ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,614, issued on Aug. 19, was assigned to TAKE CITE Co. LTD. (Shizuoka, Japan).
"Method of pressure-pumping ready-mixed concrete" was invented by Masanari Takeda (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of pressure-pumping a ready-mixed concrete includes pouring a preceding material for pumping into a piping, then, pouring the ready-mixed concrete into the piping, and pressure-pumping the preceding material and the ready-mixed concrete, so that a lubricant layer formed of the preceding material is formed on an inner surface of the piping to thereby pressure-pump the ready-mixed concrete inside the lubricant layer made o...