| 摘要 |
<p>944,822. Fluid-pressure brakes. BENDIX WESTINGHOUSE AUTOMOTIVE AIR BRAKE CO. July 5, 1961 [July 14, 1960], No. 24282/61. Addition to 944,821. Heading F2F. The fluid-pressure braking system of the parent Specification is modified in that when the pressure of the source is below the predetermined value the cylinder for releasing the spring-operated actuator is exhausted from the second valve directly to atmosphere, so that the first valve does not have to be moved to its inoperative position to cause a spring brake application. As shown, the exhaust port 124 of the valve 92 is open to atmosphere, instead of being connected with the pipes 50, 52 leading to the compressed air actuators 36, 38 as is the case in the system disclosed in the parent Specification. An additional pipe 109 leads from the pipes 50, 52 to the exhaust port 108 of the quick-release valve 106 so that exhausting of the cylinders 74 is also effected via the driver's valve 34 when this is in the inoperative position. The valve 92 is simplified since it is no longer necessary to render it insensitive to change of pressure at the exhaust outlet, there being merely a valve member 132 comprising an inlet valve 134 and an exhaust valve 138, plunger 128 sealed by 0-ring 130, and spring 142.</p> |
