Patents by Inventor H. Allan Woodbury

H. Allan Woodbury 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).

  • Leak test system
    Patent number: 5827950
    Abstract: A leak test system is disclosed for a double block and bleed valve arrangement, the system including a second vent valve disposed along the bleed line and a secondary gas supply line connected to the bleed line for introducing gas at a known pressure into the bleed line to test the valves and ensure that they are not leaking. A pressure transducer is positioned to monitor the pressure within the bleed line. The pressure transducer is in communication with a processor which generates an alarm if the pressure in the bleed line changes, thereby indicating a leak. A method for testing each valve in the arrangement is also disclosed.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: October 27, 1998
    Assignee: Woodbury Leak Advisor Co.
    Inventors: H. Allan Woodbury, James R. North
  • Leak test system
    Patent number: 5621164
    Abstract: A leak test system is disclosed for a double block and bleed valve arrangement, the system including a second vent valve disposed along the bleed line and a secondary gas supply line connected to the bleed line for introducing gas at a known pressure into the bleed line to test the valves and ensure that they are not leaking. A pressure switch and pressure gauge monitor are positioned to monitor the pressure within the bleed line. The pressure switch activates an alarm if the pressure in the bleed line changes, thereby indicating a leak. A method for testing each valve in the arrangement is also disclosed.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: April 15, 1997
    Inventors: H. Allan Woodbury, James R. North