Single Patents (Class 81/63)
  • Patent number: 6935213
    Abstract: A mechanism for changing direction of exerted force of wrench having a ratchet wheel is disclosed. In an enclosed box portion of the wrench there are provided an opening, a C-shaped seat on a bottom of the opening, the C-shaped seat having a C-shaped groove, a ratchet wheel disposed in the opening, a pawl in a first cavity, an upright swing assembly in a second cavity, and a ring for retaining the ratchet wheel in place. Counterclockwise turning the swing assembly will bias one steel ball against the pawl for engaging the pawl with the ratchet wheel, thereby causing the wrench to exert force toward a direction. Alternatively, a clockwise turning of the swing assembly will cause the wrench to exert force toward a reverse direction. Further, clockwise turning the wrench will cause the ratchet wheel to be inoperative, thereby adjusting an angle of the exerted force.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: August 30, 2005
    Assignees: A.A.G. Industrial Co., Ltd
    Inventors: Lin Shu-Sui, Li Wan-Chuan
  • Patent number: 6918323
    Abstract: A ratcheting tool includes a body and a gear disposed in the body. The gear defines a plurality of teeth on a circumference of the gear so that the gear teeth define a first arc having a first radius. A pawl is disposed in the body so that the pawl is movable laterally with respect to the gear between a first position, in which the pawl is disposed between the body and the gear so that the body transmits torque through the pawl in a first rotational direction, and a second position, in which the pawl is disposed between the body and the gear so that the body transmits torque through the pawl in an opposite rotational direction. The pawl defines a plurality of teeth facing the gear, and the pawl teeth define a second arc having a second radius larger than the first radius.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: July 19, 2005
    Assignee: Easco Hand Tools Inc.
    Inventors: Robert L. Arnold, Richard P. Folkenroth
  • Patent number: 6904832
    Abstract: A ratchet wrench includes a wrench body, a ratchet wheel, a pawl member, a control member, a direction control member, and a locking plate. Thus, the pawl member engages the ratchet wheel rigidly and closely, so that the pawl member and the ratchet wheel have the optimum locking state.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: June 14, 2005
    Inventor: Yu Tang Chen
  • Patent number: 6886428
    Abstract: A control mechanism for a ratchet tool includes a switch pivotably received in a chamber in the head of the tool and a pawl is received in a recess so as to be matched with a gear wheel in the head. The pawl is located at located at a mediate portion of a depth of the chamber in the head. The switch has two holes in each of which a pushing member a spring are received. The pushing member is received in the hole and covered by an inside of the chamber when the switch is not pivoted. The user may push either one of two ends of the pawl toward the chamber to shift one of the pushing members to be in alignment with one of the convex portions. The pushing member that is shifted pushes the convex portion and pivots the pawl to be matched with the gear wheel.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: May 3, 2005
    Inventor: Chih-Ching Hsien
  • Patent number: 6868758
    Abstract: A joint apparatus is provided for firmly connecting a head of a wrench with a socket. The joint apparatus includes a joint and a retainer. The joint includes a first portion for releasable engagement with the head of the wrench and a second portion for releasable engagement with a socket. The retainer is attached to the first portion of the joint for abutting the head of the wrench, thus avoiding the joint escaping the head of the wrench.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: March 22, 2005
    Inventor: Terence Chen
  • Patent number: 6868759
    Abstract: A ratcheting tool has a head and a handle attached to the head. The head rotatably receives a gear ring and receives a pawl that is in operative engagement with the gear ring. A housing disposed in the head receives a spring that is in operative engagement with the pawl so that rotation of a lever causes the pawl to move between a first position and a second position.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: March 22, 2005
    Assignee: Easco Hand Tools Inc.
