ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,025, issued on Dec. 16, was assigned to NTN Corp. (Osaka, Japan).
"Feed screw mechanism and electric actuator" was invented by Yuta Oku (Shizuoka, Japan), Akio Kato (Shizuoka, Japan) and Kayo Sakai (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A feed screw mechanism includes a rotary member having a female screw portion, a linear motion member having a male screw portion screwed to the female screw portion and making a linear motion with rotation of the rotary member, a lubricant between the female and male screw portions, a housing housing the rotary and linear motion members, and a wall portion protruding, in a radial direction, ...