公开(公告)号：EP1276568A4

公开(公告)日：2007-06-13

申请号：EP00984622

申请日：2000-12-08

申请人： AUSTRALIAN DISTRIB PTY LTD

发明人： KATZ PETER

IPC分类号： B06B1/18 ,  B63C11/26 ,  G10K1/068 ,  B63C11/22 ,  G08B3/06

CPC分类号： B63C11/26 ,  G10K1/068

摘要： A signalling device (10) adapted to make a percussive sound, for example, under water. The signalling device (10) may be attached to a pressurised fluid source, such as a diver's compressed air supply, the device (10) including: a housing (12) having a passageway (22), at least in part, for communication with the fluid source; a valve member (34) located in the passageway (22) and movable between a closed position in which it substantially blocks the passageway (22), and an open position in which fluid may flow through the passageway (22); biasing means (42), such as a spring, biasing the valve member (34) towards the closed position, wherein the valve member (34) reciprocates between the open and closed positions when a pressure difference above a set value exists on either side of the valve member (34) to produce a percussive sound.