US Patent 9322186 Leveling spacer system for panel members

A leveling spacer system includes a multiple plates, multiple spacers and multiple knobs. The spacers are threadedly connected to the knobs to clamp the panel members, and the plates are used to connect the spacers and the knobs together with so as to clamp more panel members. The plates and the knobs are located on the top of the panel members, and the spacers are located at the underside of the panel members. When the panel members are leveled, the knobs are removed, and the necks on the spacers are broken to finish the leveling of the panel members.