Method for varying the ambient pressure in a vessel
AssigneePerry Oceanographics, Inc.
InventorsThomas C. Schmidt, Charles R. Yemington
Life of this patent
Estimating the term…
Abstract
The ambient pressure of the environment of an individual within a vessel is varied between an upper and lower pressure value by providing the vessel with a mass of gas sufficient to fill at least a substantial part of the vessel, and varying the quantity of liquid, primarily water, in the vessel in order to cause the pressure therein to vary correspondingly between the upper and lower values.
Claims21
A method for varying the ambient pressure of the environment of an individual totally enclosed within a vessel between an upper and lower pressure value, comprising:
- providing the vessel with a mass of gas and with a mass of liquid, the mass of liquid being sufficient to fill at least a substantial part of the vessel when the pressure is at the upper value;
- and varying the quantity of liquid in the vessel in order to cause the pressure therein to vary correspondingly between the upper and lower values.
A method for varying the ambient pressure of the environment of an individual totally enclosed within a vessel between an upper and lower pressure value, comprising:
- providing the vessel with a mass of gas sufficient to fill at least a substantial part of the vessel when the pressure is at the lower value;
- providing the vessel with a quantity of liquid;
- varying the quantity of liquid in the vessel in order to cause the pressure therein to vary correspondingly between the upper and lower values;
- and maintaining the quantity of gas present in the vessel constant during at least part of said step of varying.
A method for varying the ambient pressure of the environment of an individual totally enclosed within a vessel between an upper and lower pressure value, comprising:
- providing the vessel with a mass of gas sufficient to fill at least a substantial part of the vessel when the pressure is at the lower value;
- providing the vessel with a quantity of liquid;
- and varying the pressure in the vessel between the upper and lower values by correspondingly varying substantially only the quantity of liquid therein.
Dependencies are inferred from the claim text.