Patents by Inventor Bernard Coeuret

Bernard Coeuret 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 variable-speed gear motor supplied with fluid and providing a variable torque
    Patent number: 6030196
    Abstract: A variable-speed motor comprising a sun gear (P), at least two planet gears (Si, Si+1), a ring gear (C), an intermediate sector (Zi) between the sides opposite the sun gear (P), opposite the two planet gears (Si, Si+1), and opposite ring gear (C), defining the circulation paths of the drive fluid therewith. The junctions (J(P, Si), J(Si, C), J(Si+1), C), J(P, Si+1)) are impermeable to the drive fluid. The two inlets (Ai, .alpha.i+1) and the two returns (Ri, .rho.i+1) for the drive fluid are provided in sector (Zi) in the vicinity of the junctions; the inlets (Ai, .alpha.i+1) and the returns (Ri, .rho.i+1) are located at two opposite vertices of the quadrilateral.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: February 29, 2000
    Assignee: Institut Francais Du Petrole
    Inventors: Bernard Coeuret, Andre Renot