| 摘要 |
Control valve means for automatic and manual control of fluid flow in a hydraulic circuit supplying a parking brake. The control valve means includes detent means for engaging a valve member to automatically permit fluid flow to brake with normal fluid pressure in the hydraulic circuit. The detent means are manually disengageable to reduce fluid pressure in the brake mechanism to engage the brake. Upon an inordinate pressure reduction in the hydraulic circuit, the detent means automatically release to allow engagement of the parking brake. |
