Patents Assigned to Sustena, Inc.
  • Constant pressure load bearing air chamber
    Patent number: 5142717
    Abstract: An air chamber including a control for manually selecting a desired pressure within the chamber. Means for sensing the air pressure within the chamber are provided as are pump means for adding air to the chamber and vent means for removing air from the chamber. Control circuitry adds or removes air from the chamber responsive to the sensed pressure to maintain the pressure within the chamber at the preset level. Structural means are provided within the chamber for supporting a portion of a load placed thereon and thus decreases air pressure within the chamber to avoid deflation.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: September 1, 1992
    Assignee: Sustena, Inc.
    Inventors: Lloyd D. Everard, Wilbur S. Wridge, Jr.
  • Constant pressure load bearing air chamber
    Patent number: 4995124
    Abstract: The air chamber includes a control for manually selecting a desired pressure within the chamber. Means for sensing the air pressure within the chamber are provided as are pump means for adding air to the chamber and vent means for removing air from the chamber. Control circuitry adds or removes air from the chamber responsive to the sensed pressure to maintain the pressure within the chamber at the preset level. Structural means are provided within the chamber for supporting a portion of a load placed thereon and thus decreases air pressure within the chamber to avoid deflation.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: February 26, 1991
    Assignee: Sustena, Inc.
    Inventors: Wilbur S. Wridge, Jr., Lloyd D. Everard