Tire pressure indicator

Details Tire pressure indicator Tire pressure indicator

1990-01-19

1991-05-14

Cuchlinski, Jr., William A.

Signals and indicators

Vehicle

Tire inflation or deflation

731468, 116272, B60C 2304, G01L 1912

Patent

active

050146432

ABSTRACT:
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 a biasing spring 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 an outlet for excess air in the tire. The hole is blocked by the piston member when air pressure in the tire is deemed acceptable.

REFERENCES:
patent: 1807752 (1931-06-01), Poster
patent: 3536026 (1970-10-01), Miller
patent: 3670688 (1972-06-01), Seaberg

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