chen
  • Patent number: 8776640
    Abstract: A ratchet wrench includes a head having a first compartment rotatably receiving a drive member. A second compartment is defined in an inner periphery of the first compartment and receives first and second pawls. A switch is pivotably mounted in a control groove of the head and controls engagement relations between the first and second pawls and the drive member. A limiting member is connected between the first and second pawls and maintains two closest teeth respectively of first and second toothed sections of the first and second pawls to be in a restraining spacing that is smaller than a jam spacing, preventing the first and second pawls from jamming between the drive member and a wall of the second compartment.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: July 15, 2014
    Inventor: Bobby Hu
  • Publication number: 20140150611
    Abstract: A one-way torque tool includes a head, a rotor placed in the head, a number of ratchets formed on the head, two pawls pivotally connected to the rotor and detachably engaged with the ratchets. The ratchets are separated from one another by a first angle ? identical to 360 degrees divided by the number of the ratchets. The pawls are separated from each other by a second angle ? identical to a multiple of the first angle ? plus a third angle ? that is smaller than the first angle ?.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Inventor: Yi Min WU
  • Patent number: 8661945
    Abstract: A clamping ratcheting wrench is disclosed that is capable of being opened and closed without slipping the wrench over the end of a nut to be tightened or loosened. This wrench overcomes many problems because it may be used on a nut that is in a very tight position where a traditional wrench would not fit, nor would a conventional wrench be capable of ratcheting. The ratchet is effected by individual ratchet segments that are held in place when the wrench is opened. One of the true advantages of the various aspects is that the ratchet can be opened and closed once the ratchet segments are aligned, such that the segments are secured in place to allow the wrench to be opened up without having all the segments fall out of the wrench. A first aspect of the invention discloses an interlocking ratchet piece design, while a second aspect of the invention discloses another ratchet piece design with structural channeling to secure the ratchet segments in alignment so that the segments do not come out of the wrench.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: March 4, 2014
    Inventor: Ali W ElDessouky
  • Patent number: 8650991
    Abstract: A ratchet wrench includes a handle; a wrench head comprising a first cavity and a second cavity communicating therewith; a drive gear and socket combination rotatably disposed in the first cavity and comprising surface teeth; a reversing pawl comprising pawl teeth on one surface, the pawl teeth meshed with the teeth of the drive gear and socket; a pivotal unit pivotably disposed in the second cavity, the pivotal unit urging against the other surface of the reversing pawl and being adapted to reciprocally pivot about the reversing pawl; and a reversing button assembly moveably disposed on the wrench hand and aligned with an axial direction of the handle. The reversing button assembly is adapted to manually move along a straight line to activate the pivotal unit which pivots the reversing pawl so as to permit the drive gear and socket combination to rotate clockwise or counterclockwise.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: February 18, 2014
    Inventor: Yi-Hung Lin
  • Patent number: 8640573
    Abstract: A ratchet wrench for use in connection with medical instruments comprises a handle and a drive element which is rotatable around an axis (M) with respect to the handle. The wrench is adapted to tighten or loosen a respective element and a ratchet mechanism which is in connection with the drive element and which permits movement with respect to the handle in a first direction of rotation (R1) and blocks movement in the other direction of rotation (R2). The handle comprises a flat arm, wherein the ratchet mechanism is arranged on a bearing surface of the flat arm, and wherein the drive element extends through an opening in the flat arm in which opening the drive element is rotatably arranged.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: February 4, 2014
    Assignee: Stryker Trauma SA
    Inventor: Joël Bouquet
  • Patent number: 8616095
    Abstract: A hand tool includes a head in which a driving member is received and a pawl is engaged with the driving member. A handle has a substantially round driving end which is rotatably received in a pivoting recess in the head and a pushing member protrudes from the driving end and is engaged with the pawl. The handle includes two contact sides which alternatively contact two outward tapered sidewalls of a driving recess in the driving end when operating the handle. The pawl is shifted to contact the driving member by the teeth at different positions of the pawl when operating the handle to change the driving direction of the driving member. No switching member is connected to the pawl and protrudes from the top surface of the head of the hand tool.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: December 31, 2013
    Inventor: Yuan-Chin Chi
  • Publication number: 20130333525
    Abstract: A ratchet wretch includes a first recess, a second recess and a third recess. A ratchet wheel is rotatably located in the first recess and a pawl is located in the second recess. The pawl has a curved recess defined in the rear side thereof and a protrusion extending therefrom. A first face is defined between the protrusion and the curved recess. A second face is defined in the pawl and located away from the third recess. The rotatable unit comprises a rotatable member, a first hat and a resilient member. The rotatable unit has a circular rod pivotably connected to the third recess. The circular rod has a restriction slot and three top surfaces. One of the top surfaces contacts the second face to restrict the rotatable member from disengaging from the third recess. The first hat and the resilient member are located in the restriction slot.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Inventor: Li-Ching Lin
