TIRE PRESSURE INDICATOR

摘要

A qualitative indication of the pressure in a pneumatic tire is provided by a sliding marker (27) in a sleeve (11). The marker (27) moves in a chamber formed by a hollow lens (31) closing one end (32) of the sleeve (11) and a diaphragm (25) within the sleeve (11). A spring (36) forces the marker (27) toward the diaphragm (25) and air pressure from the tire is applied to the opposite side of the diaphragm (25) from the marker (27). A pressure above a predetermined amount is indicated by the end (32) of the marker (27) substantially filling the hollow lens (31) and a pressure below the predetermined amount is indicated by the end (32) of the marker (27) withdrawing into the sleeve (11).