Patents by Inventor Gerard Hamel

Gerard Hamel 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).

  • Hydraulic system
    Patent number: 8127661
    Abstract: The present invention relates to a hydraulic system that includes a compression chamber capable of being subjected to the pressure of a hydraulic fluid; a piston movable inside the compression chamber along an axis; and at least one sealing gasket disposed between the piston and a wall of the compression chamber, the gasket occupying an axial position that varies circumferentially around the axis in such a manner as to compensate for non-axially symmetrical stresses induced by the pressure of the fluid.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: March 6, 2012
    Assignees: Universite Pierre et Marie Curie, Centre National de la Recherche Scientifique
    Inventors: Stefan Klotz, Gerard Hamel, Joel Frelat
  • HYDRAULIC SYSTEM
    Publication number: 20090091090
    Abstract: The present invention relates to a hydraulic system that includes a compression chamber capable of being subjected to the pressure of a hydraulic fluid; a piston movable inside the compression chamber along an axis; and at least one sealing gasket disposed between the piston and a wall of the compression chamber, the gasket occupying an axial position that varies circumferentially around the axis in such a manner as to compensate for non-axially symmetrical stresses induced by the pressure of the fluid.
    Type: Application
    Filed: December 18, 2006
    Publication date: April 9, 2009
    Applicants: UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Stefan Klotz, Gerard Hamel, Joel Frelat
  • Resin immobilized biocide
    Patent number: 6875797
    Abstract: The present invention relates to a composition comprising: (a) 85% to 99% by weight of a resin selected from the group consisting of Ethylene-Vinyl Acetate-Carbon Monoxide; Styrene-Butadiene-Styrene; Styrene-Maleic Anhydride; Styrene-Methyl Methacrylate; Thermoplastic polyurethane; Ethylene-Vinyl Acetate and Acrylic Rubber; and mixtures thereof; (b) 1% to 15% by weight of a biocide selected from the group consisting of 4,5,-dichloro-2-n-octyl-4-isothiazolone-3-one biocide (DCIOT) and 2-n-octyl-4-isothiazolin-3-one (OIT).
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: April 5, 2005
    Assignee: Rohm and Haas Company
    Inventors: George Harvey Redlich, Roger Gerard Hamel, Nuno Maurice Rei
  • Resin immobilized biocide
    Publication number: 20020169230
    Abstract: The present invention relates to a composition comprising:
    Type: Application
    Filed: February 27, 2002
    Publication date: November 14, 2002
    Inventors: George Harvey Redlich, Roger Gerard Hamel, Nuno Maurice Rei