Patents by Inventor Celso L. Fratta

Celso L. Fratta 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).

  • Coupling device and improved fluid pressure system therefor
    Patent number: 7063198
    Abstract: A coupling device (11) of the type including a clutch assembly (29) actuation of which is responsive to fluid pressure in a clutch piston apply chamber (43), and a series of fluid passages (53,55,57,59) communicating the chamber to a control valve assembly (69). A housing (15) defines a hub portion (61) surrounded by a plenum member (17) carrying two high pressure seals (63;163). The housing is formed such that the outer surface (60) of the hub portion is free of graphite porosity, to improve the life of the seals. Preferably, each of the seals (63;163) has a height/width ratio selected to provide the desired radially inward sealing force, but wherein the seals are still able to be assembled within the respective seal cavities (73,75;173,175).
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: June 20, 2006
    Assignee: Eaton Corporation
    Inventors: Celso L. Fratta, Robert J. Kyle, Keith E. Morgensai, Patrick J. McMillan