Device for Receiving and Dispensing Liquids
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Abstract
The invention relates to a device for receiving and dispensing liquids, the device comprising a plurality of piston-cylinder units (1, 1′, 1″) which are respectively arranged on a piston plate (2) and a cylinder plate (3). According to the invention, the liquid is received and dispensed by displacing the pistons (1′) in the cylinders (1″) by changing the distance between the plates (2, 3), perpendicularly to the plate planes, by means of a drive mechanism (6) and a plate guiding system. The volume can be determined by an upper abutment (4) and a lower abutment (5), at least one of said abutments being regulatable by a regulating means (8). The aim of the invention is to render one such device suitable for handling precise volumes of a larger number of piston-cylinder units (1, 1′, 1″) in a technically simple manner. To this end, the same receiving and dispensing volumes of the piston-cylinder units (1, 1′, 1″) are ensured with low requirements in terms of the surface parallelism of the plate planes during the movement in the plate guiding device, by structuring and arranging the abutments (4, 5) in such a way that the parallelism of the plates (2, 3) is obtained in the upper (9) and lower (10) abutment positions.
43 Citations
60 Claims
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1-30. -30. (canceled)
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31. A device for receiving and dispensing liquids, the device comprising:
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a piston plate having a plurality of pistons;
a cylinder plate defining a plurality of cylinders, wherein each piston engages one cylinder;
a drive mechanism cooperating with at least one of said piston plate and said cylinder plate to receive and dispense the liquids by changing a separation between said piston plate and said cylinder plate to displace said pistons in said cylinders;
a plate guidance to direct relative motion between said piston plate and said cylinder plate in a direction substantially perpendicular to planes of extension thereof;
an upper stop having an upper stop position;
a lower stop having a lower stop position; and
a liquid volume adjusting means cooperating with at least one of said upper stop and said lower stop to cause said piston plate and said cylinder plate to assume a mutually parallel configuration at abutment with said lower stop and said upper stop, independent of a degree to which said piston plate and said cylinder plate maintain said mutually parallel configuration at varying separations from said upper stop and said lower stop, to precisely define equal dosed liquid volumes for all pistons and cylinders. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification