Patents by Inventor Allen E. Cederholm

Allen E. Cederholm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pressure filter with vibratory impactor
    Patent number: 4526688
    Abstract: A pressure filter utilizes a vibratory impactor for imparting vertically directed high frequency shock waves to a rigid manifold from which a plurality of rigid filter tubes incorporate a fine mesh sleeve held tightly by spaced elastic bands against a unitary plastic core having inner and outer tubes interconnected by integral web portions.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: July 2, 1985
    Assignee: Industrial Filter & Pump Mfg. Co.
    Inventors: Henry Schmidt, Jr., Allen E. Cederholm, James F. Zievers
  • Filter cake removal method and apparatus
    Patent number: 4289630
    Abstract: The exhaust manifold in a pressure filter is spring mounted and vibrated along a vertical axis to dislodge filter cakes from filter tubes suspended from the manifold.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: September 15, 1981
    Assignee: Industrial Filter & Pump Mfg. Co.
    Inventors: Henry Schmidt, Jr., Allen E. Cederholm, James F. Zievers