Sealed pressure indicator

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 sealed pressure indicator, disposed completely within the inner volume and having an internal indicator pressure and a bellows having:
• a closed end,
• an interior surface exposed to the internal indicator pressure, and
• an exterior surface exposed to the fluid pressure;
• such that the length of the bellows will increase as a pressure external to the pressure indicator decreases;
• and
• a visual indicator directly connected to the bellows and having surface indicia to assist in identification of the instant fluid pressure based on the degree of extension of the sealed bellows;
• 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 visual indicator.

A vibration isolator for connecting a first body and a second body, comprising:

• a housing having an inner surface defining a fluid volume;
• a tuning fluid disposed in the fluid volume;
• a piston disposed in the fluid volume and having a surface disposed to substantially segregate a portion of the fluid volume, the segregated portion defining a first chamber within the fluid volume;
• a second chamber having a variable volume;
• a passage connecting the first chamber to the second chamber and permitting fluid flow from the first chamber to the second chamber;
• a volume compensator in fluid communication with the fluid volume in such a manner as to maintain a substantially constant static pressure within the first and second chambers;
• and a pressure indicator, disposed within the volume compensator, comprising a sealed housing having an internal pressure and at least one flexible diaphragm, the diaphragm having an interior surface exposed to the internal pressure and an exterior surface exposed to a pressure external to the pressure indicator such that the internal pressure and the external pressure effect movement of the flexible diaphragm in a visibly-discernable manner according to the instant fluid pressure;
• a transparent viewing window,
• disposed in the sealed housing of the volume compensator,
• having
• an inner surface
• exposed to the static pressure
• within the volume compensator, and
• positioned
• along a line of sight
• from the exterior of the volume compensator
• to the pressure indicator.