Patents by Inventor Chih-Hsien Wong

Chih-Hsien Wong 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).

  • Windshield wiper with an automatic pressure means
    Patent number: 5463790
    Abstract: A windshield wiper includes a master wiper arm, a rubber blade operatively connected to the master wiper arm and a pressure mechanism mounted at a top portion of the master wiper arm for pressing the rubber blade against a windshield. The pressure mechanism includes a wing, a pivot fastened to one side of the wing, and a gear fastened to the pivot. A prestressing mechanism is mounted on the master wiper arm and engaged with the pressure mechanism. This prestressing mechanism includes a gear meshed with the gear of the pressure mechanism, a threaded member fixed to said gear of the prestressing mechanism, an adjusting screw and an elastic element between the threaded member and the adjusting screw. The screw encloses the prestressing mechanism and exerts prestress force to the elastic element, such that the force is transmitted to the gear of the prestressing mechanism via the threaded member.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: November 7, 1995
    Inventors: Xian-Shun Chiou, Chih-Hsien Wong