Patents by Inventor Jerry W. Scherfenberg

Jerry W. Scherfenberg 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).

  • Butterfly valves
    Patent number: 4836499
    Abstract: The present invention comprises a transport system having an annular inflatable seal which has an annular interior domed portion which expands as an integral unit until it contacts the edge of a butterfly valve which engages the domed portion to form a slight recess in the annular seal which provides an airtight and locking seal with the annular seal having a pair of annular resilient legs operable to return the annular interior domed portion to its original position to permit the butterfly valve to be opened.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: June 6, 1989
    Assignee: Dynamic Air Inc.
    Inventors: James R. Steele, Jerry W. Scherfenberg
  • Rotary diverter valves
    Patent number: 4252479
    Abstract: A pneumatic conveyor tube switch operable for diverting materials from a pneumatic conveying line to secondary locations with the rotating diverter valve including a band bearing and a pair of inflatable seals to permit rotation of a central tube and to confine the material within the pneumatic conveying lines of the conveying system.
    Type: Grant
    Filed: August 15, 1979
    Date of Patent: February 24, 1981
    Assignee: Dynamic Air Inc.
    Inventor: Jerry W. Scherfenberg