Safety gas valve with timer

摘要

The valve comprises a valve block (11) having a passage (12) communicating with an inlet (13) communicating with a controlling valve of a gas tank and an outlet (14) connecting with a gas cooker. The passage contains a valve seat (121) closable by a first valve means (33) attached to a push rod (31). A settable timer (3) is operable to hold the valve means (33) open against a closing bias (37) by engagement of a base plate (36) thereof with the push rod (31). The push rod is released after a preset time to allow the valve means (33) to close with sounding of a bell (321,7). Between the inlet (13) and the first valve means (33) is a second valve means having a seat (341) closable by a loose ball (21). The ball (21) closes the seat (341) when there is a sudden reduction of pressure downstream of the second valve means e.g. due to a broken gas pipe. Release of the ball is effected by a manually operable bar (2, Fig. 4). The valve also includes a pressure gauge (4) and a pressure- regulator (5, Fig. 4).