Patents by Inventor David Michael Preston

David Michael Preston 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).

  • Publication number: 20030209399
    Abstract: An improved lubrication system for a ball ramp master clutch and a gear change transmission is disclosed where a lubricant pump is driven by the input shaft to a ball ramp mechanism which, when energized, applies a clamping force on a clutch pack where lubricant is supplied to the pump from a wet sump on the transmission and then lubricant is forced into the clutch assembly and also forced into the gear shaft transmission for eventual return into the sump for recirculation. In an alternate embodiment, a dry sump system is used where the oil flowing out of the transmission is pumped to a dry sump where it is then recirculated to the pump.
    Type: Application
    Filed: May 9, 2002
    Publication date: November 13, 2003
    Applicant: Eaton Corporation
    Inventors: Gregory Joseph Organek, David Michael Preston
  • Publication number: 20030209398
    Abstract: A ball ramp mechanism is used to apply an axial force in the same irregardless of the direction of the flow of torque whenever there is relative rotation between an input shaft and an output hub using unidirectional grooves in both a control ring and an activation ring where a first index plate limits the rotation of the activation ring and a second index plate limits the rotation of the control ring relative to the input shaft. An electrical coil is used to induce a magnetic field in a coil pole to magnetically couple a coil armature to an intermediate plate and the intermediate plate to an activation plate to energize the ball ramp mechanism.
    Type: Application
    Filed: May 9, 2002
    Publication date: November 13, 2003
    Applicant: Eaton Corporation
    Inventors: Gregory Joseph Organek, David Michael Preston
  • Publication number: 20020023816
    Abstract: A ball ramp mechanism is used to apply a clamping load to a clutch pack to rotationally couple an input shaft to an output shaft. The ball ramp mechanism is comprised of a control plate having a control extension radially extending therefrom and an activation plate having an activation extension radially extending therefrom and an intermediate plate disposed between the control extension and the activation extension where the control extension and the activation extension and the intermediate plate are frictionally rotationally coupled upon application of an electromagnetic field generated by a stationary coil acting through a rotating coil armature to activate the ball ramp mechanism. A gap sleeve contacts the control plate and the activation extension to limit the separation between the control extension, the intermediate plate and the activation extension.
    Type: Application
    Filed: August 28, 2001
    Publication date: February 28, 2002
    Applicant: Eaton Corporation
    Inventors: Gregory Joseph Organek, David Michael Preston