Patents by Inventor Nicaïse Lesther

Nicaïse Lesther 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).

  • External gear hydraulic pump with acoustical insulation
    Patent number: 8133037
    Abstract: The invention concerns an external gear hydraulic pump including a pump body housing rotating pinions that mutually engage. Located on opposite sides of the body are a cover and a support, forming an outlet manifold for high pressure fluid. Acoustic insulation elements damp the vibrations produced by the pinions. The acoustic insulation elements acoustically decouple the pump body from the support.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: March 13, 2012
    Assignee: JTEKT HPI
    Inventors: Francois Fischer, Laurent Graissaguel, Nicaise Lesther
  • Electrically driven pump unit
    Patent number: 7942649
    Abstract: An electrical driven pump unit having two hydraulic pumps and two electric motors that are fitted in such a way as to make it possible to obtain the unit's power by adding together the power of the two motors.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: May 17, 2011
    Assignee: JTEKT HPI
    Inventors: Nicaïse Lesther, Francois Fischer
  • External gear hydraulic pump with acoustical insulation
    Publication number: 20090097992
    Abstract: The invention concerns an external gear hydraulic pump including a pump body housing rotating pinions that mutually engage. Located on opposite sides of the body are a cover and a support, forming an outlet manifold for high pressure fluid. Acoustic insulation elements damp the vibrations produced by the pinions. The acoustic insulation elements acoustically decouple the pump body from the support.
    Type: Application
    Filed: October 8, 2008
    Publication date: April 16, 2009
    Applicant: JTEKT HPI
    Inventors: Francois Fischer, Laurent Graissaguel, Nicaise Lesther
  • Electro-hydraulic power steering assist system for an automobile
    Patent number: 7303044
    Abstract: An electro-hydraulic power steering system for a vehicle includes a booster pump rotated by an electric motor, under control of a computer, as a function of a signal representing speed of the vehicle and a signal representing rate of steering wheel angle change. The computer generates the signal representing the rate of steering wheel angle change by computation from current supplied to the motor to control the booster pump.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: December 4, 2007
    Assignee: Hydroperfect International
    Inventors: Nicaïse Lesther, Francois Caresche, Gabriel Chaigne
  • Electrically driven pump unit
    Publication number: 20070122298
    Abstract: An electrical driven pump unit having two hydraulic pumps and two electric motors that are fitted in such a way as to make it possible to obtain the unit's power by adding together the power of the two motors.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 31, 2007
    Inventors: Nicaise Lesther, Francois Fischer
  • Electro-hydraulic power steering assist system for an automobile
    Publication number: 20050183901
    Abstract: An electro-hydraulic power steering system for a vehicle includes a booster pump rotated by an electric motor, under control of a computer, as a function of a signal representing speed of the vehicle and a signal representing rate of steering wheel angle change. The computer generates the signal representing the rate of steering wheel angle change by computation from current supplied to the motor to control the booster pump.
    Type: Application
    Filed: December 16, 2004
    Publication date: August 25, 2005
    Applicant: Hydroperfect International HPI
    Inventors: Nicaise Lesther, Francois Caresche, Gabriel Chaigne