Patent GB-744606-A (GB)
Title: Loading and compressing material into refuse vehicle bodies and other compartments
Inventor: STARR NORBERT THOMAS
IPC: B65F3/20
Filed: 1952-11-26
Abstract: 744,606. Charging sealed refuse vehicles; compacting load. GAR WOOD INDUSTRIES, Inc. Nov. 26, 1952, No. 29932/52. Class 78 (4). Material is compacted into a compartment by a swinging panel 28, Figs. 6 and 7, which engages and pushes a retaining panel 29 but may be retracted to permit material to be loaded between the two panels. As illustrated the panel 28 swings about an axis 42 in a hopper 26 carried by a gate pivoted at the rear of a refuse collecting vehicle so that it may be swung upwardly when refuse is to be discharged by tipping. The panel 28 is operated by a pair of double-acting hydraulic rams 62, Fig. 7, each connected to the panel by a link 48 effective during the initial packing movement and by a pawl device 52 effective during the later part of the packing movement. The pawl device comprises links 52, Fig. 4, fast on a shaft 53 which joins the links 48 and carrying projections 54 which automatically engage behind shoulders 55 on the panel 28 during the compacting movement. The projections 54 are disengaged from the shoulder 55 during the return movement by a bell-crank 56, a cam 58 on which is caused by a fixed stop 61 to turn the bell-crank against the bias of a spring 64 so that the arm 63 of the bell-crank engages a stop 62 on one of the links 52 to retract the links. When the vehicle is to be loaded the panel 28 is retracted to the position shown in Fig. 6 while panel 29 is held by a hydraulic ram 67 in a position in which it retains refuse previously loaded into the body of the vehicle. After refuse has been loaded into the hopper 26 the panel 28 is allowed to fall under gravity to the position of Fig. 7 and the panel 29 is retracted about its pivot so that during the subsequent compacting movement of the panel 28 the latter panel pushes the panel 29. The panel 28 is then again retracted while the panel 29 is retained in the position of Fig. 6 ; slight lost motion in the connection 72 allows the panel 29 to relieve the compression of the refuse. The control system is partly automatic and includes interlocks to prevent the panel 28 being moved by power from the position of Fig. 6 to that of Fig. 7 and to prevent damage to the panel 29 should refuse lodge between this panel and the panel 28. The hydraulic rams 65 are controlled by a valve 73, Fig. 11, which also controls a relay valve supplying the ram 67. A hand lever 109 working in a gate 110 is connected by a linkage 116, 115, 118 to operate the valve 73 and by a link 117 to a channel section sliding member 121 the flanges of which can interfere in certain positions with a limb of a bell-crank shaped toggle 122 connected by a link 127 to an arm 128 which is engaged by stops 129, 131 on the panel 28 when the panel reaches its extreme positions. In the position of Fig. 11 in which the control lever 109 is positioned to lock the panels 28 and 29 the control lever cannot be moved to the position C to cause a powered closing of the panel 28 owing to interference between a stop 133 on the link 116 and a projection 132 carried by the panel 28. The control lever can, however, be moved to the position F which permits the panel 28 to fall under gravity. This closing motion of the panel 28 moves the projection 132 clear of the stop 133 so that the control lever 109 may be moved to the position C to cause power operation of the panel 28 to compact the refuse. When the panel 28 reaches its innermost position the projection 131 on it engages the arm 128 so that the toggle 122 is swung past its dead-centre and engages a flange 135 of the channel member 121 so, through linkage 117, 115, 116, shifting the control lever 109 to the position R in which the panel 28 is retracted by power. This motion ceases when the projection 129 engages the arm 128 to shift the control lever 109 to the position shown in which the panels are locked. If, during the packing stroke, the panel 29 is moved past its normal position a projection 136 on it engages the flange 134 of the channel member 121 to shift the control lever 109 to the position shown in which the panels are locked. U.S.A. Specification 2,212,058 is referred to.