Patents by Inventor Mitsuru Haseda

Mitsuru Haseda 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).

  • Tiltable stool and tiltable lounge chair
    Patent number: 10433644
    Abstract: A tiltable stool includes a seat support, a seat, and a tilt mechanism. The seat is mounted to an upper end of the seat support. The tilt mechanism allows the seat to tilt in a desired direction. The tilt mechanism includes a coiled wave spring, an upper spring retainer and a lower spring retainer, a fastener bolt, and a tilt limiter. The upper spring retainer and the lower spring retainer are disposed opposite each other to sandwich the coiled wave spring therebetween. The fastener bolt pivotably holds the upper spring retainer in position. The tilt limiter is disposed inside the coiled wave spring and is secured to either one of the spring retainers. The tilt limiter includes a conical surface thereon which contacts a contact surface when the seat tilts to a predetermined tilt angle. The upper spring retainer is secured to a lower end of the seat support.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: October 8, 2019
    Assignees: QUALI CO., LTD., CHAIR MEISTER CO., LTD.
    Inventors: Nariaki Kamiya, Toshiharu Okazaki, Mitsuru Haseda
  • TILTABLE STOOL AND TILTABLE LOUNGE CHAIR
    Publication number: 20190116979
    Abstract: A tiltable stool includes a seat support, a seat, and a tilt mechanism. The seat is mounted to an upper end of the seat support. The tilt mechanism allows the seat to tilt in a desired direction. The tilt mechanism includes a coiled wave spring, an upper spring retainer and a lower spring retainer, a fastener bolt, and a tilt limiter. The upper spring retainer and the lower spring retainer are disposed opposite each other to sandwich the coiled wave spring therebetween. The fastener bolt pivotably holds the upper spring retainer in position. The tilt limiter is disposed inside the coiled wave spring and is secured to either one of the spring retainers. The tilt limiter includes a conical surface thereon which contacts a contact surface when the seat tilts to a predetermined tilt angle. The upper spring retainer is secured to a lower end of the seat support.
    Type: Application
    Filed: December 19, 2018
    Publication date: April 25, 2019
    Applicants: QUALI CO., LTD., CHAIR MEISTER CO., LTD.
    Inventors: Nariaki Kamiya, Toshiharu Okazaki, Mitsuru Haseda