This inventor holds 1 USPTO granted patent. Top assignee: Kubota Corporation. 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: Koetsu Fukui: Inventor of a Grout-Injecting Rock Bolt
Introduction
Koetsu Fukui is an inventor associated with Nara, Japan, and Kubota Corporation. His recorded patent work addresses a practical method for reinforcing ground around tunnels.
Latest Patents
Fukui is credited with 1 patent, titled “Rock bolt.” The invention describes a bolt inserted into a bore in the ground from a tunnel’s inner surface and anchored with grout. Two axial grooves in the bolt hold separate tubes: one allows grout to enter the bore, while the other provides a path for displaced air to escape. An elastic tubular member fitted near one end of the bolt can be pressed into the bore to secure the bolt before grout injection, helping make installation easier and more reliable.
Career Highlights
Fukui’s listed patent is associated with Kubota Corporation. Its design combines a pre-injection anchoring feature with a two-tube arrangement for grout delivery and air displacement.
Collaborations
Fukui’s named coworkers include Yoshito Seto and Toshinari Amakasu.
Conclusion
Koetsu Fukui’s “Rock bolt” patent presents a ground-reinforcement approach designed to simplify bolt placement and support reliable grout injection in tunnel construction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile