Patents by Inventor Francois Duveau

Francois Duveau 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).

  • Apparatus for the accumulation and release of energy
    Patent number: 4352298
    Abstract: Input torque, at a comparatively low energy level and preferably delivered constantly, is converted to comparatively high energy output torque pulses by storing the applied torque in a leaf spring which, in its unstressed state, is elastically deformed. Energy is accumulated in the spring by twisting it about its longitudinal axis through rotating a first end thereof. Stored energy is released by periodically allowing the second end of the spring to rotate.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: October 5, 1982
    Assignee: Pompes Essa Mico
    Inventor: Francois Duveau
  • Pressure limiter device
    Patent number: 4003398
    Abstract: A pressure limiting device for protecting a fluid pressure circuit involves a stack of elastomeric washers, and each of the washers has a slit through which fluid can bleed to reduce the fluid pressure below a critical value; the slits are normally closed and so prevent substantial fluid flow, but are able to open to pass fluid when the pressure reaches a critical value at which the pressure distorts the stack of washers.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: January 18, 1977
    Inventor: Francois Duveau
  • Fluid distribution apparatus and method
    Patent number: 3970413
    Abstract: Systems for delivering fluid at substantially constant pressure to consuming loads which exhibit widely varying demands. The systems employ parallel connected booster pumps which may be operated in either of two rotational directions to provide two output flow rates for each pump.
    Type: Grant
    Filed: December 10, 1973
    Date of Patent: July 20, 1976
    Inventor: Francois Duveau