| 摘要 |
<p>The device has a shutter (21) for opening and closing the discharge valve (11); a float (22) connected to the shutter (21) and for delaying closing of the valve (11); a rocker arm (47) connected to the shutter (21); and a pair of elements (56, 57) hinged to the rocker arm (47). The elements (56, 57) are activated alternatively, by a control member (55) fitted to a button (36), to respectively open the valve (11) and close the valve following partial discharge. The rocker arm is in the form of a rectangular frame (47), while each element is defined by two arms (58, 59) connected by a crosspiece (61). The frame (47) carries two tongues (68, 69) for pushing the elements (56, 57) into an engaged position defined by a vertical rib (66) of a fixed structure (23). The fixed structure has two arms (24), and a crosspiece (26) in which a sleeve (31) for fastening a cup-shaped support (37) of the button (36) slides but is not allowed to rotate. <IMAGE></p> |
