Patents by Inventor Yoshiyuki Yamasaki

Yoshiyuki Yamasaki 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).

  • Electric actuator
    Patent number: 6880417
    Abstract: The rotary motion of a ball screw shaft is converted into the rectilinear motion by a ball spline nut provided integrally with displacement members by the aid of an attachment section. Involute splines are engraved on outer circumferential surfaces of spline pistons connected to the displacement members. The spline pistons are slidably meshed with a splined bore of the involute splines formed on an inner wall surface of a frame. The attachment section is displaceable in a longitudinal direction of the frame by the aid of the splined bore and the spline pistons.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: April 19, 2005
    Assignee: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Masaki Miyahara, Yoshiyuki Yamasaki
  • Electric actuator
    Publication number: 20030000322
    Abstract: The rotary motion of a ball screw shaft is converted into the rectilinear motion by a ball spline nut provided integrally with displacement members by the aid of an attachment section. Involute splines are engraved on outer circumferential surfaces of spline pistons connected to the displacement members. The spline pistons are slidably meshed with a splined bore of the involute splines formed on an inner wall surface of a frame. The attachment section is displaceable in a longitudinal direction of the frame by the aid of the splined bore and the spline pistons.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 2, 2003
    Applicant: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Masaki Miyahara, Yoshiyuki Yamasaki