Patent ID: 6543294
Filing Date: 2003-04-08
Classification: F16F,G01L

Abstract:
A fluid vessel comprising:a vessel body having an inner surface and an outer surface; an inner volume defined by the inner surface of the vessel body containing a fluid having a fluid pressure; a pressure indicator, disposed completely within the inner volume, having a sealed housing, an internal indicator pressure within the sealed housing, and at least one flexible diaphragm, the diaphragm having an interior surface exposed to the indicator pressure and an exterior surface exposed to the fluid pressure, such that the indicator pressure and instant fluid pressure effect movement of the flexible diaphragm in a visibly-discernable manner according to the instant fluid pressure; and a transparent viewing window, disposed in the vessel body having an inner surface exposed to the fluid pressure, and positioned along a line of sight from the exterior of the fluid vessel to the pressure indicator.