Concrete placing machine with hydraulic and concrete swivel

摘要

A concrete placing machine includes a wheeled base unit and a concrete placing pipe assembly extending from the base unit. The base unit includes a lower wheeled portion and an upper swivel portion. An hydraulic swivel device is provided between an hydraulic pump at the upper swivel portion and hydraulically operated devices at the lower portion of the base unit, in order to facilitate communication of pressurized hydraulic fluid between the pump and hydraulic devices, while allowing 360 degrees of rotation of the upper swivel portion relative to the lower wheeled portion. The hydraulic swivel device further provides a passageway therethrough for a concrete connector pipe to connect the pipe assembly at the upper swivel portion to a supply pipe connected to the lower wheeled portion, whereby the upper swivel portion and the pipe assembly are also rotatable with respect to the lower wheeled portion and the supply pipe.