TIRE PRESSURE WARNING APPARATUS

• US 3,787,806 A
• Filed: 06/26/1972
• Issued: 01/22/1974
• Est. Priority Date: 06/26/1972
• Status: Expired due to Term

• Current Assignee: Donald E. Church
• Original Assignee: Donald E. Church
• Inventors: Church, Donald E.
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Nowicki, Joseph E.
• Application Number:
  US05/266,113
• Time in Patent Office: 575 Days
• Field of Search: 340/58,60,237,239 200/61.22,61.23,61.25,61.26 116/34R,70 73/146.2,146.3,146.5
• US Class Current: 340/447
• CPC Class Codes: B60C 23/0493 for attachment on the tyre

Abstract

A tire pressure warning apparatus for operation in a pneumatic tire in combination with an inner tube is disclosed. The warning apparatus comprises a pressure sensor, transmitter and a source of power sealingly adhered to an inner tube. The sensor assembly being in communication with the tire pressure for actuation of the transmitter in response to a drop in the tire pressure. Means are provided to protect the individual components while permitting the necessary flexibility to conform to the shape and motion of the inner surface of the tire.

Claims

1. A vehicle tire pressure monitoring and warning apparatus adhered to an inner tube of a pneumatic tire for the pressure controlled generation of an RF signal comprising:

a pressure sensor exposed to the pneumatic pressure within the inner tube;

a power supply;

a transmitter including a transmitting antenna;

said pressure sensor, power supply and transmitter configurated as separate units;

flexible leads connecting said separate units; and

a flexible material surrounding each of said separate units, said units configurated to generate a single composite unit and to permit relative flexing of each of said separate units relative to one another, said flexible material being adhered to said inner tube and to conform in shape to the inner surface of the tire.

2. The warning apparatus as set forth in claim 1 in which each of said sensor, power supply and transmitter is mounted in a hard container, each container being held by said flexible material.

3. The warning apparatus aS set forth in claim 2 in which said flexible material is secured to the exterior of the inner tube, the inner tube having an aperture therethrough opposite said sensor to provide communication between said sensor and the interior of the inner tube.

4. The warning apparatus as set forth in claim 2 in which the warning apparatus is secured to the interior of the inner tube, said inner tube having an aperture therethrough opposite said power supply to provide access to said power supply;

and a removable insert mounted in the inner tube aperture.