Patents by Inventor Liao I-He

Liao I-He has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6722233
    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: Grant
    Filed: March 21, 2001
    Date of Patent: April 20, 2004
    Inventor: Liao I-He
  • 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: 6295896
    Abstract: A socket wrench includes a head with two engaging rods respectively extending from two sides of the head. Each engaging rod has a disk connected thereto and a spring is connected between the two disks. A release pin extends through the two engaging rods and has two notches for respectively receiving two balls embedded in the two engaging rods. A pawl member is pivotally received in the head and engaged with either one of the two disks. The two engaging rods are connected to two sockets with different sizes.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: October 2, 2001
    Inventor: Liao I-He
  • Patent number: 6260449
    Abstract: A ratchet tool includes a head and a toothed member is rotatably received in an interior of the head. An output shaft extends from the toothed member. A frame having two plates is pivotably received in the interior of the head and one of the two plates has a slot defined therethrough. A pawl member received in between the two plates of the frame and a toothed curve surface is defined in a first end of the pawl member so as to engage with the toothed member, and a rib extends from a second end of the pawl member. A spring and a ball are received in the frame and the ball is urged against the second end of the pawl member. A boss extends from the pawl member and is movably received in the slot so as to allow the pawl member to disengage from the toothed member when the output shaft is remained still while the tool is rotated.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: July 17, 2001
    Inventor: Liao I-He
  • Patent number: 6257097
    Abstract: A ratchet tool includes a head in which a disk is engaged and the disk has an engaging member extending from an end of the head. A flange extends from the disk and the flange has toothed inner periphery. A toothed rotator is engaged with the toothed inner periphery of the disk and located eccentrically to the a center of the disk. A ratchet device is received in a recess in an inner periphery of the head and includes a pawl member which is engaged with the toothed rotator. A number of the teeth of the toothed inner periphery of the disk is multiple times of the teeth of the rotator. The pawl member is rotated multiple revolutions while the disk is rotated one revolution. By this way, the ratchet tool is operated with less force.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: July 10, 2001
    Inventor: Liao I-He