Patent GB-382285-A (GB)
Title: Improvements in or relating to dump vehicles
IPC: B60P1/16
Filed: 1931-07-21
Abstract: 382,285. Tipping vehicles ; bodies. TENNANT, W. J., 111, Hatton Garden, London.-(Commercial Shearing & Stamping Co. ; Youngstown, Mahoning, Ohio, U.S.A.) July 21, 1931, No. 20851. [Class 108 (i).] In a tipping vehicle adapted to be tipped to either side or to the rear the floor of the body is constructed with reinforcements and the side and end doors are adapted to be opened or shut and locked as necessary while the tipping device is mounted in a yoke adapted to swivel on trunnions in the chassis. The floor comprises a U-shaped girder 17 arranged centrally and longitudinally and transverse end U-shaped girders 22 with short intermediate channel girders 24, 24a, the whole being overlaid by and welded to a sheet metal plate 16, Fig. 7, the ends of which are bent over the girders. The body is provided with hinges or pivots at each of the four corners about which the body is arranged to tip selectively. Fig. 6 shows the hinges at the front of the vehicle. The hinges are provided with projections 11 adapted to enter cups 10 in a transverse hollow girder 8 carried by the chassis. A locking bar 14b is shown which projects into the cups 10 and is arranged by slidable movement through a lever 40 and shaft 38 to lock one or other of the hinges, both hinges being free when the locking bar is in its middle position to permit the body to be tipped to the rear. The locking bar 14b is itself locked in its adjusted position immediately tipping takes place owing to a yoke 49 entering one or other of the slots 51. The locking arrangements of the rear hinges is similar except that in its middle position the locking bar engages both hinges and releases one only on a slidable movement of the bar. The rear hinges are universally jointed. The side doors 54, Fig. 7, are hinged to the floor and are arranged to be released at the appropriate side on tipping taking place. The doors are hinged at 55 and are provided with tail pieces 56 linked by a link 57 to a lever 58 pivoted on a bracket 60 on the body. As soon as tipping commences the lever 58 which has a roller in contact with a block on the chassis permits the door to open by gravity, the door on the other side being locked in its closed position by means of a bar 70 engaging under the nose 69 of the lever 58. On resuming normal position the lever 58 is forced upwardly by the block on the chassis engaging the roller and so closes the door 54. In another form of door locking the locking bar 101, Fig. 11, is connected directly with cams 106 on the door hinges and according to the movement of the locking rod through the control rod 38a, the cams are rotated and force one of the rods 107 upwardly to withdraw the appropriate locking bolts. The rear door 79, Fig. 1, is hinged at the top and is locked at the bottom by means of a hook 83, Fig. 9, connected to a spring rod 91 by a double lever 85, 90. The hook 83 has a slot 87 engaging a pin 88 on a bracket 89 and the spring rod 91 is clamped to a lever 96 having a cam face 99. As the vehicle body is tipped to the rear this cam face 99 is pressed by a cam 100 carried by the transverse girder 7 and forces the rod 91 to the left. This moves the hook to the left and also, due to the slot 87, downwardly so releasing the door which then swings open. The tipping means comprise two hydraulic cylinders trunnioned at 128 in a yoke 126 which is itself trunnioned in the chassis. The pressure fluid is forced from the pump 120, Fig. 1, through conduits 122, 124 through the cylinder trunnions 128 to extend the multiple rams 132, 133. The width of the trunnions of the yoke are adjustable to fit different widths of chassis. The shaft 38 for selecting the tipping pivots to be released and for unlocking the doors is operated from the driver's cab by a lever 37, Fig. 1.