  • Patent number: 8596170
    Abstract: The present invention discloses a single direction ratchet wrench which comprises a main body, a ratchet wheel, a pawl, an elastic element and a clip. The ratchet wheel and the pawl are lodged within the main body. The pawl has retaining cogs, concave surfaces and recess. One end of the elastic element is lodged within the second housing and the other end within the recess. The elastic element pushes the pawl with a particular angle so that the retaining cogs of the pawl are engaged with the ratchet teeth.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: December 3, 2013
    Inventor: Cheng-Pu Yang
  • Patent number: 8567287
    Abstract: The present invention relates to the field of open-ended wrenches, and more specifically to a dual pawl assembly which can be used within an open-ended ratchet wrench to facilitate a bi-directional ratcheting motion.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: October 29, 2013
    Inventors: Steve Gapp, Clint Johnson, Reed Felton
  • Patent number: 8555751
    Abstract: A ratchet wrench includes a handle and a pawl is pivotably connected to the handle. The pawl is selectively engaged with a positioning unit in the handle. A ratchet wheel has a through hole defined through the center portion thereof and the ratchet teeth of the ratchet wheel are engaged with the engaging teeth of the pawl. Two clamp members are inserted in the through hole of the ratchet wheel and each have an extension. Each extension has a slot defined in top and bottom thereof. The two extensions extend toward opposite directions. Two ring-shaped covers are respectively connected to the top and the bottom of the ratchet wheel and each cover has two openings defined in the underside thereof. The extensions extend through the openings. Pins extend through the covers and are engaged with the slots. The clamp members are movable to clamp objects of different sizes.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: October 15, 2013
    Inventor: Shwu-Ruu Chern
  • Patent number: 8555752
    Abstract: A ratchet wrench includes a driving head, a retaining ring engaged in the driving head, a driving member rotatably engaged in the driving head and having a gear, and a pawl engaged in the driving head and having a lever arm extended from a shaft, and one or more teeth formed on the lever arm for engaging with the gear and for determining the driving direction of the driving member by the driving head and the handle, the shaft includes a slot for engaging with the retaining ring and for allowing the retaining ring to apply a spring biasing force onto the shaft and to force the teeth of the lever arm to engage with the gear.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 15, 2013
    Inventor: Yu Yen Chien
  • Patent number: 8516928
    Abstract: A ratchet wrench includes a head having a first compartment rotatably receiving a drive member. A second compartment is defined in an inner periphery of the first compartment and receives first and second pawls. A switch is pivotably mounted in a control groove of the head and controls engagement relations between the first and second pawls and the drive member. A limiting member is connected between the first and second pawls and maintains two closest teeth respectively of first and second toothed sections of the first and second pawls to be in a restraining spacing that is smaller than a jam spacing, preventing the first and second pawls from jamming between the drive member and a wall of the second compartment.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: August 27, 2013
    Inventor: Bobby Hu
  • Patent number: 8511206
    Abstract: A ratchet wrench includes a body, a driving head, a control member and a resilient member. The body includes a handle and a Y-shaped extension. The driving head is pivotably connected to the Y-shaped extension by two pivots and an inner groove and a recess are respectively defined in the inside of the Y-shaped extension. The inner groove accommodates the C-shaped plate of the control member and the resilient member is received in the recess. The C-shaped plate has engaging teeth defined in distal ends thereof and the pivots each have ratchet teeth which are engaged with the engaging teeth by moving the control member so as to control the rotation of the driving head relative to the body.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 20, 2013
    Inventor: Ming-Nan Hong
  • Patent number: 8485069
    Abstract: A wrench with a ratchet device includes a wrench body, a driving set, a cover member and a controlling member. A hole is opened on the wrench body. A receiving space is defined near the hole. An assembling groove is defined near the receiving space. The controlling member is assembled into the receiving space. The driving set has a ratchet and a driving block. The ratchet is assembled into the hole and the driving block is assembled into the receiving space. The driving block abuts against a bottom of the receiving space. The ratchet is engaged with the driving block. The controlling member has a switching member inserted into the assembling groove to move the driving block. Under this arrangement, when the ratchet engages with the driving block, the driving block is stable because the bottom of the receiving space abuts against the driving block.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: July 16, 2013
    Inventor: Yi-Fu Chen
  • Patent number: 8474351
    Abstract: 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.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: July 2, 2013
    Assignee: Easco Hand Tools, Inc.
