HYDRAULIC DRIVE Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: each hydraulic motor is connected with delivery and drain hydraulic lines trough a distributor. A flow meter is connected in the drain hydraulic line and connected with a device for cutting-off a source of pressure. The device is provided with normally closed and normally open contacts connected in the supplying circuit of the device in series. By-pass and safety valves are connected in series and coupled with the drain hydraulic line by their outlets. The inlet of the safety valve is immediately connected with one of the distributors and with the inlet of by-pass valve and with the delivery hydraulic line through a throttle. Double- position two-linear spring loaded distributor is connected in parallel to the flow meter. The space of the distributor is immediately connected to the inlet of the safety valve and controls the normally closed contact through the throttle. EFFECT: improved design. 1 dwg