Tire inflation indicator
First Claim
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1. Apparatus for indicating the air pressure in a tubeless automobile tire, or the like, having a sidewall mounted on the wheel rim of a vehicle, comprising:
- (a) a visible indicator mounted on the sidewall of said tire externally of the tire; and
(b) means for sensing the pressure within said tire mounted on the sidewall of said tire within said tire having an output to actuate said indicator at a predetermined pneumatic pressure.
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Abstract
A tire inflation indicator is integrated into the sidewall of a tire to give a visual indication of proper pressurization. A small lamp is imbedded in the sidewall and is electrically connected through the sidewall to a pneumo-mechanical switch and battery. The switch connects the battery to the lamp when the tire pressure falls below a predetermined level.
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Citations
12 Claims
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1. Apparatus for indicating the air pressure in a tubeless automobile tire, or the like, having a sidewall mounted on the wheel rim of a vehicle, comprising:
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(a) a visible indicator mounted on the sidewall of said tire externally of the tire; and (b) means for sensing the pressure within said tire mounted on the sidewall of said tire within said tire having an output to actuate said indicator at a predetermined pneumatic pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for monitoring inflation pressure in a motor vehicle tire comprising:
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(a) means for continuously measuring said inflation pressure mounted directly to said tire on an interior surface thereof, said means for measuring being calibrated to close an electrical circuit when the inflation pressure drops below a pre-determined value; and (b) indicator means embedded in an exterior surface of said tire, said indicator means being activated upon closure of said circuit. - View Dependent Claims (11, 12)
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Specification