    Inventors: Robert L. Arnold, Richard P. Folkenroth
  • Patent number: 8464616
    Abstract: A tool includes first, second and third rods which are pivotably and pivotably connected to each other. The first rod is pivotably connected between the second and third rods. Control members, resilient members and contacting members are located at the pivotal portions so as to control the first rod to be pivotable or positioned relative to the second and third rods.
    Type: Grant
    Filed: September 25, 2011
    Date of Patent: June 18, 2013
    Inventor: Man-Chi Chang
  • Patent number: 8413550
    Abstract: A ratchet wrench (10) includes a head (12) having a compartment (121) rotatably receiving a drive member (12). An annular groove (126) is formed in an inner periphery of the compartment (121) and in communication with a recess (13) formed in a side (F2) of the head (12). A flange (2121) is formed on an outer periphery of the drive member (21) and intermediate a toothed portion (213) of the drive member (21) and an annular groove (214) formed in the outer periphery of the drive member (21). A flange (2121) is formed on the outer periphery of the drive member (21) and includes an inner end face (2122) facing a bottom face (133) of the recess (13). A C-clip (24) is received in the annular grooves (126, 214) and has two clamping portions (241) received in the recess (13). A dustproof cap (30) engaged in the recess (13) and located intermediate a bottom face (133) and the recess (13) and the inner end face (2122) of the flange (2121).
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 9, 2013
    Inventor: Bobby Hu
  • Patent number: 8413549
    Abstract: A revolving screwdriver with ratchet structure includes a handle, a pushing rod, and a sliding member. The sliding member has a receiving space and a holding chamber defined therein. A revolving cylinder is received in the holding chamber. The receiving space receives at least one ratchet wheel, two rotators, a limiting member, a base, and an adjuster. The at least one ratchet wheel engages with a driving shaft. The rotators selectively engage with the at least one ratchet wheel. The limiting member locates between the rotators and has a protrusion formed thereon. A base has a first guiding slot defined therein. The adjuster has a driving hole defined therein. The protrusion passes through the first guiding slot and the driving hole for being driven by the adjuster and moving along the first guiding slot.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: April 9, 2013
    Inventor: Yi Jhen Chen
  • Patent number: 8261637
    Abstract: 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.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: September 11, 2012
    Assignee: New Way Tools Co., Ltd.
    Inventor: Ping-Wen Huang
  • Patent number: 8245602
    Abstract: A ratchet wrench includes a wrench head having a pawl compartment formed between a notch and a chamber of the wrench head, a drive member mounted in the chamber of the wrench head and having a ratchet gear, a pawl slidably received in the pawl compartment of the wrench head for engaging with the ratchet gear and for controlling the driving direction of the drive member by the wrench head, a handle having a pivotal coupling member mounted in the notch of the wrench head, and an actuating member attached to the pivotal coupling member and engaged with the pawl for moving the pawl to either side of the pawl compartment of the wrench head in order to determine the driving direction of the drive member by the wrench head.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: August 21, 2012
    Inventor: Meng Tsung Chan
  • Publication number: 20120167723
    Abstract: A reduced arc box end ratchet wrench or ratchet drive wrench utilizes a multiple pawl ratchet assembly comprised of a body having an insert cavity to enclose critical components of an insert that is secured within the ratchet assembly. The insert is set into the wrench body and includes a plurality of pivoting pawls. Each pawl comprises a lever arm with ratchet engaging teeth. The pawl arms are positioned relative to the ratchet wheel to create “pawl swing arcs” and “reduced ratcheting arcs” to alternately or successively engage a portion of the teeth of a ratchet wheel at all times. This configuration allows smaller degrees between ratchet teeth and a smaller wrench rotation that is otherwise required to apply torque.
