| 摘要 |
<p>1,198,217. Valves. INGENIORSFIRMAN FLIESBERG A.B. 1 Nov., 1968 [21 March, 1968], No. 61946/68. Heading F2V. [Also in Division G3] A vacuum regulator has a cylindrical slide valve body with opposed ports 13, 14 for selectively connecting a source of vacuum connected at 3 and atmosphere connected at 4 to a space to be regulated which is connected at 2. A piston 11 movable in accordance with the pressure in the regulated space controls the movement of the valve body. The edge of the ports 13, 14 which is uncovered first includes an obtuse angle with curved sides.</p> |
