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US 5,365,967 AGranted
Safety tire valve
AssigneeCapital Data
InventorJohn C. Moore
Life of this patent
Estimating the term…
Abstract
A tire pressure indicator which includes a valve stem over-pressure indicator and a valve stem cap under-pressure indicator. The valve stem includes an air porting scheme that releases over-inflation air for escape through a whistling reed configuration. The valve stem cap includes a top translucent panel for coaction with a diaphragm spring contained therebelow. Normal tire pressure distends the diaphragm spring to an upward convex attitude in contact with the underside of the translucent panel to project a visual indicator.
Claims11
A pressure indicator device for air-inflated vehicle tires, comprising:
- a valve stem for receiving air under pressure;
- a check actuator for closing the valve stem and preventing reverse flow of said air;
- a valve cap housing having an open axial portion and being sealingly secured on said valve stem;
- a translucent panel secured across the top of said valve cap housing open axial portion;
- a diaphragm spring normally downwardly convex secured across said valve cap housing axial portion, said spring being round and uniformly thick with a colored upper surface having a line etched thereon to provide visual indication when in engagement with said translucent panel;
- and
- air distributor means secured across said open axial portion below said diaphragm spring and including a foot member for urging the check actuator open to permit normal inflation air pressure communication into the valve cap housing open axial portion;
- whereby the normal inflation air pressure distends the diaphragm to an upwardly convex position in contact with the translucent panel to provide visual indication.
5 more elements
Dependencies are inferred from the claim text.