    Type: Application
    Filed: March 9, 2012
    Publication date: July 5, 2012
    Inventors: Steven James Gapp, Clinton M. Johnson, J. Reed Felton
  • Publication number: 20120055289
    Abstract: A ratchet wrench for use in connection with medical instruments comprises a handle and a drive element which is rotatable around an axis (M) with respect to the handle. The wrench is adapted to tighten or loosen a respective element and a ratchet mechanism which is in connection with the drive element and which permits movement with respect to the handle in a first direction of rotation (R1) and blocks movement in the other direction of rotation (R2). The handle comprises a flat arm, wherein the ratchet mechanism is arranged on a bearing surface of the flat arm, and wherein the drive element extends through an opening in the flat arm in which opening the drive element is rotatably arranged.
    Type: Application
    Filed: August 23, 2011
    Publication date: March 8, 2012
    Applicant: STRYKER TRAUMA SA
    Inventor: Joël Bouquet
  • Publication number: 20120000323
    Abstract: The present invention discloses a single direction ratchet wrench which comprises a main body, a ratchet wheel, a pawl, an elastic element and a clip. The ratchet wheel and the pawl are lodged within the main body. The pawl has retaining cogs, concave surfaces and recess. One end of the elastic element is lodged within the second housing and the other end within the recess. The elastic element pushes the pawl with a particular angle so that the retaining cogs of the pawl are engaged with the ratchet teeth.
    Type: Application
    Filed: June 20, 2011
    Publication date: January 5, 2012
    Inventor: Cheng-Pu Yang
  • Publication number: 20110209585
    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.
    Type: Application
    Filed: June 4, 2010
    Publication date: September 1, 2011
    Inventor: Chih-Ching HSIEH
  • Patent number: 7895920
    Abstract: A ratchet wrench devised for torquing axially placed hexagonal nut fasteners on hydraulic or similar lines. The wrench is formed of two main components: The first component consists mainly of a straight elongated handle with a semi-circular collar head attached thereto opening to one side. The collar houses three identical metal inserts which when assembled therein form half a peripherally ratcheting wheel with half an axial inner hexagonally shaped socket of predetermined dimensions. The second main component comprises a second mirror-image semi-circular collar housing identical metal inserts, with a tangentially protruding pin member which slides into a slot disposed in the first component. The two components assembled together form a ratcheting wrench with a wheel having an axial hexagonal slot which circumscribes the fastener to be torqued. A spring-biased pawl disposed in the main component engages the ratchet wheel.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: March 1, 2011
    Inventor: Hani A. Abunameh
  • Publication number: 20100257979
    Abstract: An open end ratchet wrench is defined with a gap which allows the ratchet wrench to pass through a pipe or obstacle to carry out rotation, thus improving the operability and convenience of the wrench. Both ends of the open end ratchet wrench extend outward to form a stopping piece, respectively. The stopping pieces allow the toothed pawl to be well positioned and prevent it from disengaging, thus maintaining a stable torque and making the ratchet wrench easy to use.
    Type: Application
    Filed: April 11, 2009
    Publication date: October 14, 2010
    Inventor: Shu-Su ZHAN
  • Publication number: 20100251859
    Abstract: The present invention relates to the field of open-ended wrenches, and more specifically to a pawl component which can be used within ratchet wrench housings having conventional dimensions to create an inexpensive open-ended ratchet wrench which can be easily mass-produced.
