US Patent Issued to ISUZU MOTORS on April 21 for "Fluid working machine" (Japanese Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,172, issued on April 21, was assigned to ISUZU MOTORS Ltd. (Yokohama, Japan).

"Fluid working machine" was invented by Shoichi Takemoto (Fujisawa, Japan), Koji Terashima (Fujisawa, Japan), Yasushi Yamamoto (Fujisawa, Japan) and Yusuke Kitamoto (Fujisawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid working machine includes a cylinder that has a housing portion for accommodating a fluid, a piston that reciprocates in the cylinder, and a crankshaft that performs rotational motion in conjunction with reciprocating motion of the piston. The piston has an opposing concave portion provided in an opposing portion that faces a sliding surfac...