    Inventor: Hsien-Chung Tuan-Mu
  • Patent number: 6805028
    Abstract: A reversible ratchet wrench includes a wrench body having a head portion that has a hole and a chamber communicated with the hole. A ratchet wheel is rotatably mounted in the hole of the wrench body. A pawl is moveably received in the chamber of the wrench body and meshed with the ratchet wheel. An annular cover is rotatably mounted on the head portion of the wrench body for preventing the ratchet wheel from escaping out of the hole of the wrench body. The annular cover has a driving member contactable to the pawl for driving the pawl to move to a position where the ratchet wheel can be forced to turn clockwise or counterclockwise.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: October 19, 2004
    Inventor: Jong-Shing Chang
  • Patent number: 6789447
    Abstract: A reversible ratchet head assembly includes a reversal actualor (34) which is received in an opening in an output shaft assembly (48) of a tool. The output shaft assembly carries a pawl (60) which pivots on the output shaft assembly between two positions, one permitting driven rotation of an output shaft of the output assembly in a clockwise direction, and the other permitting driven rotation in a counterclockwise direction. In each position, the pawl permits the tool to be turned in the direction opposite the driven direction for ratcheting operation of the tool. When the direction of rotation is reversed in a powered tool, the reversal actuator moves relative to the output shaft assembly and engages the pawl to automatically switch the pawl from one position to the other. The reversal actuator has two spring-biased fingers (50a. 50b) which alternatively engage the pawl to move it into one position or the other.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: September 14, 2004
    Inventor: Frederick L. Zinck
  • Patent number: 6779422
    Abstract: A ratchet wrench includes a wrench body, a ratchet wheel, a pawl member, and an elastic member. Thus, when the ratchet wrench jams during operation, the jamming prevention portion may force the pawl member to detach from the ratchet wheel, thereby preventing the ratchet wrench from jamming during operation. In addition, when the pawl member compresses the elastic member to a determined extent, the jamming prevention portion applies a reaction on the wall of the locking recess of the wrench body, so that the pawl member will not compress the elastic member to an excessive extent, thereby preventing from wearing the elastic member.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: August 24, 2004
    Inventor: Terence Chen
  • Publication number: 20040129114
    Abstract: A wrench includes a head, a handle, a socket, a pawl and a switch. The head defines a horizontal tunnel. The handle extends movably through the horizontal tunnel and includes two stops attached thereto for retaining the handle on the head. The socket is rotationally connected with the head. The socket includes an internal face including a toothed portion and a non-circular portion. The pawl is put between the head and the socket. The pawl includes a first member with a toothed side and a second member with a toothed front side. The toothed side of selective one of the members of the pawl engages with the toothed portion of the internal face of the socket so that the head can drive the socket through the pawl in selective one of two directions. The switch is connected with the pawl so that the switch can be switched so as to engage the toothed side of selective one of the members of the pawl with the toothed portion of the internal face of the socket.
    Type: Application
    Filed: October 20, 2003
    Publication date: July 8, 2004
    Inventor: Terence Chen
  • Patent number: 6752045
    Abstract: A squeeze type, rotating wrench has a toothed drive gear for receiving selected tool elements. The drive gear is driven in a selected direction by a push arm and reversible pawl upon squeezing of a pair of handles relative to each other. Reversing the direction of rotation is accomplished by pivoting the pawl from one position to another relative to the push arm.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: June 22, 2004
    Assignee: Custom Spec Engineering, Inc.
    Inventor: John A. Badiali
  • Publication number: 20040083858
    Abstract: The ratchet wrench includes a ¼ inch and a ⅜ inch driver combination on opposite sides of the ratchet embodiment and a handle that extends to a plurality of lengths for various torque requirements. Each adjusted length is secured by a spring induced detent ball housed within a vertical hole on the ratchet's solid arm, the detent ball seats into a plurality of holes on the extendable handle. The smaller ¼ inch driver side is housed within the ratchet head and into a hollow ¼ inch square configured slot provided at the central axis of the ratcheting gear and fixed ⅜ inch driver unit. A manually slideable gate expels and retracts the spring induced ¼ inch driver outward to an adequate working length and is manually retracted and retained by the slideable gate. The ratchet has an ultra thin profile for use in limited working spaces and convenient storage.
