Multi-way switch element for controlling acoustics of exhaust has one or more perforated discs rotatable about axis to simultaneously or successively open or close openings in gas pipes

摘要

The switch element comprises at least one perforated disc (2) which is rotatable centrally or eccentrically about an axis (10) and thereby simultaneously or in succession opens or closes wholly or partly openings in the intermediate walls (12, 13) and/or pipes (1, 4, 6, 7, 9) for the gases. Several such discs can be mounted on a shaft (10) and can be circular, oval, or polygonal.