Patents by Inventor Ernest E. Yeo

Ernest E. Yeo 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).

  • Exhaust head
    Patent number: 4137953
    Abstract: A coupling head suitable to be supported on a transporting means for coupling an object to be evacuated to a vacuum line. The coupling has a ball valve and a poppet valve for connecting and disconnecting the vacuum and gas pressure to the object. Leaks in the object can be detected by a sensing device actuated by a bellows on the coupling head.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: February 6, 1979
    Assignee: Swanson-Erie Corporation
    Inventor: Ernest E. Yeo