HYDRAULIC MANIPULATOR Russian patent published in 1994 - IPC

FIELD: handling equipment. SUBSTANCE: working member, hydraulic cylinders for arm and forearm rotation are mounted on the end of a forearm. The fastening points of the hydraulic cylinders are circumferentially located on the arm, the circle radius r₁ is equal to the circle radius r₂ of the fastening points of these hydraulic cylinders on the forearm. The ratio of the area of the working cavity of the arm rotation hydraulic cylinder F₁ to the area of the working cavity of the forearm rotation cylinder F₂ is equal to the ratio of the speed of rotation of the forearm V₂ to the speed of rotation of the arm V₁. The like cavities of the hydraulic cylinders for arm and forearm rotation communicate with each other according to a differential circuit through a hydraulic distributor-spool and valves. EFFECT: improved structure. 2 dwg