Patents Assigned to J. A. Baldwin Manufacturing Co.
  • Drain valve
    Patent number: 4708171
    Abstract: The valve includes a valve member adapted to be moved axially between open and closed positions in a valve housing when the valve member is rotated. The valve member includes a passage for admitting air into a vacuumized vessel and includes a separate passage for draining liquid from the vessel when the valve member is in its open position. An O-ring establishes a primary seal between the valve member and the valve housing and is retained within the housing in all positions of the valve member.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: November 24, 1987
    Assignee: J. A. Baldwin Manufacturing Co.
    Inventor: Roger L. Cudaback