Process and device for the conveyance and measuring of medical liquids
First Claim
1. A process for the conveyance and measuring of a liquid running in a conveyance assembly (1) from at least one receiver (5) included in said conveyance assembly (1) in the direction of at least one receptacle external to the conveyance assembly (1) and vice versa, the conveyance being effected by a drive assembly (2) connected to said conveyance assembly (1) by providing a positive or negative pressure upon a gas cushion in said at least one receiver (5) above the liquid to be conveyed, wherein said conveyance assembly (1) and said drive assembly (2) are actuated by a control and signal unit (19) and said drive assembly (2) is composed of at least one cylinder (13) having a movable piston (15) and driving means (16) suitable to controllably operate the movement of said piston (15) in said cylinder (13) such that it exerts either an isobaric positive or negative pressure and wherein the volume of the liquid transported into said conveyance assembly (1) is measured in said drive assembly (2) by determining the volumina that have been covered by said piston (15) in the course of its displacements in said cylinder (13).
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Accused Products
Abstract
The invention concerns a process and a device for the combined conveyance and volume measuring of liquids. The conveyance is performed by imparting an overpressure or, respectively, a negative pressure to the liquid by means of a pressurized or depressurized gas cushion. A piston movable in a cylinder which is connected with a receiver containing the liquid exerts either a constant overpressure upon a gas cushion above the liquid to drive the liquid through a line connected with the receiver, or it exerts a constant negative pressure upon the gas cushion to draw the liquid from the line into the receiver. The transported volumes of the liquid are determined by the volumina covered by the piston in the course of its displacements in the cylinder.
121 Citations
18 Claims
- 1. A process for the conveyance and measuring of a liquid running in a conveyance assembly (1) from at least one receiver (5) included in said conveyance assembly (1) in the direction of at least one receptacle external to the conveyance assembly (1) and vice versa, the conveyance being effected by a drive assembly (2) connected to said conveyance assembly (1) by providing a positive or negative pressure upon a gas cushion in said at least one receiver (5) above the liquid to be conveyed, wherein said conveyance assembly (1) and said drive assembly (2) are actuated by a control and signal unit (19) and said drive assembly (2) is composed of at least one cylinder (13) having a movable piston (15) and driving means (16) suitable to controllably operate the movement of said piston (15) in said cylinder (13) such that it exerts either an isobaric positive or negative pressure and wherein the volume of the liquid transported into said conveyance assembly (1) is measured in said drive assembly (2) by determining the volumina that have been covered by said piston (15) in the course of its displacements in said cylinder (13).
- 2. A device for the conveyance of a liquid via a line from at least one receiver (5) in the direction of at least one receptacle or vice versa as well as for measuring the volumina of the conveyed liquids, said device comprising a drive assembly (2) connected by at least one connection line (14) to a conveyance assembly (1) and said at least one connection line 14 ends in said at least one receiver (5) that is included in said conveyance assembly (1), said drive assembly (2) including a pneumatic machine for imparting via said at least one connection line (14) a positive pressure or a negative pressure to a gas cushion in said at least one receiver (5) above the liquid to be conveyed, wherein said conveyance assembly (1) and said drive assembly (2) are connected to a control and signal unit (19), said drive assembly (2) comprising at least one cylinder (13) having a movable piston (15) that is associated with driving means (16) suitable to controllably operate the movement of said piston (15) in the cylinder (13) so as to impart a constant positive or negative pressure to a gas cushion, and said driving means (16) being associated with a measuring means for the determination of the displacement of said piston (15) in said cylinder (13) and the transported volumina.
Specification