This inventor holds 1 USPTO granted patent. Top assignee: Deere & Company. Active years: 1981.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1981
Title: Eugene S. Zirker: Inventor of Tree-Shearing Technology
Introduction
Eugene S. Zirker is an inventor associated with Dubuque, Iowa, and Deere & Company. His patent describes a hydraulic tree-shear system designed to cut and handle trees in either single-tree or accumulation mode.
Latest Patents
Zirker is credited with 1 patent: “Tree Shear Head and Controls Therefor.” The invention uses a shear, a grapple tong, and an accumulator tong, each positioned by a double-acting hydraulic actuator controlled through solenoid-operated valves. In non-accumulate mode, both tongs operate together to grasp and release trees one at a time. In accumulate mode, the tongs operate in sequence, allowing multiple cut trees to be gathered.
Career Highlights
Zirker’s patent reflects an engineering approach to improving the operation of tree-shearing equipment. Its selectable control modes support both individual tree handling and the accumulation of several cut trees.
Collaborations
Zirker is associated with Deere & Company. Victor C. Pierrot and Andrew Paul Redman are identified as his coworkers.
Conclusion
Eugene S. Zirker’s patented tree-shear head and controls provide flexible hydraulic operation for cutting and handling trees, including the option to accumulate multiple cut trees.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile