Binary fluid control valve system
Fluid control valves including single-opening, binary fluid control valves that are initially closed and can be opened one time only to allow a fluid transfer between two spaces separated by a fluid impermeable barrier. Applications of valves of this type include inflatable devices, including but not limited to medical device balloons, in particular gastric balloons for weight loss.
1. A device for occupying space within a patient's body, the device comprising:
an expandable balloon having a balloon wall surrounding a reservoir, where upon expansion of the expandable balloon, the reservoir defines a first space, wherein the balloon wall separates the first space from a second space in the patient's body; and
a binary fluid control valve comprising:
a base defining a fluid path therethrough such that the fluid path is fluidly coupled between the first space and the second space;
a traveler structure coupled to the base;
an energy storage device; and
a restraining element that restrains the energy storage device in a stored energy condition when the traveler structure is in a closed configuration, wherein a force of the restraining element counteracts a force of the energy storage device, wherein the restraining element is configured to degrade such that degradation of the restraining element releases the energy storage device from the stored energy condition to cause the traveler structure to move relative to the base between the closed configuration and an open configuration during a transition period, wherein in the closed configuration the traveler structure prevents fluid flow through the fluid path between the first space and the second space, and wherein in the open configuration the traveler structure permits fluid flow through the fluid path between the first space and the second space.
2. The device of claim 1 , wherein the restraining element is in the first space.
3. The device of claim 2 , wherein the restraining element is configured to degrade in response to introduction of a degrading fluid into the reservoir.
4. The device of claim 3 , wherein the degrading fluid is configured to degrade the restraining element over a designed period of time.
5. The device of claim 1 , wherein the restraining element is configured to break when the force of the energy storage device exceeds a strength of the restraining element.
6. The device of claim 1 , wherein in the transition period, the binary fluid control valve moves rapidly from the closed configuration to the open configuration upon breaking of the restraining element.
7. The device of claim 1 , wherein in the transition period, the binary fluid control valve moves from the closed configuration to the open configuration upon deformation of the restraining element.
8. The device of claim 1 , wherein in the transition period, the binary fluid control valve moves continuously between the closed configuration and the open configuration.
9. The device of claim 1 , wherein the restraining element is configured to degrade by a reduction in a mechanical integrity over a pre-determined period.
10. The device of claim 9 , wherein the restraining element is configured to soften over time until the restraining element releases the energy storage device from the stored energy condition.
11. The device of claim 9 , wherein the restraining element is configured to melt over time until the restraining element releases the energy storage device from the stored energy condition.
12. The device of claim 1 , wherein the restraining element is configured to hold the binary fluid control valve in the closed configuration via compression of the energy storage element.
13. The device of claim 12 , wherein the energy storage element is a spring.
14. A binary fluid control valve, the binary fluid control valve comprising:
a base;
a traveler structure coupled to the base;
an energy storage device;
a restraining element that restrains the energy storage device, wherein a force of the restraining element counteracts a force of the energy storage device, wherein the restraining element is configured to degrade over a pre-determined period of time during intentional exposure to specified environmental conditions such that degradation of the restraining element releases energy from the energy storage device to cause the traveler structure to move relative to the base from a closed configuration to an open configuration during a transition period; and
wherein in the closed configuration the traveler structure prevents fluid flow through a fluid path between a first space and a second space, and wherein in the open configuration the traveler structure permits fluid flow through the fluid path between the first space and the second space.
15. The binary fluid control valve of claim 14 , wherein the restraining element is in the first space.
16. The binary fluid control valve of claim 15 , wherein the restraining element is configured to degrade in response to introduction of a degrading fluid into the first space.
17. The binary fluid control valve of claim 16 , wherein the degrading fluid is configured to degrade the restraining element over a designed period of time.
18. The binary fluid control valve of claim 14 , wherein the restraining element is configured to break when the force of the energy storage device exceeds a strength of the restraining element.
19. The binary fluid control valve of claim 14 , wherein in the transition period, the binary fluid control valve moves rapidly from the closed configuration to the open configuration upon breaking of the restraining element.
20. The binary fluid control valve of claim 14 , wherein in the transition period, the binary fluid control valve moves from the closed configuration to the open configuration upon deformation of the restraining element.
21. The binary fluid control valve of claim 14 , wherein in the transition period, the binary fluid control valve moves continuously between the closed configuration and the open configuration.
22. The binary fluid control valve of claim 14 , wherein the restraining element is configured to degrade by a reduction in a mechanical integrity over a pre-determined period.
23. The binary fluid control valve of claim 22 , wherein the restraining element is configured to soften over time until the restraining element releases the energy storage device.
24. The binary fluid control valve of claim 22 , wherein the restraining element is configured to melt over time until the restraining element releases the energy storage device.
25. The binary fluid control valve of claim 14 , wherein the restraining element is configured to hold the binary fluid control valve in the closed configuration via compression of the energy storage element.
26. The binary fluid control valve of claim 25 , wherein the energy storage element is a spring.