ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,772, issued on Nov. 18, was assigned to Amazon Technologies Inc. (Seattle).
"Self-positioning swivel caster mechanisms" was invented by Dragan Pajevic (Arlington, Mass.) and Tim Martin (Andover, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A self-positioning swivel caster may include a swivel mechanism that defines a home position of the caster. The swivel mechanism may include a compression spring, an upper cam, and a lower cam that is coupled to the caster wheel, in which the upper and lower cams include mating surfaces that define the home position. A bias force applied by the compression spring to the upper cam may cause rotation of the ...