Abstract: A vertical takeoff and landing unmanned aerial vehicle (VTOL-UAV) is provided consisting of one central motor which drives one ducted fan and one or more rotors. These rotors can be coaxial with the fan, or can be located off-center being driven via a transmission. For flight control purposes, all or a portion of the air circulated by the ducted fan and/or by the central rotor is diverted through a plurality of side ducts towards the periphery of the vehicle and then downwards, each of these side duct being fitted at their peripheral ends with air-flow vectorization means. These air-flow vectorization means can be in the form of parallel vanes, and/or in the form of thrust-control buckets, which are turnable around axes perpendicular to the flow of air, and are actuated by servomotors via cables or linkages.

Abstract: The present invention is concerned with an apparatus for simulating the chewing process for the purpose of testing dental materials and implants and for the purpose of analyzing food samples. The apparatus comprises a frame, a stationary platform connected compliantly to the said frame and a moving platform corresponding to the maxillae and mandible of humans or animals, to which dentures or teeth are affixed. The moving platform is guided and driven in mandibular motion using six rods fitted with spherical joints at both ends. Said ball-jointed rods are attached with one end to the moving platform, and with the other end either to the frame of the apparatus, or to rotary cranks driven synchronously by a motor via a transmission. The rotary cranks together with their motor and transmission are mounted on a carrier which is adjustably attached to the frame of the apparatus.

Abstract: A vertical takeoff and landing unmanned aerial vehicle (VTOL-UAV) is provided consisting of one central motor which drives one ducted fan and one or more rotors. These rotors can be coaxial with the fan, or can be located off-center being driven via a transmission. For flight control purposes, all or a portion of the air circulated by the ducted fan and/or by the central rotor is diverted through a plurality of side ducts towards the periphery of the vehicle and then downwards, each of these side duct being fitted at their peripheral ends with air-flow vectorization means. These air-flow vectorization means can be in the form of parallel vanes, and/or in the form of thrust-control buckets, which are turnable around axes perpendicular to the flow of air, and are actuated by servomotors via cables or linkages.