    Type: Application
    Filed: April 7, 2009
    Publication date: October 7, 2010
    Inventors: Steven Gapp, Clint Johnson
  • Publication number: 20100186554
    Abstract: A wheel wrench includes a body, a head, a fitting, and a ratcheting mechanism. The head is connected to one end of the body, wherein the length direction of the head and the length direction of the body are neither orthogonal nor parallel. The fitting is for a socket. The ratcheting mechanism couples the fitting to the head, wherein the length of the ratcheting mechanism is greater than the width of the fitting.
    Type: Application
    Filed: March 22, 2010
    Publication date: July 29, 2010
    Inventor: Chih-Ching HSIEH
  • Publication number: 20090249923
    Abstract: A fastening device for the attachment of a structural member to a support member comprising a lower portion having a shank portion of for example annular circumference and being provided with means for the attachment to the support member, and further comprising an upper portion having a radial flange at the outer side and an axial passage, the shank portion being insertable into the axial passage from one end thereof, at least one outer side of the shank portion having an axially parallel extending row of saw-tooth-shaped teeth, a resilient pawl being formed at passage such that the pawl and the row of teeth cooperate ratchet-like when the upper portion is pushed onto the shank portion and blocks a displacement in the opposite direction.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 8, 2009
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventor: Stefan SEIDEL
  • Publication number: 20090151518
    Abstract: A ratchet wrench devised for torquing axially placed hexagonal nut fasteners on hydraulic or similar lines. The wrench is formed of two main components: The first component consists mainly of a straight elongated handle with a semi-circular collar head attached thereto opening to one side. The collar houses three identical metal inserts which when assembled therein form half a peripherally ratcheting wheel with half an axial inner hexagonally shaped socket of predetermined dimensions. The second main component comprises a second mirror-image semi-circular collar housing identical metal inserts, with a tangentially protruding pin member which slides into a slot disposed in the first component. The two components assembled together form a ratcheting wrench with a wheel having an axial hexagonal slot which circumscribes the fastener to be torqued. A spring-biased pawl disposed in the main component engages the ratchet wheel.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 18, 2009
    Inventor: Hani A. Abunameh
  • Patent number: 7430945
    Abstract: A tool is provided for driving fasteners that includes a torque limiting mechanism therein. The torque limiting mechanism includes a first frictional engagement member disposed on the drive shaft for the tool that is engaged by one or more second frictional engagement members disposed on one or more sides of the first frictional member. The second frictional engagement members are biased into engagement with the first member by biasing members disposed within the handle that can be adjusted in order to provide more or less of a biasing force to control the frictional engagement of the second member with the first member and thereby control the torque limiting function of the torque limiting mechanism. In addition, a drive shaft is also engaged with a ratcheting mechanism that enables the tool to drive a fastener into a suitable substrate in only a single direction.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: October 7, 2008
    Assignee: Gauthier Biomedical Inc.
    Inventors: Michael T. Gauthier, Steven S. Landowski
  • Publication number: 20080223179
    Abstract: A wrench comprises a handle connected to a housing. A socket is rotatably supported in the housing for ratcheting movement relative to the housing. A retaining member releasably secures a device in the socket. A retainer is supported on the housing and is movable between a first position and a second position. The retainer, when in the first position, at least partially overlays the socket. A plurality of guides orient a member relative to the socket. The guides are mounted in a rotatable body. A first handle is permanently connected to the housing and a second handle is removably connected to the housing.
    Type: Application
    Filed: May 1, 2007
    Publication date: September 18, 2008
    Inventors: Derek J. Nash, Brandon S. Cross
  • Patent number: 7421772
    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.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: September 9, 2008
    Assignee: Teleflex Medical Incorporated
    Inventors: Hua Gao, James A. Rinner
  • Publication number: 20080141833
    Abstract: A ratchet wrench includes a wrench head, a handle pivotally connected to the wrench head, a retaining member having retaining and actuating ends and movable longitudinally relative to the handle to engaging and disengaging positions so as to engage and disengage the wrench head, an actuating member movable transversely relative to the handle to first and second positions so as to move the retaining member to the engaging and disengaging positions, and a biasing unit disposed to bias the actuating member toward the retaining member longitudinally so as to ensure immobility of the actuating member in the first position.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventor: Jui-Chi SHEN