Abstract: A device for lifting, supporting and moving large vehicle wheels allows a single person to install and remove wheels. The device has a U-shaped frame with two opposed straight sides connected by a jack side of the frame. Lift arms rotatably affixed to the opposed straight sides have rotatable rollers that contact the vehicle wheel. The lift arms are connected to a jack via chains that translate vertical motion from the jack to raise the lift arms, and thus raise the vehicle wheel. The rollers allow a user to rotate the vehicle wheel to position it for reinstallation onto the vehicle. A stabilizer bar rotatably affixed to the frame contacts the vehicle lift to stabilize the wheel during use of the device.

Abstract: A multi heliostat concentrating (MHC) system for utilizing sun energy has at least on MHC module. A MHC module has at least one optical concentrator having a focusin reflective surface, aperture and an optical axis. A plurality of heliostats, which are preferably located symmetrically relative to the optical axis of an optical concentrator simultaneously reflect sun radiation towards its aperture. Flux error correcting an flux homogenizing device disposed at the focal region of an optical concentrato provides for further concentrating and homogenizing the flux of the focused su radiation. A receiver preferably comprising concentrated photovoltaic cells and a optional passive heat-sink provides for efficiently and economically generatin electrical power.