    Type: Application
    Filed: February 24, 2003
    Publication date: May 6, 2004
    Inventor: Thomas Carnesi
  • Patent number: 6729209
    Abstract: A tool includes a driving head rotatably secured to a handle, an actuator member rotatably received in the driving head and having a depression and one or more recesses of different depths. Two detent members are biased to engage with the depression and the recess of the actuator member and to engage with the handle respectively. A rod is extended from one of the detent members and spaced away from the other detent member for different distances when the detent member is engaged with the depression and the recess of the actuator member.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: May 4, 2004
    Inventor: Chia Yu Chen
  • Publication number: 20040065175
    Abstract: A ratcheting wrench includes a handle, a head extending from an end of the handle and having a hole communicated with a compartment in the end of the handle, a drive member rotatably mounted in the hole of the head, and a ratcheting mechanism. The drive member includes an inner periphery for securely holding a fastener-driving member, allowing joint rotation when the drive member is turned. A retainer is mounted around the end of the drive member and has two resilient portions extending into the hole of the drive member via the slots for rotatably holding the drive member in the hole of the head and for securely, releasably holding the fastener-driving member in the hole of the drive member.
    Type: Application
    Filed: August 25, 2003
    Publication date: April 8, 2004
    Inventor: Bobby Hu
  • Patent number: 6715382
    Abstract: A ratchet tool includes a head having a hole for receiving an engaging member therein and a recess is defined in an inner periphery of the hole so as to receive a pawl which is engaged with the engaging member. A passage is defined through the head and communicates with the recess. Two notches are defined in an inner periphery of the passage. A shifter member is rotatably received in the passage and has a lever is located on an outside of the head. A bead and a spring are received in a hole of the shifter member and the bead is engaged with one of the two notches. The spring is engaged with a second side of the pawl.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: April 6, 2004
    Inventor: Chih-Ching Hsien
  • Patent number: 6711973
    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: March 19, 2002
    Date of Patent: March 30, 2004
    Assignee: Hand Tool Design Corporation
    Inventors: Robert L. Arnold, Richard P. Folkenroth
  • Patent number: 6708586
    Abstract: A ratchet wrench includes a drive head, a ratchet wheel, a direction controller, and a pawl member. The direction controller is formed with a slit facing the expansion slot of the drive head. An insertion plate is mounted in the expansion slot of the drive head, and has a first side provided with a flat cut edge that may be inserted into the slit of the direction controller, and a second side provided with an arcuate edge that is rested on an outer edge of the shaft of the ratchet wheel. Thus, the direction controller may be directly mounted on the drive head, so that the ratchet wrench has a simplified construction and may be assembled and disassembled easily and conveniently.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: March 23, 2004
    Inventor: Yu Tang Chen
  • Publication number: 20040025645
    Abstract: A ratchet tool includes a head with a toothed driving member and a pawl respectively received therein. The pawl has a protrusion which is engaged with a recessed area defined in an underside of a pawl shifting member on one of two sides of the head of the tool, so that the pawl is urged to engage with the toothed driving member by shifting a lever on the pawl shifting member. A spring and a bead are received in a hole defined in a top of the pawl shifting member. A cap is engaged with the head so as to position the driving member and includes an extension which is covered on the pawl shifting member and has two positioning recesses. The bead is engaged with one of the two positioning recesses.
