| 摘要 |
<p>An operating mechanism for a gas valve, the mechanism comprising a cam (20), a cam follower (22) and an operating arm (26) mounted for movement with a gas valve mechanism so that movement of the operating arm operates the gas valve mechanism to control the flow of gas therethrough; the cam follower being coupled to the operating arm by means of a solenoid actuator (28) operable to move the cam follower from a first position relative to the operating arm in which the cam follower (22) does not contact the cam and a second position relative to the operating arm in which the cam follower engages the cam; the cam being rotatable when the cam follower is in the second position to cause the cam follower and, hence, the operating arm to move therewith to operate the gas valve mechanism.</p> |
