Abstract: A bearing includes a first bearing portion, a second bearing portion, and a connection portion. The first bearing portion assumes a generally C-like shape and opens in a first direction perpendicular to the rotational center axis. The second bearing portion assumes a generally C-like shape and opens in a second direction opposite the first direction. A gap is formed between the first and second bearing portions along the rotational center axis. The connection portion connects the first and second bearing portions at a position opposite the gap with respect to the rotational center axis.

Abstract: A screw conveyor for the transport of flowable substances and/or lumps of material comprises a rotatable first screw (1) provided with helical windings (2) arranged in a housing (3) with an inlet opening and an outlet opening. The housing (3) comprises an inlet chamber (4) and a pumping chamber (5) between said inlet and outlet openings and at least in the pumping chamber (5) a second screw (6) is provided with helical windings (7) and arranged for rotation in the opposite direction of the first screw (1), said screws (1, 6) in said pumping chamber (5) providing a positive displacement pumping function by mutual engagement between the two screws (1, 6). By having the parts of the two screws (1, 6) in mutual engagement extending a distance corresponding to at least one half winding out of the pumping chamber (5) and into the inlet chamber (4), overfilling of the pumping chamber (5) and accordingly, the subsequent increased friction in the pumping chamber (5) is avoided.

Abstract: A column and bearing assembly having a column, a shaft in the column and a guide bearing means disposed in the column to support the shaft.