Stairlift device for electric wheelchairs, which is intended for application in chairs for the transport and movement of disabled persons, and where the chair itself is electrically operated, is characterized because it is constituted by two independent systems inserted in each side of the chair, and housed in respective casings of little width, each system consisting of eight teflon wheels or semi-hard rubber, with a serrated profile for its grip on the corresponding steps of the ladder or obstacles to be saved, with the particularity that the set of wheels is operable in ascending and descending directions to occupy a resting position or a position of use and support thereof on the ground, the ascending and descending actuation being carried out by respective hydraulic cylinders driven by electric pumps, the wheels being provided with respective pinions that engage with n other intermediate pinions so that by means of an electric drive motor it produces the rotation of all the pinions, the intermeshing and the rotation of the wheels to effect the displacement through steps or obstacles. (Machine-translation by Google Translate, not legally binding)1. Dispositivo salva-escaleras para sillas de ruedas eléctricas, que estando previsto para su aplicación en sillas destinadas al transporte y movimiento de personas discapacitadas, y en donde la silla propiamente dicha es de accionamiento eléctrico, se caracteriza porque se constituye mediante dos sistemas independientes insertados en cada lateral de la silla, y alojados en respectivas carcasas de escasa anchura, estando cada sistema formado por ocho ruedas de teflón o goma semidura, con perfil dentado para su agarre sobre los correspondientes escalones de la escalera o obstáculos a salvar, con la particularidad de que el conjunto de ruedas es accionable en sentido ascendente y descendente para ocupar una posición de reposo o una posición de uso y apoyo de las mismas sobre el suelo, siendo el accionamiento ascendente y d
