| 摘要 |
<p>586,975. Fluid-actuated valves. BENDIX AVIATION CORPORATION. Aug. 9, 1944, No. 15177. Convention date, Oct. 20, 1943. [Class 135] In a fluid-actuated valve for dividing the flow of pressure fluid between a main outlet 52 and an auxiliary outlet 50 to maintain a predetermined flow through the main outlet, a valve member 64 is slidable in a bore 54 to control inversely the flow of fluid to them from two spaced passages 60, 62, each connected through a conduit 58 with the inlet 53, and the part of the conduit between the passages is formed with a constriction, the pressure drop across which is communicated to the valve to regulate its position. As shown, the conduit 58 is formed as a venturi tube, the throat of which communicates, via a passage 84, an annular cut-away 82 and a'passage 76 in the valve member, with a chamber 78 on the right of the valve member, whose other end 74 is coned to allow the fluid pressure in front of the venturi to act thereon at all times. The valve member 64 is normally urged to the left by a spring 70 to close the outlet 50 and open the outlet 52, but when the flow through the venturi is sufficiently great, the differential pressure between the two ends of the valve member moves it to the right to a position of balance, partially opening the outlet 50 and restricting the outlet 52. Further variations of flow rate within the range of operation of the valve will then react thereon to alter its position of balance and keep the flow through the outlet 52 constant. In Fig. 1 (not shown), the valve is applied to a motor vehicle fluid pressure system for the power operation of steering, brakes and other functions. Specification 568,921 is referred to.</p> |
