Tire valve cap with pressure indicator

Details Tire valve cap with pressure indicator Tire valve cap with pressure indicator

1977-06-20

1978-08-01

Woodiel, Donald O.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

B60C 2304

Patent

active

041035496

ABSTRACT:
A tire valve cap with a built-in pressure indicator consisting of a housing structure with a spring-loaded diaphragm piston exposed to the tire pressure, the axial movements of the hub of the diaphragm piston being converted into angular movements of a pointer shaft and pointer member through a helical cam connection. The position of the fixed pointer is adjustable, and the pointers are radial protrusions whose position can be ascertained visually or by finger touch.

REFERENCES:
patent: 1291901 (1919-01-01), Hurd
patent: 1397728 (1921-11-01), Evans
patent: 3177724 (1965-04-01), Trinca
patent: 3283584 (1966-11-01), Coffing
patent: 3523451 (1970-08-01), Kohn

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