    Type: Application
    Filed: August 7, 2003
    Publication date: February 12, 2004
    Inventors: Tseng Shu-Ying, Hua-Rung Yu
  • Patent number: 6662687
    Abstract: The present application relates to a ratchet wrench with improved force distribution between the pawl and the ratchet gear.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: December 16, 2003
    Assignee: The Stanley Works
    Inventor: Ajay Garg
  • Patent number: 6647833
    Abstract: A ratchet wrench comprises a handle having a head portion, provided with a through hole, a first chamber and a second chamber. A toothed driving device is installed in the through hole for free rotation. A toothed pawl is received in the first chamber to detachably mesh with the driving device. A switching device has an axle member received in the second chamber for free rotation and a turning member. A U-shaped supporting device, has two parallel extending segments inserted into two holes on the axle member of the switching device, and a spring is provided for driving a contacting segment of the supporting device.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: November 18, 2003
    Inventor: Arthur Wu
  • Patent number: 6644148
    Abstract: A wrench comprises a handle and a head extending from the handle. A peripheral wall defining a hole in the head includes a compartment. An annular groove is defined in an end of the peripheral wall defining the hole. The annular groove is partially coincident with the compartment. A pawl is slidably received in the compartment and biased to engage with a gear wheel in the hole. A switching member is partially mounted in the hole for moving the pawl when switching of the ratcheting direction is required. A retainer ring is partially engaged in an annular groove in the switching member and partially engaged in the annular groove of the head. The retainer ring is retained in place by a wall defining the compartment. The switching member is not moved when the pawl moves as a result of free rotation of the wrench.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: November 11, 2003
    Inventor: Bobby Hu
  • Patent number: 6629477
    Abstract: A reversible ratchet wrench includes a handle having a driving head defining a driving chamber, a receiving chamber defined in the handle, a retaining recess defined in the driving chamber and connecting to the receiving chamber, and a driving member secured in the driving chamber and provided with a plurality of tooth-shaped first retaining portions. A direction control device includes a direction control member rotatably mounted in the receiving chamber, a retaining member pivotally mounted in the retaining recess and having a first side provided with a plurality of tooth-shaped second retaining portions meshing with the tooth-shaped first retaining portions, a pressing member rotated by the direction control member and slidably rested on a second side of the retaining member for pivoting the retaining member, and an elastic member urging the pressing member on the second side of the retaining member.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: October 7, 2003
    Assignee: Hand Tool Design Corporation
    Inventors: David Ling, Hsien-Chung Tuan-Mu
  • Patent number: 6609444
    Abstract: A ratchet tool includes a head with a ratchet mechanism received therein which includes a pawl engaged with an engaging ring, and a switch member urges the pawl toward the engaging ring. A top plate is connected to the switch member and a lever extends from the top plate. The top plate closes an operation recess in the head, wherein the operation recess receives the switch member. A tilt ramp is connected between the outside of the head and the neck of the tool. The lever is located in parallel with the tilt ramp.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: August 26, 2003
    Inventor: Chih-Ching Hsien
  • Publication number: 20030145688
    Abstract: A ratchet tool includes a passage defined through the head of the tool and communicating with an interior of the head. A driving member is received in the head and is pivotally connected to a pawl which is engaged with a toothed member in the head. A first engaging member is located on the driving member and a bar movably extends through the passage. The bar has a second engaging member which is engaged with the first engaging member. The pawl is pivoted by pushing the bar.
    Type: Application
    Filed: March 21, 2001
    Publication date: August 7, 2003
    Inventor: Liao I-He
  • Patent number: 6575059
    Abstract: An improved structure of the wrench is disclosed. The wrench relates generally to the end of the handle which is mounted with an open jaw module. The open jaw module has an end protrusion of the handle relatively provided with a smaller path of an insert lever, wherein and an open jaw is mounted. The end of the open jaw is formed into an insert recess of the inset lever. In accordance with the above mentioned specific structure design, the user will may change the size of the open jaw according to his/her size requirements.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: June 10, 2003
    Inventor: Lin-Lang Liu
  • Patent number: 6568299
    Abstract: A ratcheting tool includes a handle and a head with a compartment. A drive member includes a first end, a second end, and a gear wheel formed between the first end and the second end. The gear wheel is rotatably mounted in the compartment and includes a toothed outer periphery. A pawl is mounted in the compartment and includes a toothed side facing the gear wheel teeth. A reversing plate is mounted to the first end of the drive member and pivotable about the rotational axis of the gear wheel between a first position and a second position. The reversing plate comprises a retainer block operably connected to a recess in an upper end of the pawl for moving the pawl between a first ratcheting position and a second ratcheting position.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: May 27, 2003
    Inventor: Bobby Hu
  • Patent number: 6568298
