Device for portioning and titrating liquid samples

Claim 1

A device according to claim 1, further comprising a member (reagent block) having channels adapted to receive determined volumes of different reagents or dilution liquids (reagent channels) and adapted to communicate individually with the portion channels, when the portioning member and the transfer member are in their second relative position.

Claim 7

A device for portioning a liquid sample into several portions of respectively determined volumes and for permitting their possible dilution and titration, said device comprising: a portioning member in the form of one circular plate traversed from one face to the other face by portion channels having determined volumes, a transfer member in the form of two coaxial circular plates, namely a lower plate and an upper plate, in slidable contact with the portioning member on the two opposite faces thereof, said transfer member comprising an inlet and an outlet formed in at least one of said plates, in a surface thereof other than said surface of contact, a series of transfer grooves in its surfaces of contact with the portioning member in position such that they put said portion channels in communication with each other and said inlet and outlet respectively to form a continuous path for said liquid sample for a first angular relative position of said portioning member and of said transfer member, and a series of delivery channels, including individual outlets, in positions such that they communicate individually with said portion channels in a second angular relative position of said portioning member and of said transfer member, a reagent block in the form of a circular plate traversed from one face to the other face by a series of reagent channels of determined volumes and a series of supply channels, normally isolated from said reagent channels, and a filling block in the form of two coaxial circular plates, namely a lower plate and an upper plate, in slidable contact with the reagent block on the two opposite faces thereof, said filling block comprising series of inlets and outlets formed on one of said plates in a surface thereof other than its surface of contact, a series of communication channels in positions such that they put the supply channels in communication individually with the reagent channels and said inlets and outlets for a first angular relative position of said reagent block and of said filling block, and a series of emptying channels in positions such that they permit the emptying of the reagent channels for a second angular relative position of said reagent block and of said filling block, and conduit means connecting said emptying channels to said delivery channels.

Claim 13

A device for portioning a liquid sample into several portions of respectively dEtermined volumes, and for permitting their dilution or titration, said device comprising a first member and at least one second member comprising surfaces of contact adapted to slide on one another so as to permit relative movement of one of these members with respect to the other, between a first relative position and a second relative position, the first member (portioning member) comprising a series of channels (portion channels) opening at its surfaces of contact and each having a determined volume, the second member (transfer member) comprising an inlet and an outlet in at least one of its surfaces other than its said surface of contact, a first series of channels (transfer channels) in positions such that they put the portion channels in communication with one another and with said inlet and outlet in said first relative position to form a continuous path for said liquid sample, and a second series of channels (delivery channels), including individual outlets, in position such that they communicate individually with the portion channels in said second relative position; a third member (reagent block) and a fourth member (filling block) having surfaces of contact permitting relative displacement of these blocks one with respect to the other, between said first relative position and second relative position, said reagent block comprising a series of channels of respective determined volumes (reagent channels) and a series of supply channels, normally isolated from the reagent channels, said filling block comprising series of inlets and outlets in at least one of its surfaces other than its corresponding surface of contact, a first series of channels (communication channels) in positions such that the supply channels are put in communication individually with the reagent channels and the said inlets and outlets for said first relative position of the two blocks, and a second series of channels (emptying channels) in positions such that they permit the emptying of the reagent channels, for said second relative position of the two blocks, and conduit means connecting said emptying channels to said delivery channels.