Patents Examined by C. D. Dickens
  • Pressure gauge having a dampener mechanism
    Patent number: 6651507
    Abstract: Various embodiments are disclosed of dampening apparatus for a pressure gauge in which a short length of sleeve, ferrule, hub or thimble encircles a pointer shaft in a close but loose fit relation defining a clearances packed with a high viscosity dampening agent such that it serves to decelerate and cushion any sudden shock or pulsation force that would otherwise be transmitted from the pointer shaft to a pointer registering values of pressure of fluid pressure being monitored.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: November 25, 2003
    Assignee: Dresser, Inc.
    Inventors: John C. Hamma, Walter J. Ferguson, Jeffrey T. Blake, Michael J. Maloney, Louis A. Rosen