Abstract: A manipulator arm for moving a load from a first position at a first elevation, to a second position at a second elevation, provides a base and defines plural spaced apart axle holes. A fulcrum lever link formed of a channel beam defines plural spaced apart axle holes. A first load member, and two support members extend between, and pivotally interconnect, the base plate and the fulcrum lever link and define a quadrilateral lift frame about the pivotal interconnections. An actuator operatively communicates between the first load member and the fulcrum lever link and the fulcrum lever link provides mechanical advantage to the actuator to cause the quadrilateral lift frame to change from a first configuration at the first position to a second configuration at the second position.

Abstract: A manipulator arm for moving a load from a first position at a first elevation, to a second position at a second elevation, provides a base and defines plural spaced apart axle holes. A fulcrum lever link formed of a channel beam defines plural spaced apart axle holes. A first load member, and two support members extend between, and pivotally interconnect, the base plate and the fulcrum lever link and define a quadrilateral lift frame about the pivotal interconnections. An actuator operatively communicates between the first load member and the fulcrum lever link and the fulcrum lever link provides mechanical advantage to the actuator to cause the quadrilateral lift frame to change from a first configuration at the first position to a second configuration at the second position.

Abstract: An underwater exercise cycle that improves on existing designs through the use of a compact flywheel transmission with adjustable resistance. The invention allows for smooth and continuous pedaling across a range of distinct levels of resistance, thereby enhancing comfort, low-impact, and effectiveness of aquatic exercise.