Patents by Inventor Ryuuichi Masui

Ryuuichi Masui 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).

  • Ball screw mechanism
    Patent number: 7228751
    Abstract: A ball screw mechanism includes a ball screw shaft of a metal material coaxially connected to a rotary driving source, a nut member of a resin material being screwed onto the ball screw shaft, a plate member fixed to an upper surface of the nut member by screw members, and steel balls which are arranged on a passage formed in the nut member closed by the plate member and which are installed into screw grooves of the ball screw shaft and the nut member.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: June 12, 2007
    Assignee: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Ryuuichi Masui
  • Suction unit
    Patent number: 7004522
    Abstract: A suction unit includes a rotary driving source which is arranged outside of a casing, a substantially oblong circular crank member which is rotatable and which is connected to a rotary shaft of the rotary driving source, a connecting rod which has one end rotatably supported on one end of the crank member, a connecting member on which the other end of the connecting rod is rotatably supported, a shaft which is inserted into the casing and which has a substantially central portion to which the connecting member is connected, and a suction pad which is attached to one end of the shaft and which attracts a workpiece.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: February 28, 2006
    Assignee: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Ryuuichi Masui
  • Ball screw mechanism
    Publication number: 20030192388
    Abstract: A ball screw mechanism includes a ball screw shaft of a metal material coaxially connected to a rotary driving source, a nut member of a resin material being screwed onto the ball screw shaft, a plate member fixed to an upper surface of the nut member by screw members, and steel balls which are arranged on a passage formed in the nut member closed by the plate member and which are installed into screw grooves of the ball screw shaft and the nut member.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 16, 2003
    Applicant: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Ryuuichi Masui
  • Suction unit
    Publication number: 20030147736
    Abstract: A suction unit includes a rotary driving source which is arranged outside of a casing, a substantially oblong circular crank member which is rotatable and which is connected to a rotary shaft of the rotary driving source, a connecting rod which has one end rotatably supported on one end of the crank member, a connecting member on which the other end of the connecting rod is rotatably supported, a shaft which is inserted into the casing and which has a substantially central portion to which the connecting member is connected, and a suction pad which is attached to one end of the shaft and which attracts a workpiece.
    Type: Application
    Filed: February 3, 2003
    Publication date: August 7, 2003
    Applicant: SMC Kabushiki Kaisha
    Inventors: Shigekazu Nagai, Ryuuichi Masui