HYDRAULIC DRIVE WITH FLOW ALARM VALVE Russian patent published in 2013 - IPC B62D5/06 F16K17/02 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Hydraulic drive with alarm valve comprises primary hydraulic drive with engine-driven primary pump and emergency hydraulic pump with motor-driven check valve. Primary pump pressure line incorporates flow alarm valve to be connected to emergency pump pressure line. Alarm valve is composed of a check valve incorporating contactless Hall transducer. Alarm valve body has two inlet channels and one discharge channel and through bore with check valve seat. Hollow rod with check valve gate is arranged in said bore to displace in inside the cover fixed in the body through bore. Spring to rest on cover end face and press check valve gate to its seat is fitted inside the rod on one side. Permanent magnet to interact with Hall transducer without direct contact is arranged on opposite side of rod cavity. Hall transducer is arranged inside body bore is aligned with the rod and coupled with emergency pump drive motor.

EFFECT: higher reliability.

2 dwg