Patent ID: 7470121

Claim:
A mold assembly for manufacturing concrete blocks and adapted for use in a concrete block machine, the mold assembly comprising: a plurality of liner plates forming at least a first mold cavity, wherein at least a first liner plate is moveable; and a drive assembly comprising: a first drive element having a first end and coupled to the first moveable liner plate proximate to a second end; and an actuator assembly including a second drive element selectively coupled to the first drive element proximate to the first end, wherein the actuator assembly is configured to drive the second drive element along a first axis so as to cause at least the second end of the first drive element to move along a second axis and cause the first moveable liner plate to move toward and away from an interior of the first mold cavity, wherein the second drive element includes a rail element, and wherein the first drive element is slideably coupled to the rail element.