Company Filing History:
Years Active: 1977-1982
Title: Innovations by John A. Stewart
Introduction
John A. Stewart is a notable inventor based in Flint, MI (US), recognized for his contributions to automotive technology. He holds a total of 5 patents, showcasing his innovative spirit and technical expertise in the field.
Latest Patents
Among his latest inventions is the low tire pressure transducer, which is designed to enhance vehicle safety by monitoring tire pressure. This device features a diaphragm that responds to tire pressure changes, coupled with a mechanical spring force. A magnet within the transducer interacts with a shunt to minimize the external magnetic field when tire pressure is optimal. However, if the tire pressure drops, the diaphragm's movement alters the shunt's position, increasing the external magnetic field significantly. This mechanism also opens a valve to relieve any air pressure buildup, preventing premature actuation due to air leakage.
Another significant invention is the low tire pressure detector and magnetic signal sending unit. This device utilizes a bellows charged to a reference pressure, which moves a magnet from a shielded position to a signal-emitting position when tire pressure falls below a predetermined threshold. The design includes a latching force established by the magnet, which operates against the bellows force to maintain the magnet in a non-signaling position until necessary.
Career Highlights
John A. Stewart is currently employed at GM Global Technology Operations LLC, where he continues to innovate and develop new technologies that enhance vehicle performance and safety. His work has significantly impacted the automotive industry, particularly in tire pressure monitoring systems.
Collaborations
Throughout his career, Stewart has collaborated with talented individuals such as Wayne C. Nichols and Roy G. Hynes, contributing to the advancement of automotive technologies.
Conclusion
John A. Stewart's innovative contributions to tire pressure monitoring systems exemplify his commitment to improving vehicle safety and performance. His patents reflect a deep understanding of automotive technology and a dedication to innovation.