Hans bell housing for inflating and deflating a balloon envelope

1. An apparatus, comprising:

a fixed housing that is securable to a balloon envelope;

an impeller housing comprising an impeller, wherein the impeller housing is at least partially disposed within the fixed housing, wherein the impeller housing comprises a plurality of vents, wherein an airflow passageway is defined from inside the impeller housing through the plurality of vents, and wherein the impeller housing is moveable between a closed position and an open position;

one or more actuators configured to move the impeller housing between the closed position and the open position; and

an energy conversion device configured to convert mechanical energy generated by the impeller into electrical energy,

wherein the impeller housing and the fixed housing are arranged such that, when the impeller housing is in the closed position, the impeller housing seals an interior volume of a chamber within the balloon envelope that is securable to the fixed housing; and

wherein the impeller housing and the fixed housing are further arranged such that when the impeller housing is in the open position the impeller housing extends into and opens the airflow passageway to the interior volume of the chamber within the balloon envelope that is securable to the fixed housing.

2. The apparatus of claim 1 , wherein the fixed housing comprises an open-ended, hollow cylinder defining a plurality of vents in a cylindrical sidewall, wherein the fixed housing has an open first end that has a periphery and a closed second end that defines an aperture.

3. The apparatus of claim 2 , further comprising a gasket attached to an inner wall of the fixed housing between the first end of the fixed housing and the plurality of vents of the fixed housing.

4. The apparatus of claim 1 , wherein the impeller housing comprises a hollow cylindrical body with a first end and a second end and a plate having a periphery that is coupled to the first end of the impeller housing.

5. The apparatus of claim 4 , wherein a flange extends radially outward from the impeller housing, and wherein the plurality of vents are defined in the impeller housing between the plate and the flange.

6. The apparatus of claim 5 , wherein the one or more actuators are in mechanical communication with the flange of the impeller housing.

7. The apparatus of claim 4 , wherein the periphery of the plate mates with a periphery of the first end of the fixed housing to form a seal in the closed position, and wherein the plate and at least a portion of the plurality of vents of the impeller housing extend into the balloon envelope in the open position providing fluid communication between atmosphere and an internal chamber of the balloon envelope via the airflow passageway.

8. The apparatus of claim 4 , wherein a surface of the plate is convex.

9. The apparatus of claim 1 , wherein the fixed housing defines a flange extending radially outward, wherein the balloon envelope is securable to the flange of the fixed housing with the flange disposed between a plurality of vents in the fixed housing and the balloon envelope.

10. The apparatus of claim 1 , wherein the balloon envelope defines a sealed lift gas compartment and the chamber within the balloon envelope defines a bladder capable of fluid communication with the atmosphere via the airflow passageway.

11. The apparatus of claim 1 , further comprising a plurality of shoulder bolts each with a threaded end and a shoulder end, wherein the plurality of shoulder bolts extend through a plurality of bores defined in the closed second end of the fixed housing such that the threaded ends are secured to the flange of the impeller housing.

12. The apparatus of claim 1 , wherein the second end of the impeller housing defines a receptacle supported by a plurality of struts extending from the receptacle to an inner surface of the impeller housing.

13. An apparatus, comprising:

a fixed housing that is configured to be coupled to a balloon envelope;

an impeller housing disposed within the fixed housing, wherein the impeller housing and the fixed housing form a seal in a closed position, wherein the impeller housing is moveable into the balloon envelope relative to the fixed housing in an open position, and wherein the impeller housing defines an unobstructed airflow passageway between an internal chamber in a balloon envelope and the atmosphere in the open position; and

an energy conversion device configured to convert mechanical energy generated by the impeller into electrical energy.

14. An apparatus, comprising:

an impeller housing comprising a hollow cylindrical body with a first end and a second end;

a plate having a periphery that is coupled to the first end of the impeller housing, wherein a flange extends radially outward from the impeller housing;

a plurality of vents defined in the impeller housing between the plate and the flange, wherein an airflow passageway is defined from the second end of the impeller housing through the hollow cylindrical body of the impeller housing to the plurality of vents;

an impeller disposed within the impeller housing between the first end and the second end of the impeller housing; and

an energy conversion device configured to convert mechanical energy generated by the impeller into electrical energy.

15. A method, comprising:

operating a control system for a balloon comprised of a fixed housing that is configured to be coupled to a balloon envelope and an impeller housing disposed within the fixed housing, wherein the impeller housing and the fixed housing form a seal in a closed position, wherein the impeller housing is moveable into the balloon envelope relative to the fixed housing in an open position, and wherein the impeller housing defines an unobstructed airflow passageway between an internal chamber in a balloon envelope and the atmosphere in the open position;

receiving a signal to increase or decrease an amount of air within the balloon envelope;

spinning the impeller;

causing one or more actuators to move the impeller housing from the closed position to the open position;

moving air between the balloon envelope and the atmosphere; and converting, with an energy conversion device, mechanical energy generated by the impeller into electrical energy.

16. The method of claim 15 , further comprising:

moving air into the balloon envelope;

receiving a signal that the balloon envelope contains the desired amount of air; and

causing the one or more actuators to move the impeller housing from the open position to the closed position.

17. The method of claim 15 , further comprising:

stopping the impeller;

moving air out of the balloon envelope; and

spinning the impeller in a reverse direction via air exiting the balloon envelope.

18. The method of claim 15 , further comprising:

determining a target speed for the impeller based on pressure, mass or density of air in a balloon envelope;

in response to determining a target speed, spinning the impeller while the impeller housing is in the closed position;

the impeller reaching the target speed; and

in response to the impeller reaching the target speed, moving the impeller housing into the open position.