ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,829, issued on May 13, was assigned to Hitachi Astemo Ltd. (Hitachinaka, Japan).
"Variable-capacity oil pump" was invented by Daisuke Kato (Hitachinaka, Japan), Koji Saga (Hitachinaka, Japan) and Nobuaki Sogawa (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a variable displacement oil pump (VP1) according to the present invention, a stopper portion (45) that can come into contact with a cam ring contact portion (112e) provided at a pump accommodating portion (110) is provided at a position that does not overlap a first suction port (114), a second suction port (124) and an inlet (124a), which correspond to a suction portion, i...