Patents by Inventor Wu Shiong Lin

Wu Shiong Lin 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 having dual operating directions
    Patent number: 6725503
    Abstract: A door closer includes a housing having one or more bulges, a shaft rotatably received in the housing and having an axle, and one or more resilient rings engaged between the shaft and the housing. The bulges of the housing may be engaged with the resilient rings for preventing the shaft from moving axially relative to the housing. An adjustable spring biasing device may apply a spring biasing force between the housing and the shaft for recovering the shaft relative to the housing. One or more spring biased projections may limit the movement between the shaft and the housing.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: April 27, 2004
    Inventor: Wu Shiong Lin