Patents by Inventor P. J. Hsu

P. J. Hsu 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 of permanent magnetic work holder
    Patent number: 5066936
    Abstract: A new structure of permanent magnetic sucker comprising a base, a magnet conductive disk, a sucker, a support plate spring, an operating lever and a cam, in which the base is made of light-weight aluminum alloy to minimize its weight and load to working bench, the base is designed with two pads to facilitate use of large electromagnetic sucker, the operative lever is fixed through a sleeve to prevent from being seized, and characterized by the application of fusion weld at high temperature for assembly of the magnetic conductive disk and the sucker without any fixing pin or frame.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: November 19, 1991
    Inventor: P. J. Hsu
  • Structure of electromagnetic work holder
    Patent number: 5047742
    Abstract: A new structure of electromagnetic sucker comprising a sucker, a base, an intermediate plate and a solenoid in the form of a knockdown structure for the highest strength and precision and for even distribution of magnet force for the highest magnet attraction by using of the intermediate plate.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: September 10, 1991
    Inventor: P. J. Hsu