Patent ID: 8439303
Filing Date: 2013-05-14
Classification: B64C

Abstract:
1. An undercarriage for a rotary wing aircraft, the undercarriage including a tubular structure with skids, said tubular structure being designed to be mounted under or in a bottom portion of the aircraft, the tubular structure comprising left and right longitudinal portions that are retractable, each of the left and right longitudinal portions comprising a pivot arm having an inside end and an outside end connected to a respective one of the skids, each of the left and right longitudinal portions being suitable for moving between a retracted position in a cruising flight configuration and a deployed configuration in a landing configuration, wherein the undercarriage includes drive means for moving the left and right longitudinal portions between the retracted position and the deployed position, characterized in that, for each pivot arm, is provided with a pivot positioned between the inside end and the outside end, the drive means comprise a respective threaded rod having a rod free end and a rod fixed end that is designed to be hinged to a stationary support, said threaded rod passing through the inside end of the corresponding pivot arm, the drive means also comprising a self-supporting electric or hydraulic motor, which motor moves on said threaded rod, and against which the inside end of the pivot arm comes to bear.