Abstract: A portable concrete molding machine can extrude concrete moldings of a range of widths by the provision of one or more tunnel plates within the mold, the machine being provided with respective pusher plates that have pusher faces of widths complementary to the effective widths of the mold. A pair of links connect a gearbox to the pendulum arms of the pusher means to ensure even driving force applied to the pusher plates as they undergo reciprocating movement to allow concrete to flow from a hopper through a mouth of the mold and to extrude the concrete from the mold, the machine being advanced in an extrusion direction by the extrusion of the concrete from the mold.

Abstract: An adjustable mounting assembly (80) for a machine, such as a portable concrete molding machine (10), has a plurality of base plates (81), each base plate (81) having a plurality of holes and/or slots (82) therethrough arranged in a pattern to enable a number of different motors/engines (50, 150) to be mounted thereon. Each base plate (81) has a hinge assembly (83) along one side, which releasably receives a hinge pin (84) releasably engagable in support member(s) on the machine (10) to allow quick interchange of different motors/engines (50, 150), each with a respective base plate (81).

Abstract: A portable concrete molding machine can extrude concrete moldings of a range of widths by the provision of one or more tunnel plates within the mold, the machine being provided with respective pusher plates that have pusher faces of widths complementary to the effective widths of the mold. A pair of links connect a gearbox to the pendulum arms of the pusher means to ensure even driving force applied to the pusher plates as they undergo reciprocating movement to allow concrete to flow from a hopper through a mouth of the mold and to extrude the concrete from the mold, the machine being advanced in an extrusion direction by the extrusion of the concrete from the mold.

Abstract: A stencil clip is used to apply a pattern onto an extruded concrete curb having a curved cross-sectional profile. The stencil clip is made of stiff but resiliently flexible sheet material pre-formed to match the cross-sectional profile of an upper portion of the curb, and may have at least one cut-out portion to define a decorative pattern or indicia. Alternatively, the stencil clip may be solid to serve as a blanking or masking stencil. The stencil has handle portions at its edges permitting the stencil to be clipped on and off the curb.