US Patent 11073387 Level and method of manufacturing same

A level comprising a level body and a bubble vial mounted on the level body is provided. A top opening in the level body interrupts at least a portion of a top wall of the level body to accommodate the bubble vial. An internal support structure is disposed within the tubular configuration of the level body and spanning longitudinally along the level body so as to be disposed on both sides of the top opening to provide structural support to the level body in the vicinity of the top opening. The internal support structure includes a base portion, a pair of legs extending upwardly from the base portion, and an opening disposed between the pair of upwardly extending legs. A carrier structure is disposed in the opening of the internal support structure and positioned beneath the bubble vial and between the internal support structure and the bubble vial.