Patent attributes
A balloon envelope with a plate secured thereto having an outlet port that provides a passageway from an inside of a balloon envelope to the atmosphere, a bracket extending from the plate, a first linear actuator having a first end attached to the bracket, where a passive valve having a periphery is positioned over the outlet port, where the second end of the linear actuator is attached to the passive valve which is movable from a first, closed position where a seal is provided by the engagement of the periphery of the passive valve and a periphery of the outlet port to a second, open position where the periphery of the passive valve is disengaged from the periphery of the outlet port by movement of the second end of the linear actuator to open the passageway between the inside of the balloon envelope and the atmosphere.
