ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,967, issued on Oct. 21, was assigned to Hitachi Astemo Ltd. (Hitachinaka, Japan).
"Variable displacement oil pump" was invented by Nobuaki Sogawa (Hitachinaka, Japan), Koji Saga (Hitachinaka, Japan) and Daisuke Kato (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 coil spring (SP) as an urging member is arranged at a position that does not overlap a first suction port (114), a first discharge port (115) and an inlet (124a) which correspond to a suction portion when viewed from an axial direction along a drive shaft (2). Therefore, in the variable displa...