| 摘要 |
<p>An hydraulic pressure store (1) has a spring loaded valve 10 moved to its closed position by a gas-filled bag 3 when the store is empty, the valve being provided with an actuating device (13 to 15) which is controllable to vary the degree of valve opening. The actuating device may be controlled magnetically or hydraulically e.g. by a servo-valve 18 controlling the supply to working chambers 14, 15 on opposite sides of a piston 13 connected by a shaft 12 to the valve closure member 11 of the valve. <IMAGE></p> |
