Patents by Inventor John C. Kaufman

John C. Kaufman 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).

  • Patent number: 6059259
    Abstract: A force multiplication mechanism utilizing one or more upwardly open slotted conical disc springs to impart a highly amplified biasing force substantially at the center of the spring upon a force receiving member when the springs are oriented in an unrelieved, but loaded configuration. Two fulcrums are positioned, one each, proximate to upper and lower surfaces of the slotted disc springs. One fulcrum, a high amplification fulcrum, engages the upper surface of the disc spring in the unrelieved configuration causing the downwardly biasing force to be a multiple of the spring's rated force, exemplarily on the order of five times that rated force. A second fulcrum, a low amplification fulcrum, engages the lower surface of the disc spring and acts as a pivot point about which the spring transitions into the relieved configuration causing the downwardly biasing force to be relieved.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: May 9, 2000
    Assignee: Advanced Pressure Technology
    Inventors: Roger J. Gregoire, John C. Kaufman, Peter P. Szyperski