Microanalysis device
AssigneeGyros AB
InventorsPer Andersson, Arvi Aksberg, Gunnar Ekstrand, Bjorn Berg
Life of this patent
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Abstract
Microstructure for fluids provided in a rotatable disc (D) having a U-shaped volume-defining structure (7) connected at its base to an inlet arm of a U-shaped chamber (10).
Claims9
Microstructure for fluids provided in a rotatable disc (D) characterised in that it comprises a U-shaped volume-defining structure (7, 107) comprising:
- a first arm (7a) connected at or near its upper end to an entrance port (6) wherein the lower end of said first arm (7a) is further from, or the same distance from, the centre of said disc (D) than/as, said entrance port (6);
- a second arm (7b) connected at or near its upper end to a first waste channel (8) wherein said waste channel (8) is further away from the centre of said disc (D) than said entrance port (6);
- and a base (7c) positioned further from said centre of said disc (D) than said first and second arms (7a, 7b) and which base (7c) connects the lower ends of said first and second arms (7a, 7b), wherein said base (7c) is connected to an inlet arm (10a, 110a) of a U-shaped chamber (10, 110), at or near to the upper end of said inlet arm (10a), wherein said U-shaped chamber (10, 110) further comprises;
- a base (10c, 110c) and an outlet arm (10b, 110b), wherein said base (10c, 110c) connects the lower end of said inlet arm (10a, 110a) to the lower end of said outlet arm (10b, 110b), and said outlet arm (10b, 110b) is connected at or near its upper end to a second waste outlet (11) and said base (10c, 110c) is further from, or the same distance from, the centre of said disc (D) than/as the lower ends of said inlet and outlet arms (10a, 10b;
- 110a, 110b) of said U-shaped chamber (10, 110).
Microstructure in accordance with any of the previous claims characterised in that the length of the first U-shaped volume-defining structure (7, 107) is greater than the length of the second U-shaped chamber structure (10, 110).
Microstructure in accordance with any of the previous claims characterised in that said chamber structure (10, 110) is at least partly covered by a coating (71), which can absorb energy from electromagnetic radiation which is directed onto it and thereby heat up said chamber structure (10).
Microstructure in accordance with any of the previous claims characterised in that in said chamber structure (10, 110) has sections I, II, III, IV which have different depths and which can be used to trap and release sedimenting material or other particles.
Microstructure in accordance with any of the previous claims characterised in that in said chamber structure (110) is connected by its base (110c) to a second chamber (136) positioned further from said centre of said disc (D) than said chamber structure (110) by means of a channel (134), wherein there is a hydrophobic break (132) positioned at or near the junction (130) between the chamber (110) and the channel (132).
The use of a microstructure in a rotatable disc (D) in accordance with any of the previous claims to dispense predetermined volumes of fluid to a chamber (10, 110) in said rotatable disk.
Dependencies are inferred from the claim text.