Patents Assigned to North American Filter Corporation
  • Reusable filter housing with replaceable, disposable filter cartridge
    Patent number: 6409919
    Abstract: Two perforated metal sleeves are secured in radially spaced coaxial relation one within the other between a pair of rigid end caps that are releasably secured to opposite ends of a plurality of rods which support the caps removably and sealingly over opposite ends, respectively, of the sleeves. An annular filter cartridge is releasably secured in the radial space between the sleeves with resilient annular end caps on opposite ends of the cartridge disposed in releasable, sealing engagement with the rigid end caps. Fluid that is to be filtered is delivered to the radial space separating two annular filter elements in the filter cartridge. When one or the other of the end caps is removed from the support rods the cartridge can be removed from between the sleeves and replaced without having to destroy the sleeves or the rigid end caps.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: June 25, 2002
    Assignee: North American Filter Corporation
    Inventor: Stanley P. Tara
  • Filter cartridge with drainable sludge barrier
    Patent number: 6063276
    Abstract: This invention relates generally to filters for removing impurities from liquids, and more particularly to a replaceable filter cartridge having a barrier for preventing contaminants from draining from a spent cartridge, as it is being replaced. The barrier comprises a layer of filter media closely surrounding an inner perforated conducting conduit.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: May 16, 2000
    Assignee: North American Filter Corporation
    Inventor: Richard A Felber
  • Filter cartridge with drainable sludge barrier
    Patent number: 5811002
    Abstract: This invention relates generally to filters for removing impurities from liquids, and more particularly to a replaceable filter cartridge having a barrier for preventing contaminants from draining from a spent cartridge, as it is being replaced. The barrier comprises a layer of filter media closely surrounding an inner perforated conducting conduit.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: September 22, 1998
    Assignee: North American Filter Corporation
    Inventor: Richard A. Felber
  • Fluid filter
    Patent number: 4615803
    Abstract: An improved fluid filter element and a filter medium therefor include a rigid core having a coupling member attached at each end for absorbing axial stress. A filter medium includes a plurality of pockets and first and second neck portions sealingly attached to said coupling member.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: October 7, 1986
    Assignee: North American Filter Corporation
    Inventor: Frederick E. Tarala
  • Fluid filter
    Patent number: RE32851
    Abstract: An improved fluid filter element and a filter medium therefor include a rigid core having a coupling member attached at each end for absorbing axial stress. A filter medium includes a plurality of pockets and first and second neck portions sealingly attached to said coupling member.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: January 31, 1989
    Assignee: North American Filter Corporation
    Inventor: Frederick E. Tarala