Company Filing History:
Years Active: 1976-1984
Title: Innovations of John W. Holdeman
Introduction
John W. Holdeman is a notable inventor based in Muncie, IN (US), recognized for his contributions to the field of mechanical engineering. He holds a total of seven patents, showcasing his innovative spirit and technical expertise. His work primarily focuses on advancements in gear assembly technology, which are crucial for vehicle drive mechanisms.
Latest Patents
One of Holdeman's latest patents is the Helical Planetary Gear Assembly. This assembly is specifically designed for use in vehicle drive mechanisms, such as four-wheel drive transfer cases. The design features a reaction member, or ring gear, that is rigidly secured to the housing. The input member, known as the sun gear, is axially and radially located by a bearing, while the output member, the planet carrier, is axially restrained but radially free to float. In direct drive, the input and output are connected directly, allowing the gears to remain unloaded, which helps avoid the vibration and wear commonly experienced in reduction drive. The assembly is efficient, requiring only one mesh point when shifting between direct and reduction drive modes.
Another significant patent is the Planetary Gear Assembly, which can be manually shifted between a neutral position and high and low range positions. This feature establishes direct drive and reduction ratio drive modes. The assembly operates as an integral unit and also requires only one mesh point when shifting to either high or low range positions. In the direct drive mode, the ring and planet gears are unloaded, which minimizes vibration and wear.
Career Highlights
Holdeman's career is marked by his innovative contributions to BorgWarner Inc., a leading company in the automotive industry. His work has significantly impacted the design and functionality of vehicle drive systems, enhancing performance and reliability.
Collaborations
Throughout his career, Holdeman has collaborated with talented individuals such as Richard T. Brown and Robert W. Halberg. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies in the automotive sector.
Conclusion
John W. Holdeman's contributions to gear assembly technology have made a lasting impact on the automotive industry. His innovative patents reflect his dedication to improving vehicle performance and reliability. His work continues to inspire future advancements in mechanical engineering.