Patents by Inventor Douglas D. Long

Douglas D. Long 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).

  • Lubrication system level control
    Patent number: 8448750
    Abstract: A machine lubrication system that includes an assembly for sensing the level of lubricant in the reservoir, the reservoir including a follower that travels axially within the reservoir and substantially conforms to an inner cross-sectional dimension thereof, a magnet being attached to the follower for actuation of a plurality of magnetically actuated switches. The system may include a first and second level sensor, which may be independently connected to one or more power sources, where the first level sensor may be associated with an operator station, and the second level sensor may be associated with a remote indicator.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: May 28, 2013
    Assignee: Caterpillar Inc.
    Inventors: Susan J. Gaugush, Ted J. Loeffelholz, James Frances Blubaugh, Douglas D. Long
  • Lubrication system level control
    Publication number: 20090078507
    Abstract: A machine lubrication system that includes an assembly for sensing the level of lubricant in the reservoir, the reservoir including a follower that travels axially within the reservoir and substantially conforms to an inner cross-sectional dimension thereof, a magnet being attached to the follower for actuation of a plurality of magnetically actuated switches. The system may include a first and second level sensor, which may be independently connected to one or more power sources, where the first level sensor may be associated with an operator station, and the second level sensor may be associated with a remote indicator.
    Type: Application
    Filed: September 26, 2007
    Publication date: March 26, 2009
    Applicant: Caterpillar Inc.
    Inventors: Susan J. Gaugush, Ted J. Loeffelholz, James F. Blubaugh, Douglas D. Long