Hydraulic system for raising and lowering loads - includes motor driven pump delivering fluid to reservoir and solenoid check valve actuating reverse movement of load

摘要

The system for fork lift trucks includes a pump (16) which is operable, pref. by an electric motor, to deliver fluid from a reservoir (18) to a remote jack (10) through a pipe (20). A solenoid-operated check-valve (26) of an assembly (24) integral with jack (10) effects raising of a load by the jack (10). The pump (16) is adapted to allow fluid to pass through in the opposite sense and the system is arranged such that upon actuation of valve (26) fluid is returned from the jack (10) through a flow regulator (27) of assembly (24) and thence through the pipe (20) and the pump (16) to the reservoir (18) in order to lower the load.