ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,754, issued on Feb. 4, was assigned to HITACHI ASTEMO LTD. (Ibaraki, Japan).
"Shock absorber" was invented by Kosuke Kadokura (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pin portion in which an introduction orifice leading to a back-pressure chamber is formed is disposed along inner peripheries of a main body, a main valve, and a pilot casing. A nut disposed on the pin portion is rotated relative to the pin portion to fasten the main body, the main valve, and the pilot casing together. This eliminates the necessity of machining a tool engagement portion in the pin portion and represses an increase in man-hours."
The patent w...