Abstract: An apparatus for locking drawers and the like has a longitudinally guided operating rod for moving a ram mounted in the rear area of the drawer. A sloping surface of the ram projects into a bore of a pivotable lever and pivots it out of a fixed recess, permitting movement of the drawer. The ram is retracted by a spring so that the lever is urged by a torsion spring engages the recess to lock the drawer in the closed position on some other position where a recess is provided. The rod extends through the drawer front.

Abstract: A display case with a locking mechanism for securing display case components together comprising a first member including hook means, a second frame member including hook means adapted to interlock with the first member's hook means, and means for biasing the second member's hook means into engagement with the first member's hook means, so the first member's and the second member's hook means interlock.

Abstract: An under-reaming pile bore excavator by which a straight pile bore is first excavated vertically to a given depth by rotating the main drill bits and the under-reamed bore is next excavated downward and outward into a given shape by rotating the slidable wing bits, allowing a relatively larger diameter ratio of the under-reamed pile bore to the straight pile bore. The under reamed pile bore excavator of the present invention comprises a plurality of guide rails disposed so as to cross the axis of the drill pipe, and a plurality of slidable wing bits mounted on the guide rails which excavate the under-reamed bore, in addition to the conventional main drill bits which can excavate the straight pile bore.