Tire pressure indicator

Details Tire pressure indicator Tire pressure indicator

G - Physics

01

L

73/131

G01L 17/00 (2006.01)

Patent

CA 2008430

ABSTRACT OF THE DISCLOSURE A tire pressure indicator includes a hollow cylindrical casing mounted to an inflating valve of a tire, a transparent cap member, a piston member and biasing means for the piston member. The piston member is movably confined inside the hollow cylindrical casing and moves in response to the pressure in the tire. The piston member has a vertical pole which is divided into several parts, each part having a color representing a tire pressure state. The tire pressure is indicated by the color(s) that can be seen through the cap member. A hole is provided along the wall of the hollow cylindrical casing and serves as outlet means for excess air in the tire. The hole is blocked by the piston member when air pressure in the tire is deemed acceptable.

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