    Abstract: A reversible ratchet head assembly includes a reversal actuator which is received in an opening in an output shaft assembly of a tool. The output shaft assembly carries a pawl which pivots on the output shaft assembly between two positions, one permitting driven rotation of an output shaft of the output assembly in a clockwise direction, and the other permitting driven rotation in a counterclockwise direction. In each position, the pawl permits the tool to be turned in the direction opposite the driven direction for ratcheting operation of the tool. When the direction of rotation is reversed in a powered tool, the reversal actuator moves relative to the output shaft assembly and engages the pawl to automatically switch the pawl from one position to the other. The reversal actuator has two spring-biased fingers which alternatively engage the pawl to move it into one position or the other. The ratchet assembly may also be applied to tools which rely on manual reversal of the pawl.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: May 27, 2003
    Inventor: Frederick L. Zinck
  • Patent number: 6543316
    Abstract: A ratchet wrench includes a wrench body and a switch member that is operatively coupled to a gear engaging member so as to be accessible from an exterior of the wrench body. A spring applies a biasing force to the gear engaging member such that the gear engaging member having one or more engaging teeth engages with gear teeth of a torque receiving gear in intermeshed relation. A mounting element mounts the gear engaging member to the switch element. The gear engaging member is pivotally mounted to the mounting element. The pivotal mounting of the gear engaging member enables the gear engaging member to pivot relative to the mounting element as the gear engaging member moves between a first ratcheting position and a second ratcheting position thereof. Also provided is switch securing structure for securing the switch during operation of the ratchet wrench and a method of making the ratchet wrench.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: April 8, 2003
    Assignee: The Stanley Works
    Inventors: Odee P. Daigle, Nick Savino, David Loftin, Glenn Redding
  • Patent number: 6516691
    Abstract: A ratchet tool in which a receptacle is formed between the head section and the handle. A ratchet block and a spring are disposed in the receptacle. The top face of the receptacle is formed with a slot communicating with the receptacle and outward passing through the main body of the ratchet tool. The top face of the ratchet block is formed with an insertion section in which a driving block is inlaid. The driving block has a driving rod extending through and out of the slot to screw with a push button. By means of pushing the push button, the driving rod is linearly moved within the slot, whereby the driving block drives the ratchet block to change the wrenching direction of the ratchet tool.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: February 11, 2003
    Inventor: Hung Yin Wei
  • Patent number: 6516692
    Abstract: A pawl controlling device for a ratchet tool includes a V-shaped spring which is secured to a plate which is movably inserted into a slot of the tool and two distal ends of the spring are respectively engaged with two concavities of a pawl. The pawl is shifted by either of the two distal ends of the spring when moving the plate.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: February 11, 2003
    Inventor: Chih-Ching Hsien
  • Patent number: 6516690
    Abstract: A ratchet tool includes an engaging member rotatably received in the head of the tool and a pawl is engaged with the toothed outer periphery of the engaging member. A notch is defined in a side opposite to the toothed surface of the pawl and one of two ends of the pawl is removably engaged with the inner periphery of the head. A selection member is received in the head and has a receiving hole for receiving a pin and a second spring therein. The pin is biased by the second spring and engaged with the notch. A protrusion extends from the selection member and a ball received in a recess in the inner periphery of the head is engaged with the protrusion.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: February 11, 2003
    Inventor: Yu Tang Chen
  • Patent number: 6513409
    Abstract: The present invention relates to a ratchet wrench structure including a wrench body, a ratchet wheel, a pawl member, and a control knob. The wrench body has a drive head formed with an operation space for receiving the ratchet wheel, a control space for receiving the control knob, a connecting space between the operation space and the control space for receiving the pawl member. The pawl member is provided with a control spring that is provided with a control ring. The control knob has a control rod is passed through the control ring of the control spring, for moving and displacing the control ring of the control spring.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: February 4, 2003
    Inventor: Daniel Lee
  • Patent number: 6499380
    Abstract: A reversible ratchet wrench includes a ring-shaped head with first teeth defined in an inner periphery thereof and an engaging ring is rotatably received in the head. A pawl is movably engaged with a surface defined in an outer periphery of the engaging ring and has second teeth for being engaged with the first teeth in the head. A control disk is connected to the pawl and rotatably located on a second surface of the head. A fixing ring is engaged with a neck extending from the engaging ring to position the control disk in position. The pawl is shifted by rotating the control disk.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: December 31, 2002
    Inventor: Ching Jih Hsiao
  • Publication number: 20020194965
    Abstract: A ratchet tool includes an engaging member rotatably received in the head of the tool and a pawl is engaged with the toothed outer periphery of the engaging member. A notch is defined in a side opposite to the toothed surface of the pawl and one of two ends of the pawl is removably engaged with the inner periphery of the head. A selection member is received in the head and has a receiving hole for receiving a pin and a second spring therein. The pin is biased by the second spring and engaged with the notch. A protrusion extends from the selection member and a ball received in a recess in the inner periphery of the head is engaged with the protrusion.
