ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,892, issued on May 12.
"Safety jack" was invented by David W. Stecker Sr. (Schaumburg, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The safety jack includes a base and a piston jack mounted on the base. The piston jack includes a base tube mounted on the base. A threaded rod within the base tube has a portion extending above the base tube, where the threaded rod is free to move up and down within the base tube. A nut on the portion of the threaded rod extends above base tube, and a jack saddle is connected to a top of the piston and a top of the threaded base. The nut can be screwed down onto a top of the base tube so as to prevent the jack sa...