Patent ID: 6350100
Filing Date: 2002-02-26
Classification: B66F

Abstract:
A device for controlling tilt of a mast provided in a forklift, the mast supporting a fork for carrying an object so that the fork is lifted or lowered, the device comprising:a hydraulic cylinder for tilting the mast; a first valve for controlling supply of a fluid to the cylinder; an operating member for operating the first valve, wherein the first valve supplies fluid to the cylinder in correspondence with the position of the operating member, the cylinder tilting the mast at a speed corresponding to the flow rate of the fluid supplied by the first valve; a fluid passage between the cylinder and the valve, the fluid passage including a plurality of parallel passages; and a plurality of parallel, two-way controllable valves between the first valve and the cylinder for restricting the flow rate of the fluid passing through the fluid passage depending on the height of the fork, each of the plurality of parallel valves being along a respective one of the plurality of parallel passages, whereby the flow rate of fluid through said parallel passage may be controlled by said two-way valves.