Company Filing History:
1 out of 10 
1 out of 1,176 
1 out of 832,761 Years Active: 1982-1991
Title: The Innovations of Paul J Middelhoven
Introduction
Paul J Middelhoven is a notable inventor based in Portland, Oregon. He has made significant contributions to the field of hydraulic braking systems, holding a total of three patents. His work reflects a commitment to enhancing vehicle safety and performance through innovative engineering solutions.
Latest Patents
One of his latest patents is the Fail-safe wheel service brake system. This hydraulic wheel braking system for vehicles features wet disc wheel brakes that are activated by a single spring-activated piston within each brake housing. Each piston can be selectively and variably disengaged from the brake discs by variable hydraulic pressure acting against the piston, which works in opposition to spring pressure to enable controlled wheel rotation. During vehicle operation, the brake fluid pressure at the pistons is managed by a foot pedal-operated brake valve. Additionally, a manually-operated parking and control valve assembly can selectively disable the brake valve and relieve hydraulic pressure at the pistons, allowing the pistons to spring-apply to the discs. This assembly also acts to automatically spring-apply the pistons to the discs upon a loss of brake or transmission clutch fluid pressure.
Career Highlights
Throughout his career, Paul has worked with several prominent companies, including Atlas Copco Construction and Mining Technique AB and PACCAR Inc. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Paul has collaborated with notable coworkers such as Mark J Albertson and Eric Johnson. Their teamwork has likely played a role in the successful development of his patented technologies.
Conclusion
Paul J Middelhoven's contributions to hydraulic braking systems demonstrate his innovative spirit and dedication to vehicle safety. His patents reflect a deep understanding of engineering principles and a commitment to improving automotive technology.