Harold A Haven

US Patent:

40042715, Jan 18, 1977

Filed:

Aug 1, 1975

Appl. No.:

5/601319

Inventors:

Harold A. Haven - Hale MI
John A. Stewart - Flint MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60C 2302

US Classification:

340 58

Abstract:

A vehicle pneumatic tire low pressure warning system including a low pressure air switch carried on the vehicle rotating wheel assembly which compares a reference pressure and the tire pressure and couples the tire air to an actuator on the rotating wheel assembly when the difference exceeds a specified amount. The tire air operates the actuator to position a magnet to actuate a reed switch sensor on a stationary member of the vehicle. A signal is provided in response to the reed switch actuation to warn the vehicle operator of the low tire pressure.