Patents by Inventor Stephen M. Bohan

Stephen M. Bohan 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).

  • Shape memory alloy rotary actuator with capacitive position feedback
    Patent number: 7503444
    Abstract: An engine mounted fan clutch is disclosed that utilizes an actuator including two shape memory alloy actuation wires to engage and disengage a valve arm and ultimately the fan. The actuator also includes a controller and a position sensor to accurately determine the position of a valve arm. The fan clutch is part of a control system that continuously monitors the engine parameters and makes adjustments to keep the engine temperature within an acceptable range.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: March 17, 2009
    Assignee: BorgWarner Inc.
    Inventor: Stephen M. Bohan