Abstract: A load monitoring system for a mobile work platform including a load cell having at least one strain gauge and a sensing circuit connected to receive a strain signal from the strain gauge. The sensing circuit includes a first sensing device for sensing the strain in the strain gauge, and a second sensing device for sensing a negative shift in the strain signal.

Abstract: An operator cage for a machine such as a mobile elevating work platform comprises a base unit (22) and a fence assembly (25) releasably attached to the base unit, wherein the cage (6) is constructed and arranged to be readily disassembled for convenient transportation.

Abstract: A load monitoring system (14) is provided for a mobile work platform that includes an operator platform (6), a base (2) and a lift mechanism (5) for lifting the operator platform relative to the base. The load monitoring system includes a load cell (12) for monitoring the load on the operator platform (6) and a control device (16) for controlling operation of the work platform, wherein the control device (16) is constructed and arranged to sense and monitor both static and dynamic loads on the operator platform.

Abstract: A load monitoring system for a mobile work platform including a load cell having at least one strain gauge and a sensing circuit connected to receive a strain signal from the strain gauge. The sensing circuit includes a first sensing device for sensing the strain in the strain gauge, and a second sensing device for sensing a negative shift in the strain signal.

Abstract: A load monitoring system (14) is provided for a mobile work platform that includes an operator platform (6), a base (2) and a lift mechanism (5) for lifting the operator platform relative to the base. The load monitoring system includes a load cell (12) for monitoring the load on the operator platform (6) and a control device (16) for controlling operation of the work platform, wherein the control device (16) is constructed and arranged to sense and monitor both static and dynamic loads on the operator platform.

Abstract: An operator cage for a machine such as a mobile elevating work platform comprises a base unit (22) and a fence assembly (25) releasably attached to the base unit, wherein the cage (6) is constructed and arranged to be readily disassembled for convenient transportation.

Abstract: A load monitoring system for a mobile work platform includes a load cell (12) having at least one strain gauge (16) and a sensing circuit (14) connected to receive a strain signal from the strain gauge. The sensing circuit (14) includes a first sensing device (24) for sensing the strain in the strain gauge (16), and a second sensing device (26) for sensing a negative shift in the strain signal.

Abstract: A mobile work platform includes an operator platform (6), a base (2) and a lift mechanism (4) for lifting the operator platform relative to the base. A hydraulic drive system for the mobile work platform includes an internal combustion engine (14), an electric motor (24) and a hydraulic pump (26). The internal combustion engine (14) and the electric motor (24) are constructed and arranged so as to be capable of driving the hydraulic pump (26) either separately or together.

Abstract: A base structure for a mobile access platform includes a chassis (10) having at least two pairs of wheels (12, 16a, 16b), at least a first one of the pairs of wheels (16a, 16b) including a suspension mechanism including, for each wheel, a swing arm member (18) on which the wheel is mounted, the swing arm member (18) being arranged to pivot about a substantially horizontal pivot axis, a stop member (21) arranged to engage the swing arm member (18) so as to limit upwards movement thereof, and a biassing mechanism (24) arranged to exert a biassing force on the swing arm member (18) to urge the swing arm member upwards towards the stop member (21). The biassing force is less than the force needed to maintain the swing arm member (18) in engagement with the stop member (21) when the wheel is unsupported. The arrangement is such that the swing arm members (18) normally engage the stop members (21) when the mobile access platform is standing on flat, level ground.