US Patent 11927048 Stackable shims

A set of stackable, planar shims is provided, with each shim having a series of projections on the top surface and corresponding recesses on the bottom surface, wherein the projections overlay the recesses. Each shim may be characterized by a bisecting line, with the series of projections and recesses being a reverse image of each other, on either side of the bisecting line. Notches in opposite corners of the shims facilitate aligning the shims in an interlocking arrangement, regardless of which surfaces of the shims are pressed into contact. The projections on the surface of the shim can be arranged to create a barrier to shear forces that are perpendicular to the sides of the shim and diagonal to the sides of the shim.