Patents by Inventor Jacques Marie Michel Sirven

Jacques Marie Michel Sirven 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 shock absorber
    Patent number: 4054277
    Abstract: A vehicle shock absorber of the hydraulic cylinder and piston type which includes a control valve for limiting pressure of the hydraulic fluid during compression movement to control the damping force of the device in accordance with rate of compression movement above a predetermined rate. The damping force is limited during expansion movement to provide good road-holding ability for the vehicle.
    Type: Grant
    Filed: October 10, 1975
    Date of Patent: October 18, 1977
    Inventor: Jacques Marie Michel Sirven