Patents by Inventor Yang Hsing

Yang Hsing 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).

  • Publication number: 20070068579
    Abstract: A non-return valve includes a flap and a valve body. The flap has one side formed with a pivot connector pivotally connected with the valve body and the other side formed integral with a weight. After the flap is pushed open by the pushing force of fluid and the pushing force of the fluid vanishes, the flap without being pressed by any force will be actuated by its own weight to quickly move down and tightly close the valve port of the valve body, having excellent effect of stopping fluid from flowing reversely and leaking out of the port.
    Type: Application
    Filed: September 23, 2005
    Publication date: March 29, 2007
    Inventor: Yang Hsing
  • Patent number: 4766954
    Abstract: There is disclosed a process for producing an optical waveguide comprising contacting at least one optically smooth surface of a single crystal of K.sub.1-x Rb.sub.x TiOMO.sub.4 wherein x is from 0 to 1 and M is P or As with a specified molten salt of at least one of Rb, Cs and Tl at a temperature of from about 200.degree. C. to about 600.degree. C. for a time sufficient to increase the surface index of refraction at least about 0.00025 with respect to the index of refraction of the starting crystal, and cooling the resulting crystal. The product made thereby and a waveguide device using the same are also disclosed.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: August 30, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John D. Bierlein, Lothar H. Brixner, August Ferretti, William Yang-Hsing Hsu