    Type: Application
    Filed: June 20, 2001
    Publication date: December 26, 2002
    Inventor: Yu Tang Chen
  • Patent number: 6481316
    Abstract: A ratchet tool includes a handle and a head in which an engaging member is received therein and a pawl is engaged with the engaging member. A link is pivotably received in the handle. A first end of the link is engaged with the pawl and a second end of the link is connected to a control member which is rotatably mounted to the handle. An intermediate portion of said link is pivotally connected to a base member in the handle.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: November 19, 2002
    Inventor: I-He Liao
  • Patent number: 6457389
    Abstract: A wrench includes a handle and a head extended from the handle. The handle comprises a compartment for rotatably receiving a switch member and a cavity having a first end communicated with the compartment and a second end communicated with a hole of the head. A positioning device cooperates with two positioning grooves in the compartment of the handle for retaining the switch member in one of two positions corresponding to two opposite ratcheting directions of the wrench. A biasing device cooperates with a pawl in the cavity of the handle in response to the position of the switch member to thereby bias the pawl to be selectively engaged with a drive member rotatably received in the hole of the head.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: October 1, 2002
    Inventor: Bobby Hu
  • Patent number: 6457387
    Abstract: A ratcheting tool includes a handle and a head with a compartment. A drive member includes a first end extended beyond the compartment, a second end extended beyond the compartment, and a gear wheel formed between the first end and the second end. The gear wheel is rotatably mounted in the compartment and includes a toothed outer periphery. A pawl is mounted in the compartment and includes a toothed side facing the gear wheel teeth. The toothed side of the pawl includes a first teeth portion having a first center of curvature and a second teeth portion having a second center of curvature located at a position different from the first center of curvature. A ring is mounted in the compartment and around the first end of the drive member. The ring is operably connected to the pawl such that the ring and the pawl are pivotable about a rotational axis of the gear wheel and that the pawl is movable in a radial direction relative to the ring.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: October 1, 2002
    Inventor: Bobby Hu
  • Patent number: 6457388
    Abstract: A ratchet wrench includes a wrench body having a drive head defining a first receiving space, a second receiving space, and a third receiving space. A ratchet wheel is rotatably mounted in the first receiving space and is provided with first teeth. A pawl member is movably mounted in the second receiving space and is provided with second teeth detachably meshing with the first teeth of the ratchet wheel. A control member includes a rotation cylinder rotatably mounted in the third receiving space, a linking lever secured on a first end of the rotation cylinder and pivotally mounted on the pawl member for moving the pawl member to engage with or detach from the ratchet wheel, and a drive handle secured on a second end of the rotation cylinder for driving the rotation cylinder to rotate.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: October 1, 2002
    Inventor: Ching Chen
  • Patent number: 6453779
    Abstract: A reversible ratchet-type wrench includes a handle and a head extended from the handle. A web defined between the handle and the head includes a cavity communicated with a hole of the head and a receiving hole communicated with the cavity. An inner periphery defining the receiving hole includes a first positioning notch and a second positioning notch. A pawl is mounted in the cavity and includes a first side with teeth for meshing with teeth of a drive member rotatably mounted in the hole of the head. A switch member includes a turn-piece outside the receiving hole of the web for manual operation. The switch member further includes a positioning section extending from the turn-piece and a switching section extending from the positioning section. The positioning section is rotatably received in the receiving hole of the web and has a positioning member retained in one of the first positioning notch and the second positioning notch of the receiving hole of the web.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: September 24, 2002
    Inventor: Bobby Hu
  • Patent number: 6446530
