Non-Circular Dialysis Coupling Prevents Inversion

The patent applies asymmetry by using non-circular cross-sectional shapes (such as D-shaped, rectangular, or irregular profiles) for the coupling bodies and sockets. This asymmetric design ensures that connections can only be made in the correct rotational orientation, preventing erroneous connections and improving operational safety. The complementary asymmetric shapes of male and female coupling parts guarantee proper alignment and sealing.

The patent transitions from conventional circular (rotationally symmetric) cross-sections to non-circular cross-sections, adding orientational constraints in the rotational dimension. This dimensional change from 2D circular symmetry to 2D non-circular asymmetry introduces a new degree of control over connection orientation, ensuring that only correct pairings can be connected while preventing mismatched connections.

The asymmetric non-circular cross-sectional design provides tactile and visual feedback that guides operators into the correct connection orientation, reducing the risk of erroneous connections. The unique shape profile ensures that only properly oriented coupling parts can be connected, thereby guaranteeing fluidic tightness while maintaining operational simplicity through intuitive alignment.

The self-aligning asymmetric coupling design allows the connection to automatically orient itself correctly during the connection process. The complementary non-circular shapes guide the coupling parts into proper alignment without requiring complex alignment procedures or additional alignment features, ensuring both fluidic tightness and ease of operation.