Patents Assigned to Pella Corp.
  • Storm door with counterbalance
    Patent number: 6640869
    Abstract: A storm door (20) ventilation through a screen (50) by either or both of slidable sashes (92, 93). The storm door may also utilize a flexible member (80) to secure a liner (30, 40, 53, 54) to a side, without the use of mechanical fasteners. Sash weight balancing assemblies are utilized in a three track door.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: November 4, 2003
    Assignee: Pella Corp.
    Inventors: James L. Ralph, Todd N. Stratmoen, David M. Wamre