Patents by Inventor Shiang-Hwey Lai

Shiang-Hwey Lai 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).

  • Pneumatic cylinder of a pneumatic lever-lift chair, and its assembly process
    Patent number: 5702083
    Abstract: A pneumatic cylinder for use in a pneumatic lever-lift chair, including a cylindrical casing having an inward bottom flange and a plurality of vertically spaced inside annular flanges, a stop plate mounted inside the cylindrical casing and having a plurality of raised portions at the bottom respectively welded to the inward bottom flange of the cylindrical casing by a spot welding machine, and an inner barrel mounted inside the cylindrical casing and having an outward top flange stopped above the top end of the cylindrical casing and a plurality of vertically spaced annular grooves around the periphery respectively forced into engagement with the inside annular flanges of the cylindrical casing.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: December 30, 1997
    Inventor: Shiang-Hwey Lai