Patents by Inventor Christophe Gostomski

Christophe Gostomski 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 circuit for a public works vehicle and vehicle comprising one such circuit
    Patent number: 7856819
    Abstract: The invention relates to a hydraulic circuit (20) for public works vehicles. The circuit comprises: a pump (21) which is driven by a heat engine (22) using a load sensing technique; a hydraulic motor (10) which is used to move one part of the vehicle (8) and a set of hydraulic actuators (12-14); at least one distributor (29) which supplies the hydraulic actuators (12-13) in a controlled manner; and a device (45) for cooling the fluid circulating through the circuit. The inventive circuit is characterised in that it comprises: a pressure-reducing device (33) which is connected to the outlet of the pump (21) and which delivers a first pressure level, said device (33) being connected to the feed port (34) of the hydraulic motor (10); and an assembly which connects a check valve (40) and a calibrated orifice (41) in parallel, said assembly being connected downstream of the feed port (34) of the hydraulic motor and the return line (36) of the distributor (29) and upstream of the cooling device (45).
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: December 28, 2010
    Assignee: Volvo Compact Equipment SAS
    Inventors: Jean-Marc Chirpaz, Philippe Charvieux, Christophe Gostomski
  • Hydraulic Circuit for a Public Works Vehicle and Vehicle Comprising One Such Circuit
    Publication number: 20080196949
    Abstract: The invention relates to a hydraulic circuit (20) for public works vehicles. The circuit comprises: a pump (21) which is driven by a heat engine (22) using a load sensing technique; a hydraulic motor (10) which is used to move one part of the vehicle (8) and a set of hydraulic actuators (12-14); at least one distributor (29) which supplies the hydraulic actuators (12-13) in a controlled manner; and a device (45) for cooling the fluid circulating through the circuit. The inventive circuit is characterised in that it comprises: a pressure-reducing device (33) which is connected to the outlet of the pump (21) and which delivers a first pressure level, said device (33) being connected to the feed port (34) of the hydraulic motor (10); and an assembly which connects a check valve (40) and a calibrated orifice (41) in parallel, said assembly being connected downstream of the feed port (34) of the hydraulic motor and the return line (36) of the distributor (29) and upstream of the cooling device (45).
    Type: Application
    Filed: May 27, 2005
    Publication date: August 21, 2008
    Inventors: Jean-Marc Chirpaz, Philippe Charvieux, Christophe Gostomski