GB654866A - Improvements in lift trucks - Google Patents

Abstract

654,866. Load lifting truck. THORNTON, A. A. (Ross Carrier Co.). Nov. 23, 1948, No. 30402. [Class 78 (iii)] A self-propelled lift truck has an upstanding frame mounted on the front portion of the truck and another frame slidable upon the first frame and a load-lifting and lowering member, the sides of the two frames are disposed in laterally spaced relation, and lifting means for the load-lifting and lowering member are disposed adjacent the upstanding sides of the frames, whereby to provide unobscured forward visibility to the operator of the truck between the upstanding frames. The frame 26 comprises two spaced side channelled members, having cross connections at the top and bottom and mounted to tilt about a cross shaft 35 at the front of the vehicle 21, by means of brackets 31 connected to pistons 39 and hydraulic cylinders 37. A second frame 42 is mounted to slide on the frame 26 having a top closure member 47 and cross connections. A load carrier having load-engaging arms 77 is mounted by brackets 78 and 79 on members 75 and 76 of a framework 73 which has rollers 83, 85 and 86 which contact the walls of the frame 42. A chain 68 connects between the framework at 71 and the top of the frame 26 at 69 passing over sprocket wheels 67 on shaft 66. A cylinder 52 is incorporated in each side member 26, being screwed into the base by screws 53 and having a piston 56 with top and bottom closures 58, 57. The shaft 66 is mounted in a block 64 connected between the member 47 and the piston and air inlet pipes 111 supplies fluid to the cylinder 52. A handle 94 operates a main multiple valve which comprises single and double-acting control valves controlling the vertical movement of the secondary frame and the tilt of the load carrier. The valve is connected between a pump and a fluid reservoir and the pairs of hoist and tilt cylinders, the fluid passing through a reverse flow control valve and a directional flow valve. Either or both cylinders may be put into operation. Tilting can be effected simultaneously with hoisting the fluid passing through a check valve and having a flow limiting orifice.