Patent GB-865590-A (GB)
Title: Improvements relating to self-propelled mobile lifts
IPC: B66C19/00
Filed: 1959-09-25
Abstract: 865,590. Lift trucks. BAUDHUIN, G. J. Sept. 25, 1959 [Oct. 8, 1958], No. 32737/59. Class 78 (3). [Also in Group XXXI] The frame of a mobile lifting device comprises longitudinals 23 and 24 to which is rigidly attached at the front end a U-shaped member 31, 32, 33. A rear U-shaped member 31, 32, 33 is slidingly mounted on the longitudinals and can be locked by a clamping-screw 42. Hoisting mechanisms 28 are carried by the U-members. Wheels 26 are carried by yokes 52 attached to the sleeves 39 upon which the rear U-frame slides and front wheels 25 are carried by yokes 47 mounted for turning about a vertical axis in bearings 48, both front and rear sets of wheels being mounted in the same vertical planes as the respective U-frames. An hydraulic motor 56 is mounted on a platform 57 attached to each front yoke 47 and drives each wheel 25 through a chain 62 and sprockets 61 and 63. Hydraulic cylinders 65 are connected to the side beams 23 and 24, Fig. 4, and to cranks 74 whereby the front wheels are steered. A 4-way control valve 69 is mounted on each cylinder 65 for movement therewith and has a control ball stud 71 movable relative to the valve from neutral to an operative position. The movement of the cylinders is such that the stud 71 is returned to its neutral position. Each stud 71 is operated through a link 81 and crank 79, a rotatable upright rod 76 journalled in bearings 77, the rods 76 on each side being connected by a rod 83, Fig. 3, a control arm 84 being attached to one rod 76 and being disposed adjacent a control platform 91. A hoisting apparatus 28 comprising a pair of winches 101 and 102 mounted on the same shaft and driven from an hydraulic motor 113 through a reduction gear 112 and chain-andsprocket drive 108, 109, 111, is supported upon brackets 104, 107 upon each U-frame. Cables 118 and 119 passing over sheaves 121 and 124 are operated from the winches. The motor 113 and reduction gear 112 are mounted upon a platform 114 pivoted to the bracket 107 so as to permit tensioning of the chain 109 (Fig. 3). The hydraulic circuit, Fig. 8, comprises a reservoir 131 and a pair of pumps 134, 135 driven by an internal-combustion engine 133 (Fig. 2). The right and left-hand propelling motors 56R and 56L are supplied through conduits 152 and 151 and 4-way valves 141B and 141A, the front and rear winch motors 113F and 113R are supplied through conduits 161 and 162 and 4-way valves 142A and 142B. The right and left-hand steering cylinders 65 are controlled by valves 69R and 69L, respectively, supplied through conduits 171 and 173. Conduits 155, 172 and 174 return to the reservoir. The valvea 142A and 142B controlling the motors 113 may be separately actuated through their controlmembers 144 and the control-members 143 of valves 141A and 141B may be connected to the same operating lever for simultaneous operation. The vehicle may be used for the transportation of hoppers 175 for liquid concrete, the discharge valves of which, Fig. 9, are independently operable and each control dispensing only a portion of the concrete carried by the hopper apparatus. Heavy beams may be carried by saddles 231 movable on rails 225 and 226 carried by the sheaves 121 and 124 (Fig. 1). A frame 275, 276, 277, Figs. 12 and 13, may be suspended from the sheaves 121, 124, and may be used to support a load from a carriage 281 which is movable longitudinally of the beam 277, that is, transversely of the vehicle, by cables 294 and 295 from a winch 291 driven by a motor 293 operated by a valve 303 (Fig. 8).