| 摘要 |
<p>1,004,639. Hydraulic brakes; valves. AUTOMOTIVE PRODUCTS CO. Ltd. Nov. 12, 1963 [Dec. 17, 1962], No. 47577/62. Headings F2F and F2V. A liquid pressure master cylinder 10 for vehicle brake systems is provided with a valve 31 to control the flow of liquid through a pressure outlet 15, the valve comprising a body member 41 which, under the pressure of a spring 44, is adapted to make sealing engagement with a seat around the pressure outlet 15 and the concave arcuate surface, the body member of the valve is formed with an orifice 51 which is controlled by a resilient blade-like member 53 so that the member 53 is displaced by the liquid flowing out of the master cylinder through the pressure outlet. As shown in Figs. 2 and 3 the valve body 41 has an interrupted flange 42 to guide it in the master cylinder barrel 10. On brake release the blade-like member 53 is urged against the peripheral surface of the recess 46 by liquid returning into the master cylinder so that liquid can enter the master cylinder only so long as the pressure is sufficient to compress the spring 44 of the master cylinder and move the valve body 41 away from the end of the cylinder. On brake application outward flow of liquid displaces the blade-like member 53 away from the peripheral wall of the recess and allows the liquid to flow through the orifice 51. The provision of an orifice in the peripheral wall of the recesses of the valve body 41 causes the liquid to tend to flow in a circular path around the valve body to effect scavenging of air from the master cylinder. A small hole 54 in the centre of the body 41 enables final equalisation of pressure to take place.</p> |
