John H Varterasian

Title: Innovations by John H. Varterasian

Introduction

John H. Varterasian is a notable inventor based in Livonia, MI (US). He has made significant contributions to the field of automotive technology, particularly in the area of nondestructive testing. With a total of 5 patents to his name, Varterasian's work focuses on improving the reliability and efficiency of automotive components.

Latest Patents

One of his latest patents is a vibration technique for measuring bonding in automotive radiators. This nondestructive testing method measures the percentage of good bonds between air centers and cooling tubes based on natural or resonant frequencies of the exchanger. The exchanger is excited by an audio speaker, and the first natural frequency is measured by an accelerometer. This frequency indicates the percentage of good bonds in the center portion of the exchanger based on its stiffness. Additionally, the audio speaker is moved to an antinode of a higher frequency mode to measure a second natural frequency, which indicates the percentage of bonds at the edges and corners. The resonant frequencies are then compared to standards to determine the actual percentage of good bonds.

Another significant patent involves an acoustical inspection method for inspecting the ceramic coating of a catalytic converter monolith substrate. This method determines whether a ceramic coating was applied in a predetermined amount and uniformly to the surface of exhaust gas passages. The substrate is mounted in an acoustically sealed structure to form a Helmholtz resonator. A speaker produces a continuous sound wave through the coated passages, and the phase angles of the sound waves are compared to those of a reference sound wave. This comparison helps detect whether the passages have the prescribed quantity and uniformity of coating and any blockage.

Career Highlights

Varterasian is currently employed at GM Global Technology Operations, Inc. His work has been instrumental in advancing automotive technologies and ensuring the quality of automotive components. His innovative approaches have garnered attention in the industry.

Collaborations

Throughout his career, Varterasian has collaborated with notable colleagues, including Richard J. Granzotto and Albert R. Plack. These collaborations have contributed to the development of advanced technologies in the automotive sector.

Conclusion

John H. Varterasian's contributions to automotive technology through his innovative patents demonstrate his commitment to enhancing the reliability and efficiency of automotive components. His work continues to impact the industry positively.