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US 3,944,971 AGranted
High/low tire pressure signal device
AssigneesCiro Ramirez, Edward J. Readman, Norman St. Jean, S. T. Chavarria
InventorCiro Ramirez
Life of this patent
Estimating the term…
Abstract
A tire pressure sensing and warning device will indicate automatically when the air pressure in any one of the vehicle tires drops below or exceeds a predetermined level. The device will not interfere with the changing of the tires and rims on any of the vehicle wheels.
Claims3
A tire pressure signal device for a vehicle having a pneumatic tire mounted on a wheel, comprising:
- a housing having a bore formed therein, said wheel having a central portion merging outwardly into a pair of annular rims for engaging the inner periphery of said tire, and said housing mounted on said central portion of said wheel;
- a diaphragm disposed within said bore and closing one end thereof;
- means providing a pneumatic connection between the outer side of said diaphragm and the pressure within said tire so that diaphragm flexes in response to a pressure change in said tire;
- a piston axially slidably disposed in said bore with a top engaged with inner side of said diaphragm and a protuberance on one side of piston wall;
- a spring disposed in the bore of said piston between bottom of said piston and bottom of said bore;
- a rod mounted in center of said bore extending through said piston and insulated therefrom, with nut adjustably mounted on top of said rod for selectively varying space between nut and piston protuberance;
- signal means responsive to the engagement of the piston protuberance against said nut.
4 more elements
Dependencies are inferred from the claim text.