    Abstract: A ratchet wrench comprises a main body provided with a disposing portion and a receiving cell. A wrenching member is provided with a first toothed portion and is pivoted in the disposing portion of the main body. An arresting member is provided with a second toothed portion and is disposed in the receiving cell such that the second toothed portion is engageable with the first toothed portion. The arresting member and the wrenching member are urged by a first resilient member which serves to provide the arresting member with a spring force enabling the wrenching member to be turned unidirectionally. The arresting member and the wrenching member are further urged by a second resilient member which serves to provide the arresting member with a spring force enabling a greater area of the second toothed portion of the arresting member to be meshed with the first toothed portion of the wrenching member.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: September 10, 2002
    Inventor: Jong-Shing Chang
  • Patent number: 6435062
    Abstract: A wrench includes a driving head having an opening and a chamber and a cavity for receiving a gear and a pawl and an actuator. The actuator is coupled to the pawl with a spring for moving the pawl to control the operating direction of the gear. A spring blade is received in the cavity of the driving head and includes a projection engaged with the actuator for positioning the actuator to the driving head. The driving head has one or more cusps for engaging with the spring blade and for preventing the spring blade from rotating relative to the driving head.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: August 20, 2002
    Assignee: The Stanley Works
    Inventor: Frank McCann
  • Patent number: 6431030
    Abstract: An improved adjusting structure for a ratchet wrench having a tool handle. One end of the tool handle is provided with an open chamber sealed by a seal piece. The chamber is provided with a trigger structure including: a ratchet wheel disposed at an end portion of the chamber; a positioning groove provided in a wall of another end portion of the chamber; a trigger block having one end portion disposed in the positioning groove, the other end portion and the ratchet wheel being provided with two confronting toothed faces, the trigger block being swingable left and right in the positioning groove; and a trigger structure disposed outside the chamber and being operable to control the trigger block such that one of the toothed faces engages the ratchet wheel.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: August 13, 2002
    Inventors: Wen-Jin Kuo, Wen-Chin Kuo
  • Patent number: 6431031
    Abstract: A ratcheting tool includes a handle and a head with a compartment. A drive member includes a first end extended beyond the compartment, a second end extended beyond the compartment, and a gear wheel formed between the first end and the second end. The gear wheel is rotatably mounted in the compartment and includes a toothed outer periphery. A pawl is mounted in the compartment and includes a toothed side facing the gear wheel teeth. A ring is mounted in the compartment and around the first end of the drive member. The ring is operably connected to the pawl such that the ring and the pawl are pivotable about a rotational axis of the gear wheel and that the pawl is movable in a radial direction relative to the ring. A reversing plate is mounted to the first end of the drive member and pivotable about the rotational axis of the gear wheel between a first position and a second position.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: August 13, 2002
    Inventor: Bobby Hu
  • Patent number: 6415691
    Abstract: A ratchet wrench structure includes a wrench body defining a receiving hole receiving a ratchet wheel and a receiving recess receiving a locking pawl, a resting block, and two elastic members. The locking pawl has a first side formed with locking teeth engaging the engaging teeth of the ratchet wheel, and a second side formed with an arcuate inner face. The resting block has a first end rested on the arcuate resting face of the receiving recess, and a second end formed with a resting end rested on the arcuate inner face of the locking pawl. The two elastic members received in two sides of the resting block, wherein one elastic member is rested on the arcuate resting face of the receiving recess, and the other elastic member is rested on the arcuate inner face of the locking pawl.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: July 9, 2002
    Inventor: Mu Lin Chen
  • Patent number: 6415690
    Abstract: A spanner has a handle, a head frame connected to the handle, a drive head device, a pair of reinforced plates, and a pair of arm plates. The head frame has a pair of parallel panels, and a spacing formed between the parallel panels. Each parallel panel has a first pivot hole, a second pivot hole, and a third pivot hole. The reinforced plates and the arm plates are inserted in the spacing of the head frame. Each arm plate has a square hole and a round hole. Each reinforced plate has a round aperture and a circular aperture. The drive head device has a round head. The round head of the drive head device passes through the first pivot hole of each panel and the square hole of each arm plate. A gasket is disposed on one of the panels. A bolt passes through the gasket to be engaged with the round head of the drive head device. A first pin fastens each panel, each reinforced plate, and each arm plate pivotally. A second pin fastens each panel and each reinforced plate pivotally.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: July 9, 2002
