ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,125, issued on April 14, was assigned to MIKASA SANGYO Co. LTD. (Tokyo).
"Block compactor" was invented by Kenichi Nagasawa (Saitama, Japan), Masaya Sekiguchi (Saitama, Japan), Yuichi Nakagomi (Saitama, Japan) and Yuta Sakai (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A block compactor equipped with a brake mechanism capable of securely locking rollers with a simple structure and stably maintaining a locked state and an unlocked state even when exposed to vibration. A brake pad is fixed to a lower end portion of a brake shaft and is configured to be rotatable together with the brake shaft between two rollers adjacent in the front...