Patents by Inventor Todd Langston

Todd Langston 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).

  • Accumulator utilizing housing case pressure
    Patent number: 6418714
    Abstract: The present invention meets these objectives providing an IDG hydraulic system that utilizes in flow series arrangement a scavenge pump, a spool valve and a boost pump. When spool valve detects an interruption in the supply pressure to the boost pump due to an adverse “g” condition, it reconfigures the system to a closed loop system. In this mode, the oil returning from the CVT is re-circulated back to the boost pump instead of back to the scavenge pump. Oil lost to leakage is replenished by an oil accumulator that use the gas pressure in the IDG's casing to expel fluid from the accumulator into the recirculating flow.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: July 16, 2002
    Assignee: Honeywell International, Inc.
    Inventors: Andrew T. Johnson, Todd Langston, Daniel Navarro
  • Active hydraulic control pressure system for adverse “G” flight conditions
    Patent number: 6367248
    Abstract: An hydraulic control system for an IDG includes in flow series arrangement a scavenge pump, a spool valve and a boost pump. When the spool valve detects an interruption in the supply pressure to the boost pump due to an adverse “g” condition, it reconfigures the system to a closed loop system. In this mode, the oil returning from the CVT is re-circulated back to the boost pump instead of back to the scavenge pump. A small accumulator of oil is used to make up for leakage in the system.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: April 9, 2002
    Assignee: Honeywell International Inc.
    Inventors: Todd Langston, Don Salafia