| 摘要 |
<p>898,926. Valves. ROSS OPERATING VALVE CO. sept. 12, 1960 [Oct. 5, 1959], No. 31402/60. Class 135. A solenoid-operated valve comprises a poppet valve member 37 formed of two parts 39, 41 secured together and loaded by a spring 46 towards a first valve seat 36 and movable, on energizing a solenoid, into contact with a second seat 35. A T-shaped armature 49 of the solenoid, which includes a U-shaped core 16, carries a guide member 51 to which is secured a pin 53 having a head 55. A collar 56 slidably surrounds the pin and a helical spring 58 is located between the collar and guide urging the collar into contact with the movable valve member 37 and the head 55 of the pin 53 into contact with the collar whereby a gap is formed between the head 55 and the valve member 37. The spring 58 is of greater strength than the spring 46 such that on energizing the solenoid, the armature moves downwards and through the spring 58 moves the valve member on to seat 35 after which, further movement of the armature compresses the spring 58, the gap between the head 55 and valve member in the de-energized position being sufficient to allow full movement of the armature. On de-energizing the solenoid, the armature moves upwards under the action of spring 58 until the upper side of head 55 contacts the collar after which, the valve member 17 and armature move under the action of spring 46 until the valve member contacts the upper seat 36. The valve closure member is formed by a resilient member 45 formed on a flange 44 and controls the supply and exhaust of fluid to and from an outlet port.</p> |
