Abstract: A bearing chain assembly may include vertical load bearings each having a first rotation axis and configured to roll along horizontal support structure of a drive system while supporting vertical loads of a spiral conveyor belt; radial load bearings alternately coupled with the vertical load bearings and each including: a roller assembly configured to facilitate rolling of the bearing chain assembly along vertical support structure of the drive system while supporting radial loads of the spiral conveyor belt and/or the drive system. The roller assembly includes first and second roller wheels each having a rotation axis substantially perpendicular to the first rotation axis and made of a first material; a first glide bearing secured to the first roller wheel, the first glide bearing made of a second material having a lower frictional resistance than the first material; and a connection assembly for coupling the first wheel to the second wheel.

Abstract: A cassette is provided for installation in a dialysis monitor to pump a treatment solution through a dialyzer. The cassette is a unitary component with a hydraulic manifold (53) and a pneumatic manifold (54) integrated into a body (52). The body (52) has connectors for connecting the hydraulic manifold (53) to the dialyzer and the pneumatic manifold (54) to a pneumatic pressure source. A set of solution pumps is integrated in the cassette, and each solution pump includes a pump cavity inside the body. The solution pumps are operable to displace the treatment solution through the hydraulic manifold (53) to and/or from the dialyzer by action of a reciprocating gas-liquid interface in the pump cavity (30) of the respective solution pump. The gas-liquid interface is formed directly between a gaseous substance and the treatment solution.

Abstract: A cassette is provided for installation in a dialysis monitor to pump a treatment solution through a dialyzer. The cassette is a unitary component with a hydraulic manifold (53) and a pneumatic manifold (54) integrated into a body (52). The body (52) has connectors for connecting the hydraulic manifold (53) to the dialyzer and the pneumatic manifold (54) to a pneumatic pressure source. A set of solution pumps is integrated in the cassette, and each solution pump includes a pump cavity inside the body. The solution pumps are operable to displace the treatment solution through the hydraulic manifold (53) to and/or from the dialyzer by action of a reciprocating gas-liquid interface in the pump cavity (30) of the respective solution pump. The gas-liquid interface is formed directly between a gaseous substance and the treatment solution.