Patents by Inventor Michael P. Keegan

Michael P. Keegan 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).

  • Publication number: 20140021116
    Abstract: An apparatus and method for creating a high pressure chromatography frit filter assembly is described. The frit is positioned in bondable contact with a polymer ring and then the frit is subject to inductive or targeted heating to cause the frit material to heat the adjacent polymer ring from the inside out. The polymer to liquefies and flow into and past one or more narrowing locations in the pore passageway extending from the surface of the frit to an infusion depth, which provides previously unachieved secure mechanical engagement and adherence and resistance to pressure blow by (break through) and prevents the flow of contaminants between the edge of the frit and the facing edge of the polymer ring in a high pressure or ultra-high pressure chromatography system, where inlet pressures in the range of pressures up to 18,000 PSI are expected.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Applicant: FH INSTRUMENTS, LLC
    Inventors: Robert A. Ford, Vance R. Chin, Kevin A. Medlock, Michael P. Keegan
  • Patent number: 4821518
    Abstract: A booster device for reducing the pedal force required to release the clutch on automotive vehicles. It is capable of either replacing the conventional clutch master cylinder (FIG. 4) or acting as an additional slave and master cylinder (FIGS. 1 to 3). An overcenter mechanism acts on the piston 4 intermediate its end to assist movement in opposite directions beyond a central point. To avoid unbalanced side loads, the overcenter mechanism includes two radially opposed spring (8) biased arms (5) the inner ends of which bear in cup-shaped recesses (6A) on opposite sides of a plug (6) sliding in a transverse bore through the piston (4).
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: April 18, 1989
    Assignee: Clayton Dewandre Co. Ltd.
    Inventors: Ralph Coupland, Michael P. Keegan