Pressure Patents (Class 434/53)
  • Systems and methods for aircraft parking brakes with multiple control locations
    Patent number: 9975627
    Abstract: A system for controlling a parking brake system on an aircraft is provided. The system includes a switch interface comprising an enable switch and an activate switch. The parking brake system is configured to switch the state of a parking brake in response to the enable switch and the activate switch being engaged at the same time. A second switch interface also includes an enable switch and an activate switch with the parking brake system configured to switch the state of the parking brake system in response to the second enable switch and the second activate switch being engaged at the same time. The system may also be controlled from a remote and/or virtual location.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: May 22, 2018
    Assignee: GOODRICH CORPORATION
    Inventor: Eric Cahill
  • MEMS device with stress isolation and method of fabrication
    Patent number: 8138007
    Abstract: A MEMS device (20) with stress isolation includes elements (28, 30, 32) formed in a first structural layer (24) and elements (68, 70) formed in a second structural layer (26), with the layer (26) being spaced apart from the first structural layer (24). Fabrication methodology (80) entails forming (92, 94, 104) junctions (72, 74) between the layers (24, 26). The junctions (72, 74) connect corresponding elements (30, 32) of the first layer (24) with elements (68, 70) of the second layer (26). The fabrication methodology (80) further entails releasing the structural layers (24, 26) from an underlying substrate (22) so that all of the elements (30, 32, 68, 70) are suspended above the substrate (22) of the MEMS device (20), wherein attachment of the elements (30, 32, 68, 70) with the substrate (22) occurs only at a central area (46) of the substrate (22).
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: March 20, 2012
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Aaron A. Geisberger
  • Pneumatic generator system for simulating operating conditions of an aircraft
    Patent number: 6955184
    Abstract: A pneumatic function generator system for maintaining a desired pressure and/or a desired rate of pressure change with respect to time. The pneumatic function generator system may include a servo valve for controlling the amount of fluid traveling therethrough, a primary sensor for measuring the pressure of the fluid and for generating an analog signal corresponding to the pressure of the fluid, an analog-to-digital module for converting the analog signal to a digital value, and a digital device for receiving the digital value and, depending on the digital value, generating a control signal that is used to control the opening and closing of the servo valve.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: October 18, 2005
    Assignee: Honeywell International, Inc.
    Inventors: Hans Peter Friedrichs, Rondo K. Hubbard