| 摘要 |
<p>1,113,141. Valves. VAPOR CORPORATION. 16 Feb., 1966 [5 May, 1965], No. 6755/66. Heading F2V. [Also in Division G3] Valves usable in a control system (see Division G2-- G3) that regulates a pilot's suit pressure in dependence upon cabin pressure or atmospheric pressure include a diaphragm-actuated looseball valve 90 (Fig. 7), a pressure regulator 98 (Fig. 8) and a main valve 20 (Fig. 11), the latter being inserted in the line supplying the cabin and the suit. In the valve of Fig. 7, a ball 222 is biased into engagement with a seat 219 by a spring 224 acting on a cup-shaped ball-support 220, the ball being unseated by a tappet 214 engaged by a spring seat 193 carried by diaphragm 190. The diaphragm is loaded on opposite sides by springs 199, 202 and is responsive to suit pressure at 191 and cabin or atmospheric pressure at 192. The ball controls leakage from a chamber 229 supplied via a restriction. In the regulator of Fig. 8, a ball 126 is urged away from seat 124 by spring 156 acting via diaphragm 132 and plunger 140. Air enters via filter 112 and flows to radial outlet ports 148, 149. When the outlet pressure exceeds a predetermined value, it acts on diaphragm 132 to withdraw plunger 140 thereby allowing spring 130 to seat ball 126. In the valve of Fig. 11, a piston 78 is fast with a spindle 60 and sleeve 74, and a closure member 76 is urged by spring 88 against a stop 75 on sleeve 74. A spring 86 urges the piston rightwardly. Normally the piston and closure member move together under the influence of a control pressure admitted at 52 and upstream pressure at 55. However, if the control pressure is excessive, the upstream pressure unseats the closure member as shown against the action of spring 88.</p> |
