| 摘要 |
A dispensing nozzle has a body (10) adapted to be connected to a supply of liquidified petroleum gas by connector piece (11) and to a vehicle gas tank by a threaded insert (19) in swivel nut (15). Gas is applied to the reservoir within the valve body (24) through the connector piece (11) and is delivered through a main valve having a valve seat (33) and a piston valve (23). Piston valve (23) and valve cylinder (22) form a dash pot which is pressurised by gas flowing through passageway (37). There is an annular gap between the piston valve (24) and the valve cylinder (22) through which gas will bleed as soon as the valve (23) is cracked from its seat (33) to reduce the pressure in the dash pot which enables easy opening of the main valve. The swivel nut (15) is locked in position by pin (20) which engages one of a plurality of recesses (21) at its rear face when the nozzle is open. |
