ALEXANDRIA, Va., July 16 -- United States Patent no. 12,667,947, issued on June 30, was assigned to Koki Holdings Co. Ltd. (Tokyo).
"Work machine" was invented by Toshinori Yasutomi (Ibaraki, Japan) and Tatsuhiro Tago (Ibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention improves workability. In a driving machine, a valve mechanism is provided at a top wall of a pressure storage container. The valve mechanism has a valve for replenishing air in a pressure chamber. The valve is inserted from an upper side into a communication passageway formed in the pressure storage container and is attached to a valve attaching portion of the communication passageway. The valve mechanism has a...