This inventor holds 1 USPTO granted patent and 1 EPO patent. Top assignees: Parker Hannfin Emea S.à.r.l., Parker-Hannifin Corporation. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 1 
1 out of 1,696 
Years Active: 2026
Title: Dennis Allen: Inventor of a Redundant Hydraulic System
Introduction
Dennis Allen is an inventor associated with Eagle River, Wisconsin, United States. His patent work includes a redundant hydraulic system designed to support hydraulic actuator control.
Latest Patents
Allen is credited with 1 patent, titled “Redundant Hydraulic System.” The invention describes a hydraulic fluid pressure source and reservoir, an actuator with two chambers, and a valve assembly containing two pilot-operated directional control valves. The system also includes four fail-safe solenoid-controlled pilot valves and a pilot pressure fluid supply system. Together, these components provide a redundant arrangement for directing hydraulic fluid to and from the actuator.
Career Highlights
Allen’s listed company affiliations include Parker-Hannifin Corporation and Parker Hannifin EMEA S.à r.l. His patent reflects work on hydraulic systems and fail-safe control components.
Collaborations
Allen’s listed coworkers include Johan Hansson and Tommy Claeson.
Conclusion
Dennis Allen’s patent documents an approach to hydraulic actuator control that combines directional valves, pilot controls, and redundant system components.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile