Patents by Inventor James M. Pellegrini

James M. Pellegrini 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).

  • Multi-level liquid level magnetic sensor
    Patent number: 8549911
    Abstract: A liquid level sensor employs a set of axially displaced magnetic sensing switches and a magnet on a float that may rise and fall on liquid level to activate and deactivate the switches. The switches and magnet are configured so that movement of the magnetic float activates a new switch before deactivation of an adjacent previously activated switch. An electronic circuit provides a signal based on the uppermost activated switch to provide a signal that is monotonic with liquid level. The design may be readily implemented using reed switches and a resistive ladder.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: October 8, 2013
    Assignee: Ilinois Tool Works Inc.
    Inventors: Jeffrey P Rudd, James M Pellegrini, Brian J Bonenfant
  • MULTI-LEVEL LIQUID LEVEL MAGNETIC SENSOR
    Publication number: 20110138907
    Abstract: A liquid level sensor employs a set of axially displaced magnetic sensing switches and a magnet on a float that may rise and fall on liquid level to activate and deactivate the switches. The switches and magnet are configured so that movement of the magnetic float activates a new switch before deactivation of an adjacent previously activated switch. An electronic circuit provides a signal based on the uppermost activated switch to provide a signal that is monotonic with liquid level. The design may be readily implemented using reed switches and a resistive ladder.
    Type: Application
    Filed: May 27, 2009
    Publication date: June 16, 2011
    Applicant: ILLINOIS TOOL WORKS INC
    Inventors: Jeffrey P. Rudd, James M. Pellegrini, Brian J. Bonenfant