Abstract: A suction device for the removal by suction of waste gases or other environmentally harmful gases from a working location, e.g., from the exhaust pipe of an automotive vehicle, including a suction line which is connected to a central suction means or to a suction fan and one end of which is intended to be connected temporarily to, e.g., an exhaust pipe of an automotive vehicle or the like for the purpose of removing by suction exhaust gases deriving from the engine of the vehicle. In order to enable the suction line of such suction devices to be extended manually, even when the suction line is suspended vertically directly from a ceiling-mounted main suction line, the suction line is telescopic and a spring is mounted between the telescoping part of the suction line, such that the spring will be tensioned when the suction line is extended and therewith assist in restoring the suction line to its retracted state.

Abstract: A device for spot or local extraction of polluted air, dust and other gases and particles from a room, comprising a flexible hose connected to a suction pipe or fan and a supporting member carrying the hose and mounted on a wall or other preferably vertical surface in the room for pivotal movement about a preferably vertical axle. For achieving great range independently of the ceiling height in the room, in which the device is to be used, the supporting member comprises a hinged supporting arm, which is pivotal about said axle, and each joint axle of which is located in parallel with said axle, and an operating arm, which by a friction joint is connected to the outer end of the supporting arm for movement about an axle perpendicular in relation to the joint axle or axles of the supporting arm.