Patents Assigned to Saddle Vent Inc.
  • Air conduit for manhole
    Patent number: 4794956
    Abstract: Air ventilation conduit for passing through manhole the conduit having a central section with a cross section having the shape of a crescent or a segment of a circle where it passes through the manhole to provide a minimum of obstruction for men and equipment passing through the manhole, cylindrical outer sections of the conduit for connection to flexible hose, and intermediate sections of varying cross section to connect the central section to the cylindrical outer sections offset away from the manhole.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: January 3, 1989
    Assignee: Saddle Vent Inc.
    Inventors: Russell B. Gordon, Jimmy A. Gordon, Marion W. Smith