Low tire pressure indicator assembly

• US 20020073911A1
• Filed: 10/16/2001
• Published: 06/20/2002
• Est. Priority Date: 10/17/2000
• Status: Abandoned Application

• Current Assignee: Gary Lapohn
• Original Assignee: Gary Lapohn
• Inventors: Lapohn, Gary
• Application Number:
  US09/978,713
• Publication Number:
  US 20020073911A1
• Time in Patent Office: Days
• US Class Current: 116/34R
• CPC Class Codes: B60C 23/0496 Valve stem attachments positioned outside of the tyre chamber

Abstract

The present invention is drawn to a low tire pressure warning system comprising a tubular assembly threaded on to a tire valve stem and having an internal piston movable therein in response to a differential in tire pressure and present spring forces on opposite sides of the piston to trigger a warning signal such as a red colored strip visible along the housing.

Claims

1. A low tire pressure warning device adapted to fit on a tire valve comprising:

a housing adapted to sealably fit on the tire valve and having a sealed chamber therein open to the pressure in the tire;

said sealed chamber having a movable piston therein connected to an external surface of said sealed chamber;

means connected to said piston for adjusting the force thereon to balance the tire pressure in said sealed chamber; and

warning signal means connected to said piston for displaying a warning signal whenever the piston moves in response to a loss of tire pressure below said adjusted balanced force on said piston.

2. A low tire pressure warning device as set forth in claim 1 wherein said force adjusting means is a spring.

3. A low tire pressure warning device as set forth in claim 2 wherein said warning signal means comprises a red circumferential area displayed outside said housing whenever said tire pressure fals below said balance force on said piston.

4. A low tire pressure warning device as set forth in claim 2 wherein said warning signal means comprises a partial circumferential band displayed by said housing whenever said tire pressure fals below said balance force on said piston.

5. A low tire pressure warning device as set forth in claim 4 wherein said housing has a transparent section and wherein said partial circumferential band is displayed in said transparent section of said housing whenever said tire pressure fals below said balance force on said piston.

6. A low tire pressure warning device as set forth in claim 2 wherein said warning signal means comprises a warning flag moving out from said housing whenever said tire pressure fals below said balance force on said piston.

7. A low tire pressure warning assembly for cars trucks and van tires comprising:

a tire;

a hubcap having a central gauge for indicating pressure;

a tire valve connected to said central gauge for displaying the pressure in said tire;

a rotatable indicator area connected to said gauge having an indicator area for proper inflation and underinflation for cars, trucks and vans.

8. A low pressure warning assembly as set forth in claim 7 wherein each indicator area has a normal color area and a warning color area indicating underinflation.

9. A low pressure warning assembly as set forth in claim 8 wherein said warning color area indicating underinflation is red.

10. A low pressure warning assembly as set forth in claim 8 wherein said warning color area indicating underinflation is orange.