Patents by Inventor Steven D. Hardison

Steven D. Hardison 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).

  • Filter element
    Patent number: 7648565
    Abstract: A filter element (102) comprising a filter media (106) and a membrane (114). The filter media (106) filters impurities (e.g., water and/or contaminants) from a liquid (e.g., a liquid fuel initially containing impurities) as the liquid passes from the inlet side (110) to the outlet side (112) of the filter element (102). The membrane (114) is permeable to air and impermeable to the liquid and the impurities. The membrane (114) is positioned to provide a bypass from the inlet side (110) to the outlet side (112) of the filter element whereby air intermixed with the fluid will not accumulate on the inlet side (110) of the filter element (102).
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: January 19, 2010
    Assignee: Parker-Hannifin Corporation
    Inventors: Michael D. Clausen, Peter Popoff, Steven D. Hardison
  • Reversible filter element
    Patent number: 5645718
    Abstract: A fuel filter assembly (10) includes a filter head (12) having a fuel inlet (18) and a fuel outlet (20). A filter element (14) is attached to said filter head. A collection bowl (16) is attached to the filter element. The filter element includes an outer wall (36) with upper and lower turned in edge portions (62, 72). Upper and lower ring shaped members (64, 74) are in abutting contact with said turned in edge portions and are positioned intermediate of said edge portions and end caps (46, 48) of an annular filter medium (38). The end caps include central openings (54) surrounded by circular resilient gaskets (58). The filter element (14) is attachable by either of its ring shaped members to the filter head and collection bowl.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: July 8, 1997
    Assignee: Parker Hannifin Corporation
    Inventors: Steven D. Hardison, Walter H. Stone
  • Fuel filter assembly with reversible element
    Patent number: 5362389
    Abstract: A fuel filter assembly (10) includes a filter head (12) having a fuel inlet (18) and a fuel outlet (20). A filter element (14) is attached to said filter head. A collection bowl (16) is attached to the filter element. The filter element includes an outer wall (36) with upper and lower turned in edge portions (62, 72). Upper and lower ring shaped members (64, 74) are in abutting contact with said turned in edge portions and are positioned intermediate of said edge portions and end caps (46, 48) of an annular filter medium (38). The end caps include central openings (54) surrounded by circular resilient gaskets (58). The filter element (14) is attachable by either of its ring shaped members to the filter head and collection bowl.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: November 8, 1994
    Assignee: Parker Hannifin Corporation
    Inventors: Steven D. Hardison, Walter H. Stone