ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,485,328, issued on Dec. 2.
"Adjustable weighted golf club" was invented by John W. Rich Jr. (Gilberton, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A golf club with a dynamic weighting system that utilizes a fluent liquid medium to enhance swing efficiency and ball striking performance. The club includes a hollow shaft and a hollow club head, with internal cavities fluidly coupled to form a continuous chamber. An adjustable check valve assembly within the shaft allows for evacuation of air, creating a vacuum that retains the fluent medium within the sealed chamber. The check valve assembly comprises an expandable sleeve, a valve chamber with a fru...