Patents by Inventor Joseph M. Crowley, Jr.

Joseph M. Crowley, Jr. 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: 6350015
    Abstract: The systems and methods of the present invention operate by magnetically driving a fluid ejector. In various exemplary embodiments, a primary coil and a secondary coil are situated in the ejector. The ejector has a movable piston usable to eject fluid through a nozzle hole. The piston may be resiliently mounted and biased to an at-rest position. A drive signal is applied to cause current to flow in the primary coil. The current flow generates a magnetic field that induces a current in the secondary coil. Either the primary coil or the secondary coil or associated with the piston and the other is associated with a fixed structure of the ejector. As a result, a magnetic force is generated that pushes the piston either toward a faceplate so that a drop of fluid is ejected through the nozzle hole in the faceplate or away from the faceplate so that fluid fills in a fluid chamber between the piston and the faceplate.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: February 26, 2002
    Assignee: Xerox Corporation
    Inventors: Arthur M. Gooray, George J. Roller, Joseph M. Crowley, Jr., Paul C. Galambos, Frank J. Peter, Kevin R. Zavadil, Richard C. Givler, D. Russell Humphreys, Jeffry J. Sniegowski