公开(公告)号：US3880049A

公开(公告)日：1975-04-29

申请号：US42849573

申请日：1973-12-26

Applicant: BENDIX CORP

Inventor： GRABB FREDERICK G ,  OWENS CARL D ,  CRIPE MAXWELL L ,  PULASKI DANIEL C

IPC: B60T13/56 ,  B60T13/57 ,  F15B9/10 ,  F01B25/02

CPC classification number: B60T13/57

Abstract: A servomotor having a first valve for controlling the communication of vacuum and air at atmospheric pressure and a second valve for controlling the communication of air above atmospheric pressure to move a wall in response to a created pressure differential. A plunger moved by a push rod will progressively operate the first and second valves to provide a substantially uniform force for operating a brake actuator. A check valve located in the flow path of the air at atmospheric pressure will prevent the air above atmospheric pressure from being diverted to the atmosphere upon operation of the second valve.

Abstract translation: 一种伺服电动机，其具有用于控制大气压力下的真空和空气的连通的第一阀和用于控制高于大气压力的空气的连通的第二阀，以响应于产生的压力差来移动壁。 通过推杆移动的柱塞将逐渐操作第一和第二阀，以提供用于操作制动致动器的基本均匀的力。 位于大气压下的空气流动路径中的止回阀将防止在第二阀操作时高于大气压的空气被转移到大气中。