Moving vehicle tyre pressure monitor - has transducers warning driver of deflation or pressure imbalance by remote sensing

摘要

A sealed chamber (1) fixed to the wheel contains a diaphragm (4) responsive to the tyre pressure link (6) and backed by a piston (3) moved inside the chamber to shift a screen (9) which progressively unmasks a magnet (10) mounted in the chamber opposite the level of the remote static sensor (B). In a second design, a spring-loaded tubular piston simultaneously backpressures the diaphragm with oil and unmasks a cylindrical magnet (17) in the event of a pressure drop, by releasing a bridge between the poles.