| 摘要 |
<p>1,073,539. Valves. H. TEVES, E. A. TEVES, and M. TAUSEND, [trading as ALFRED TEVES MASCHINENUND ARMATURENFABRIK KOMM.-GES.]. Dec. 1, 1964 [Dec. 17, 1963], No. 48745/64. Heading F2V. An automatic valve for alternately connecting a pump 2 to a pressure accumulator, via a line 4, and a reservoir 1, via a line 5, is characterized in that the ball 11 controlling flow to the reservoir is biased to the closed position by a spring 9 and a disc-shaped armature 19 attracted by a permanent or electromagnet 22, the arrangement being such that when the pressure in chamber 17 reaches a predetermined value and moves ball 11 away from its seat 13, the force exerted by the biasing means decreases and consequently the valve opens quickly. When the valve 11, 13 opens the valve 10, 12 closes under the action of spring 8 and the pressure in line 4 to isolate the accumulator. When the pressure in the accumulator falls, ball 10 is moved away from seat 12 by the spring 9 acting on it via tappet 21. Each ball is arranged to present a larger area to the pressure fluid within chamber 17 as soon as it is cracked open to assist rapid opening, and throttling grooves 14, 15 are provided to prevent reverse flow.</p> |
