Excess pressure claibrated guage

A valve assembly, comprising:

• a housing;
• a valve portion disposed in the housing, the valve portion being able to change between an open position and a closed position;
• a variable pneumatic device disposed in the housing, the variable pneumatic device able to change between a first configuration and a second configuration;
• an inner cavity, the housing in fluid communication with the inner cavity;
• and
• an exhaust aperture formed as part of the housing;
• wherein as pressure builds in the variable pneumatic device, the variable pneumatic device changes from the first configuration to the second configuration, such that air is prevented from flowing around an outer surface of the variable pneumatic device, and air flowing through the valve body passes through the exhaust aperture.

A valve assembly for preventing the over inflation of a tire, comprising:

• a housing;
• a valve body disposed in the housing;
• a valve seat formed as part of the valve body;
• a valve member selectively in contact with the valve seat such that the valve member is in contact with the valve seat when the valve member is in a closed position, and the valve member moves away from the valve seat when the valve member is moved to an open position;
• a pneumatic muscle having a variable volume cavity such that the pneumatic muscle is able to change between a first configuration and a second configuration, the pneumatic muscle disposed in the housing in proximity to the valve body;
• an inner cavity, the housing in fluid communication with the inner cavity;
• and
• an exhaust aperture formed as part of the housing;
• wherein air flows through the valve body and around an outer surface of the pneumatic muscle when the valve member is in the open position and the pneumatic muscle is in the first configuration, and as pressure builds in the inner cavity, the pneumatic muscle expands, such that when the pneumatic muscle is in the second configuration, a portion of the pneumatic muscle contacts the valve body and prevents air from flowing around the outer surface of the pneumatic muscle, and air flowing through the valve body passes through the exit aperture.