Abstract: A system and methods of use for assembling packages has one or more conveyors for advancing one or more product flavors into an accumulation of product units. At an accumulation area the accumulated product units are separated into a subset of pack units by a pack splitter which are then deposited onto an indexing conveyor. The pack units may be supported by a substrate. The pack units are advanced along the indexing conveyor for final package assembly.

Abstract: A prosthetic leg having a knee joint assembly that includes a plunger-activated, three-chamber cylinder body, a control valve, a control valve actuator, a pylon shaft and artificial foot. The knee joint assembly rotates in a single axis and provides two-stage hydraulic gait control and shock absorption relative to two spring-biased pistons. A cam linkage and actuator valve having a moveable piston and piston chamber responds to knee flexion and switches fluid flow at the control valve and cylinder between a “soft” spring and a “hard” spring to provide two levels of adjustable control to stabilize the user. Alternative microprocessor directed electronic and hydraulic controllers are also disclosed that can be adapted to a knee assembly to sense myoelectric activity and rotation, strain, and/or linear movement of the prosthesis.