Abstract: A control system for a motorized valve. The control system comprises a backup circuit comprising energy storage means and a discharge gate through which the energy storage means can be selectively discharged to provide a discharge actuation pulse to the valve to cause the valve to move to a safe (e.g. closed) position. The backup circuit further includes an energy harvesting circuit for harvesting power from the power supply lines. The energy harvesting circuit is able to harvest sufficient energy within the duration for a single actuation pulse provided by the motor controller to charge the energy storage means from zero to a sufficient level to allow the backup circuit to generate at least one corresponding discharge actuation pulse for causing the valve to move to the safe position.

Abstract: A set used to stabilize fractures, including a bone plate; and a bone screw. The bone screw is an angularly positioned locking screw that has a threaded head that cooperates with a threaded hole located in an extrusion of the bone plate; the extrusion of the plate in the area of the hole for bone screw insertion is of a spherical zone shape and is located on a top surface and/or a bottom surface of the plate, and in an area surrounding the extrusion, the top surface and bottom surface are parallel to each other, and a screw head is flush with or below the top surface of the plate; and a locking thread of the screw is flush with or above the bottom surface of the plate.

Abstract: A manually-powered vehicle propelled by muscular force, whose user maintains a standing position, and whose drive is hand-held. The vehicle according to the invention includes two drive wheels, with independent mechanisms installed inside them, which transform the swinging motion of the levers into unidirectional gyration of the drive wheels axis thus driving the vehicle forward, at least one neutral wheel mounted in a way allowing rotation around the vertical axis, and where a low-slung platform is attached directly to the casing of the mechanisms.

Abstract: A manually-powered vehicle propelled by muscular force, whose user maintains a standing position, and whose drive is hand-held. The vehicle according to the invention includes two drive wheels, with independent mechanisms installed inside them, which transform the swinging motion of the levers into unidirectional gyration of the drive wheels axis thus driving the vehicle forward, at least one neutral wheel mounted in a way allowing rotation around the vertical axis, and where a low-slung platform is attached directly to the casing of the mechanisms.