Patents by Inventor Tomohiro NAKAMAE

Tomohiro NAKAMAE 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).

  • Door closer
    Patent number: 9416578
    Abstract: Disclosed is a door closer that can easily adjust the spring force of a return spring. A piston 2 moves toward a first oil chamber 15 upon a door opening operation and moves toward a second oil chamber 16 upon a door closing operation. A return spring 50 is located on the same line as the piston 2. The return spring 50 is interposed between a spring retaining seat on a fixed side close to a main shaft 3 and a spring retaining seat on a moving side distant from the main shaft 3. The return spring 50 is compressed by the spring retaining seat on the moving side moving closer to the spring retaining seat on the fixed side upon the door opening operation and then stores the closing force.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: August 16, 2016
    Assignee: RYOBI LTD.
    Inventor: Tomohiro Nakamae
  • DOOR CLOSER
    Publication number: 20150345202
    Abstract: Disclosed is a door closer that can easily adjust the spring force of a return spring. A piston 2 moves toward a first oil chamber 15 upon a door opening operation and moves toward a second oil chamber 16 upon a door closing operation. A return spring 50 is located on the same line as the piston 2. The return spring 50 is interposed between a spring retaining seat on a fixed side close to a main shaft 3 and a spring retaining seat on a moving side distant from the main shaft 3. The return spring 50 is compressed by the spring retaining seat on the moving side moving closer to the spring retaining seat on the fixed side upon the door opening operation and then stores the closing force.
    Type: Application
    Filed: November 15, 2013
    Publication date: December 3, 2015
    Inventor: Tomohiro NAKAMAE