Patents Assigned to MagDouglas, Inc.
  • Siphonage floor drain and port protector
    Patent number: 5372715
    Abstract: A floor drain and method for its installation, such floor drain incorporating: (1) a flange clamp ring with multiple weep holes, drain tubes with siphonage drain lines, and a tongued and grooved boss, and; (2) a permeable port protector, installed over the floor drain housing and the flange clamp ring, which prevents mortar and debris from entering and clogging drainage holes while allowing water to drain.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: December 13, 1994
    Assignee: MagDouglas, Inc.
    Inventors: Gerald D. Maggard, Gerald L. Evans