公开(公告)号：US3910046A

公开(公告)日：1975-10-07

申请号：US51141374

申请日：1974-10-02

Applicant: BENDIX CORP

Inventor： GARDNER DELBERT J ,  SISCO WILLIAM C ,  GRABB FREDERICK G ,  OWENS CARL D

IPC: B60T13/565 ,  F15B7/00

CPC classification number: B60T13/565

Abstract: A pressure differential controlled valve for use in a two stage servomotor to delay the communication between a second pressurizing chamber and a first pressurizing chamber until compensatory fluid, which is lost from the first pressurizing chamber in the transfer of the development of an operational force from a first diameter on a power piston to a second diameter on the power piston is replaced.

Abstract translation: 一种用于两级伺服电动机的压差控制阀，用于延迟第二加压室和第一加压室之间的连通，直到在从第一加压室转移操作力的过程中从第一加压室丢失的补偿流体 动力活塞上的第一直径到动力活塞上的第二直径被替换。

公开(公告)号：US3617097A

公开(公告)日：1971-11-02

申请号：US3617097D

申请日：1970-04-15

Applicant: BENDIX CORP

Inventor： GRABB FREDERICK G

IPC: B60T13/14 ,  B60T13/22

CPC classification number: B60T13/141 ,  B60T13/22

Abstract: A spring brake used in a dual full-power braking system to provide parking and emergency braking. The modulated spring brake is controlled by an inversion valve that has an override system whereby the emergency braking is not applied unless the front brakes have a pressure differential greater than a predetermined amount in the rear brakes. From this pressure differential, the spring brakes are applied simultaneously with the front brakes to provide the necessary emergency stopping. The amount of application of the spring brakes is proportional to the amount of pressure differential in excess of the predetermined amount. The parking brake is an externally connected cam and lever mechanism for operating the inversion valve.

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。

公开(公告)号：US3617096A

公开(公告)日：1971-11-02

申请号：US3617096D

申请日：1970-04-27

Applicant: BENDIX CORP

Inventor： GRABB FREDERICK G ,  FULMER KEITH H ,  SCHULTZ HAROLD B

IPC: B60T13/14 ,  B60T13/22 ,  B60T17/22 ,  B60T13/04

CPC classification number: B60T17/22 ,  B60T13/141 ,  B60T13/22

Abstract: A emergency and parking valve used in a dual full-power system that provides two means to hold off a spring brake. The emergency and parking valve, which contains two independent valves, may be actuated by one of two means. The first means is the parking brake lever and the second means is a pressure differential between each half of the dual full-power system. Because the spring brake is modulated, it may be used to give smooth emergency stops when the pressure differential is sensed. Pressurized fluid to hold off the spring brake is received from each half of the split system so that loss of pressure in one spring brake conduit will not cause an application of the spring brake unless pressure is lost in both spring brake conduits.

公开(公告)号：US3910047A

公开(公告)日：1975-10-07

申请号：US48143274

申请日：1974-06-20

Applicant: BENDIX CORP

Inventor： GRABB FREDERICK G

IPC: B60T11/224 ,  B60T13/565 ,  F15B7/00 ,  F15B7/08

CPC classification number: B60T11/224 ,  B60T13/565

Abstract: A control valve is activated by a first plunger upon movement of an input push rod to develop a pressure differential across a movable wall which produces an output force. This output force is carried through a first piston on which a concentric second piston is retained between a first stop and a second stop. A spring urges the second piston toward the first stop in opposition to a first hydraulic pressure developed by the second piston moving in a pressurizing chamber. When the first hydraulic pressure is sufficient to hold the second piston against the second stop a ball valve connected to an output chamber is closed. The first hydraulic pressure will unseat the first ball valve until an input force moves a second plunger to proportionally open a poppet valve and allow a portion of the first hydraulic pressure to escape into a relief chamber. As the first hydraulic pressure is reduced, the movable wall moves the first piston in the output chamber to develop a second hydraulic pressure.

Abstract translation: 当输入推杆移动时，控制阀由第一柱塞启动，以在产生输出力的可动壁上产生压力差。 该输出力被承载在第一活塞上，同心的第二活塞保持在第一止动件和第二止动件之间。 弹簧将第二活塞推向第一止动件，与第二活塞在加压室中移动的第一液压反应。 当第一液压足以使第二活塞抵靠第二止挡时，连接到输出室的球阀关闭。 第一液压将使第一球阀转动，直到输入力移动第二柱塞以成比例地打开提升阀并允许第一液压的一部分逸出到释放室中。 当第一液压降低时，可移动壁使输出室中的第一活塞移动以产生第二液压。

公开(公告)号：US3589131A

公开(公告)日：1971-06-29

申请号：US3589131D

申请日：1969-03-24

Applicant: BENDIX CORP

Inventor： GRABB FREDERICK G

IPC: B60T13/56 ,  B60T11/20 ,  B60T13/565 ,  F15B7/00

CPC classification number: B60T11/20 ,  B60T13/565

Abstract: A pressure ratio changer for selectively responding to a first source of force and a second source of force to pressurize a fluid chamber. A first piston connected to the first source of force is slidably retained in the fluid chamber. A second piston concentrically carried by the first piston has its axial movement limited in one direction by a flange of the first piston. A third piston concentrically carried by the second piston has its axial movement restricted in both directions by a flange on one end and snap ring on the other. The third piston moves in response to an operator activation member to close the fluid communication between the master cylinder piston and the first and second pistons. Now, the reactive force transmitted from the master cylinder piston is proportioned through a reactive chamber to the first and second pistons to bring the system into equilibrium upon activation by an operator.