Patents by Inventor Stewart Page

Stewart Page 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).

  • Vibration generator with a control valve in an inertial body controlled by a wave form shape of fluid flow to the valve
    Patent number: 5136926
    Abstract: A vibration generator including an inertial body and a housing which are relatively movable and where hydraulic fluid is directed into the inertial body through a control valve mounted in the inertial body, the fluid being directed alternately into one or another working chamber which causes oscillation of the housing and any attached load. A wave form shape of pressure or flow rate of the hydraulic fluid flow is detected and used to control the frequency at which the vibration generator oscillates so that the frequency is maintained at a resonant frequency. The device has particular application in a frequency range of 20 Hertz to 1000 Hertz.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: August 11, 1992
    Inventors: David A. Bies, Stewart Page