Patents Assigned to Philadelphia Suburban Water Company
  • Patent number: 4631961
    Abstract: A probe rod is inserted into a water main through a corporation cock. The rod has a plurality of transverse passages parallel to one another and aligned in the direction of flow. Within these transverse passages, in flush relationship to the passage walls, are inserted removable sampling rings. All but one of the rings are of the same material as the inner wall of the main. The remaining ring, used as a control, is a synthetic resin ring. The flush relationship prevents the formation of turbulent eddies at the ends of the rings. Consequently, microbial growth conditions on the rings themselves reliably simulate conditions on the interior wall of the main.Within a tubular extension on the exterior of the corporation cock an O-ring seal is provided. The length of the extension, and the position of the seal, are such that the probe rod can be partially withdrawn beyond the corporation valve without causing any of the transverse passages to pass through the O-ring.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: December 30, 1986
    Assignee: Philadelphia Suburban Water Company
    Inventors: Thomas L. Yohe, Rodney M. Donlan, Karl M. Kyriss