Patents by Inventor Zhiyu Dai

Zhiyu Dai 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).

  • Hydraulic jack for long-term support
    Patent number: 8333365
    Abstract: The present invention discloses a hydraulic jack for long-term support. The hydraulic jack for long-term support includes a base, a housing, an oil cylinder, a piston rod, a top cap, a pump body, a pump core, a handle, a press handle, an oil return valve, a press cap and a slit nut. The slit nut surrounds the piston rod and engages with the piston rod via screw threads. The press cap is disposed on upper ends of the slit nut and the top cap and surrounds the piston rod. The present invention can achieve safe and reliable lifting operation.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 18, 2012
    Inventor: Zhiyu Dai
  • HYDRAULIC JACK FOR LONG-TERM SUPPORT
    Publication number: 20100078612
    Abstract: The present invention discloses a hydraulic jack for long-term support. The hydraulic jack for long-term support includes a base, a housing, an oil cylinder, a piston rod, a top cap, a pump body, a pump core, a handle, a press handle, an oil return valve, a press cap and a slit nut. The slit nut surrounds the piston rod and engages with the piston rod via screw threads. The press cap is disposed on upper ends of the slit nut and the top cap and surrounds the piston rod. The present invention can achieve safe and reliable lifting operation.
    Type: Application
    Filed: December 11, 2008
    Publication date: April 1, 2010
    Inventor: Zhiyu Dai