    Inventor: Chung-Jeng Yang
  • Patent number: 6408722
    Abstract: A ratchet wheel mounting arrangement for wrench is constructed to include a wrench body with a box at one end, the box of the wrench body having a top inside annular locating groove and a bottom inside annular locating groove, a ratchet wheel mounted in the box, the ratchet wheel having an outward bottom flange engaged into the bottom inside annular locating groove of the box and a top outside locating groove, a stop block adapted to control the direction of rotation of the ratchet wheel, a cover plate put in the top inside annular locating groove of the box, the cover plate having an annular inside locating groove, and a C-shaped retainer ring fastened to the top outside locating groove of the ratchet wheel and the annular inside locating groove of the cover plate to secure them in place.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: June 25, 2002
    Inventor: Yu-Tang Chen
  • Patent number: 6389931
    Abstract: An extension between a driving tool and a driven member which has a hollow body with external gear teeth on one end which is releasably retained in the driving tool. The second end of the body has internal teeth which cooperate with external teeth on the driven member. Also, in the second end of the body is a retaining ring to releasably retain the member to be driven. A sleeve is slidingly received in the body. The sleeve is longitudinally slidable within the body from a first position in which the sleeve is slid fully inwardly to eject the driven member and a second position in which the sleeve is slid outwardly from the body when the driven member is inserted.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: May 21, 2002
    Assignee: Hand Tool Design Corporation
    Inventors: Dana L. Delaney, Robert L. Arnold, Kenneth Taggart, James A. Van Lenten
  • Patent number: 6382052
    Abstract: A ratchet tool includes a ring-shaped head in which a toothed member is rotatably received and a pawl is received in a recess in the head and engaged with the toothed member. A chamber is defined beside the ring-shaped head and a control member is received in the chamber. The control member has a protrusion which is engaged with the notch of the pawl. A curved slot is defined through the control member and a shifting lever is connected to the control member. A torsion spring has a leg thereof fixedly connected to the control member and the other leg of the torsion spring is located in the curved slot.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: May 7, 2002
    Inventor: Shwu Ruu Chen
  • Patent number: 6314839
    Abstract: The reversible rachet wrench which includes: a support body having a head portion and a handle support portion having a cylindrically shaped section; a rachet wheel having teeth extending around the perimeter thereof; a pawl member; a pivot member; and a rotatable handle. The pawl member, which is pivotally supported by the head portion, includes a pair of spaced apart teeth engaging members, which are alternatively engagable with the teeth on the rachet wheel. The pivot member, pivotally supported on the support body, includes first and second ends and an intermediate pivot point. The first end includes a means for engaging the coupling means provided on the pawl member. The second end includes a means for engagement with the rotatable handle.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 13, 2001
    Inventor: James M. Carter
  • Publication number: 20010035074
    Abstract: A reversible ratchet-type wrench includes a handle and a head extended from the handle. A web defined between the handle and the head includes a cavity communicated with a hole of the head and a receiving hole communicated with the cavity. An inner periphery defining the receiving hole includes a first positioning notch and a second positioning notch. A pawl is mounted in the cavity and includes a first side with teeth for meshing with teeth of a drive member rotatably mounted in the hole of the head. A switch member includes a turn-piece outside the receiving hole of the web for manual operation. The switch member further includes a positioning section extending from the turn-piece and a switching section extending from the positioning section. The positioning section is rotatably received in the receiving hole of the web and has a positioning member retained in one of the first positioning notch and the second positioning notch of the receiving hole of the web.
    Type: Application
    Filed: March 21, 2001
    Publication date: November 1, 2001
    Inventor: Bobby Hu