US Patent Issued to YAMAMOTO FOUNDATION WORKS on Jan. 13 for "Mainframe rotation mechanism and rotation method for excavation apparatus" (Japanese Inventor)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,009, issued on Jan. 13, was assigned to YAMAMOTO FOUNDATION WORKS Co. LTD. (Yamanashi, Japan).

"Mainframe rotation mechanism and rotation method for excavation apparatus" was invented by Takekazu Yamamoto (Yamanashi-ken, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mainframe rotation mechanism is of an excavation apparatus. The excavation apparatus includes a tubing unit, a base frame, and a mainframe. The base frame is disposed with the tubing unit as a center. The mainframe includes a horizontal frame and a plurality of columns. The horizontal frame includes a slide base for horizontally moving a hammer grab above the tubing unit. The pl...