Patents Represented by Attorney Frank A. Follmer
  • Patent number: 4245952
    Abstract: A centrifugal pump is constructed of a cast iron impeller and corrosion resistant means for providing a minimal clearance space between the impeller and the volute body of the pump in the form of a clearance ring mounted in the volute body to cooperate with a stainless steel tubular insert member cast into the impeller hub. The clearance ring may comprise a bendable ring which may be compressed from its normal condition to fit into a bore in the volute body so as to spring outwardly into its mounted position.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: January 20, 1981
    Assignee: Hale Fire Pump Company
    Inventor: H. Alfred Eberhardt