{
  "$type": "site.standard.document",
  "description": "A hydraulic drive device (16) for cargo handling vehicle has: a tank (19); a pump (17) for drawing in a hydraulic oil from the tank and supplying the hydraulic oil to hydraulic cylinders; an electric motor (18) for driving the pump; a solenoid-controlled proportional valve (48) disposed between an…",
  "path": "/patents/965568",
  "publishedAt": "2014-12-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L1/003",
    "TOYOTA JIDOSHOKKI KK [JP]"
  ],
  "textContent": "A hydraulic drive device (16) for cargo handling vehicle has: a tank (19); a pump (17) for drawing in a hydraulic oil from the tank and supplying the hydraulic oil to hydraulic cylinders; an electric motor (18) for driving the pump; a solenoid-controlled proportional valve (48) disposed between an inlet port of the pump and a bottom chamber of an up-and-down hydraulic cylinder (4) and configured to open with a valve travel depending upon a control input of a descent control of an up-and-down control member; a pressure compensation valve (50) disposed between a branch portion located between the pump and the solenoid-controlled proportional valve and the tank and configured to open with a valve travel depending upon a pressure difference between pressures upstream and downstream of the solenoid-controlled proportional valve; and a valve (53) disposed between the pressure compensation valve and the tank and configured to be switched between an open position and a close position.",
  "title": "Hydraulic drive device for cargo handling vehicle"
}