Patents by Inventor Sang-Yuan Liao

Sang-Yuan Liao 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).

  • Structure for rotating and locating screwdriver handle
    Patent number: 6405620
    Abstract: A screwdriver comprises a handle which is provided with a head end portion and a grip portion pivoted with the head end portion. The head end portion has a pivoting block which is provided with an axial slide slot for receiving a slide block. A spring is disposed between the slide block and the axial slide slot. A press block is joined with the slide block such that the press block is put through an insertion hole extending through the axial slide slot. The grip portion is provided with a receiving space for accommodating a retaining plate having a plurality of toothed sots. The slide block is controlled by the press block to engage or disengage the toothed slots of the retaining plate, thereby adjusting and locating the application force angle of the grip portion.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: June 18, 2002
    Inventor: Sang-Yuan Liao
  • Structure for rotating and locating screwdriver handle
    Publication number: 20010052275
    Abstract: A screwdriver comprises a handle which is provided with a head end portion and a grip portion pivoted with the head end portion. The head end portion has a pivoting block which is provided with an axial slide slot for receiving a slide block. A spring is disposed between the slide block and the axial slide slot. A press block is joined with the slide block such that the press block is put through an insertion hole extending through the axial slide slot. The grip portion is provided with a receiving space for accommodating a retaining plate having a plurality of toothed sots. The slide block is controlled by the press block to engage or disengage the toothed slots of the retaining plate, thereby adjusting and locating the application force angle of the grip portion.
    Type: Application
    Filed: June 14, 2001
    Publication date: December 20, 2001
    Inventor: Sang-Yuan Liao
  • Handle of screwdriver
    Patent number: D446435
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: August 14, 2001
    Inventor: Sang-Yuan Liao