| 摘要 |
<p>577,999. Brakes. BENDIX AVIATION CORPORATION. March 22, 1944, No. 5375. Convention date, March 22, 1943. [Class 103 (i)] Relates to braking-systems wherein the pressure fluid from a manually operated master cylinder controls a valve which regulates pneumatic energy supply to a booster which operates an auxiliary master cylinder connected to the brake cylinders. In the construction shown in Fig. 3, the system described in Specification No. 550,450 is modified by placing the check valve 72 between the plunger of the auxiliary master cylinder 28 and the brake cylinders instead of in the master cylinder. This permits. residual pressure to be maintained in the brake cylinders whilst the remainder of the system is at atmospheric pressure during brake release. This ensures that the power-assister will operate almost immediately the pressure in the master cylinder is raised above reservoir pressure, while pedal flutter caused by the lag between action and reaction is avoided. The same advantages are obtained in the system shown in Fig. 5; which is a modification of the double line system described in Specification 557,762. The reaction of the air pressure on the plunger 110 is prevented from being transmitted to the master cylinder 10 through the pipe 106, by the provision of the passage 118 leading from the space 108 to the space 116, the latter space being enlarged by the movement of the piston 92 almost immediately the pedal is operated. The enlarged space accommodates the displaced liquid, and a spring-pressed ball valve 120 prevents liquid displacement in the opposite direction.</p> |
