Patents Assigned to Oil Equipment Manufacturing, LLC
  • Audible fill level alarms for liquid storage vessels
    Patent number: 7497185
    Abstract: An audible fill level alarm is provided. The alarm includes a whistle body having a lower whistle hole, a whistle-tube depending from said whistle body, and a whistle disk having an upper whistle hole. The whistle disk and the whistle body define a whistle chamber that is conical in shape.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: March 3, 2009
    Assignee: Oil Equipment Manufacturing, LLC
    Inventors: Einar P. Gudjohnsen, Peter J. Shukis