Abstract: An apparatus for synchronizing the extension and retraction of linear actuators. A quadrilateral structure is formed by means of the support base, a pair of actuators, and a crossmember, with a sensor positioned so as to detect variations in the shape of the quadrilateral. The sensor functions in cooperation with the actuator control mechanism to vary power to the actuators in response to the changes in shape which occur due to slight variations in actuator speed of movement.

Abstract: A portable log splitter having a frame supported adjacent to its rear and front ends by cranked axle structure and a stand interconnected with the axle for raising and lowering of the rear and front ends in unison and in a substantially level mode so as to enable the splitter device to more readily handle ground-supported logs. The splitter is rockable about a fore-and-aft axis through a range including an upright position and a generally horizontal position so as to achieve splitting in planes within that range. Raising and lowering of the frame increases the ability of the splitter to make horizontal splits at relatively low levels. The stand is disconnectible from the axle means for retraction clear of the ground to condition the frame for towing behind a towing vehicle.