公开(公告)号：US3747337A

公开(公告)日：1973-07-24

申请号：US3747337D

申请日：1971-08-02

Applicant: BENDIX CORP

Inventor： GARDNER D ,  ROSSIGNO L ,  MC CORMICK L

IPC: B60T13/22 ,  B60T17/22 ,  F15B7/00

CPC classification number: B60T17/22 ,  B60T13/22 ,  Y10T137/8326 ,  Y10T137/86919

Abstract: A power brake system for a parking brake having a hydraulically operated spring brake with a manual control. A single stroke pump responsive to a pressure differential created by the flow of a first and second fluid under pressure regulated by the manual control is capable of pressurizing hydraulic fluid. This pressurized hydraulic fluid is adapted to overcome the resiliency of the spring brakes to maintain the parking brake in a released position. A flow control device adjacent the manual control will assure that a constant differential pressure is maintained in the pump to stabilize the force of the pressurized hydraulic fluid. An indicator responsive to the pressure of the hydraulic fluid provides a visual indication of the operational mode of the spring brake to an operator.

Abstract translation: 一种用于具有手动控制的具有液压操作的弹簧制动器的驻车制动器的动力制动系统。 响应于由手动控制调节的压力下由第一和第二流体的流动产生的压力差的单冲程泵能够对液压流体加压。 该加压液压流体适于克服弹簧制动器的弹性，以将驻车制动器保持在释放位置。 与手动控制相邻的流量控制装置将确保在泵中保持恒定的压差以稳定加压液压流体的力。 响应于液压流体的压力的指示器向操作者提供弹簧制动器的操作模式的可视指示。