Patent ID: 7837378
Filing Date: 2010-11-23
Classification: B28B,B29C,E04G

Abstract:
1. A mixer-extruder assembly for mixing powdered concrete with a fluid and forcibly extruding the mixture therefrom comprising: a mixing chamber having an inlet end and an opposing outlet end; a powdered concrete inlet port configured to inject powdered concrete into the mixing chamber at a location that is near the inlet end; a fluid inlet port configured to inject fluid into the mixing chamber at a location that is near the inlet end; a mixture outlet port configured to extrude a mixture of powdered concrete and fluid from within the mixing chamber at a location that is near the outlet end; at least one mixing blade configured to effectively mix the powdered concrete with the fluid by rotating within the mixing chamber about a rotational axis, the at least one mixing blade being substantially straight and extending longitudinally substantially between the inlet and the outlet ends of the mixing chamber; a piston configured to controllably extrude the mixture of powdered concrete and fluid from within the mixing chamber through the outlet port by moving longitudinally along the rotational axis between the inlet and the outlet ends of the mixing chamber, the piston having: a drive shaft configured when rotated to cause the at least one mixing blade to rotate and when translated to cause the piston to move substantially between the inlet and the outlet ends of the chamber, whereby the mixing blade, the piston, and the drive shaft are configured such that the mixture is mixed by the mixing blade and extruded by the piston simultaneously.