Patents by Inventor Steven B. Frankel

Steven B. Frankel 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).

  • Combined vacuum baffle and valve for diffusion pump
    Patent number: 4081222
    Abstract: In a vacuum system a baffle-valve acts first as a baffle to reduce the backstreaming of a diffusion pump fluid into the main vacuum chamber being evacuated and secondly it can be used as a valve to provide complete isolation between the diffusion pump and the vacuum chamber. This enables the chamber to be open for service work while the diffusion pump is kept operating for rapid pump down. The foregoing dual use of the baffle/valve increases pumping efficiency because of higher conductance.
    Type: Grant
    Filed: March 4, 1976
    Date of Patent: March 28, 1978
    Assignee: Finnigan Corporation
    Inventors: Ronald D. Smith, Steven B. Frankel, John R. Reeher, Michael S. Story