Patents by Inventor Zongxuan Zhang

Zongxuan Zhang 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).

  • Assembly apparatus for ball screw device, parts supply device and counter device
    Patent number: 7946018
    Abstract: An assembly apparatus for assembling a ball screw device includes a support block, a nut arranged in a longitudinal direction, a nut reception base that arranges the nut so that its axial direction towards vertical direction of the assembly apparatus and that supports the nut so as to elevate the nut with respect to the support block, a temporary shaft inserted into an inner diameter side of the nut arranged on the nut reception base and rotatably supported by the support block, an inclined face provided at a forward end portion of the temporary shaft, for guiding balls into the nut raceway groove and a pushing mechanism that has elasticity in the radial direction of the temporary shaft and that pushes balls which are fed into the nut raceway groove by a forward end portion protruding from the outer circumferential face of the temporary shaft.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: May 24, 2011
    Assignee: NSK Ltd.
    Inventors: Shigeo Tokura, Kazuyasu Chiba, Zongxuan Zhang
  • Assembly apparatus for ball screw device, parts supply device and counter device
    Publication number: 20070137349
    Abstract: An assembly apparatus for assembling a ball screw device includes a support block, a nut arranged in a longitudinal direction, a nut reception base that arranges the nut so that its axial direction towards vertical direction of the assembly apparatus and that supports the nut so as to elevate the nut with respect to the support block, a temporary shaft inserted into an inner diameter side of the nut arranged on the nut reception base and rotatably supported by the support block, an inclined face provided at a forward end portion of the temporary shaft, for guiding balls into the nut raceway groove and a pushing mechanism that has elasticity in the radial direction of the temporary shaft and that pushes balls which are fed into the nut raceway groove by a forward end portion protruding from the outer circumferential face of the temporary shaft.
    Type: Application
    Filed: October 12, 2006
    Publication date: June 21, 2007
    Inventors: Shigeo Tokura, Kazuyasu Chiba, Zongxuan Zhang