Device for drawing, holding and dispensing liquid
First Claim
1. A device for drawing, holding and dispensing a plurality of distinct liquid masses comprising:
- a reservoir plate having a first set of vertical sides surrounding a plurality of liquid reservoirs disposed in an array configuration;
a draw tube plate having a draw tube plate frame and a plurality of draw tubes disposed in and connected to said draw tube plate frame in an array configuration, said draw tube plate including a second set of vertical sides which removably mate with said first set of vertical sides of said reservoir plate such that, when mated, each of said draw tubes extends to a predetermined depth into a selected one of said liquid reservoirs for drawing liquid therefrom and dispensing liquid thereto; and
a plunger plate having a plunger plate frame which is captively received by said draw tube plate frame for sliding reciprocating motion therewith and having a plurality of plungers connected thereto and extended therefrom in an array configuration such that each of said plungers sealingly extends into a selected one of said draw tubes and such that application of an external hand pressure on an upper exterior portion of said plunger plate causes a corresponding axial stroke of said plungers, said stroke having a selectable axial length which results in the drawing and dispensing of a predetermined liquid volume.
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Accused Products
Abstract
A device for drawing, holding and dispensing a plurality of distinct, relatively low volume, liquid masses. A plunger plate with an array of plungers is received in a draw tube plate with an array of draw tubes. A piston tip is sealingly disposed in the draw tubes and the plungers are connected thereto. The draw tube plate can be received by a reservoir plate such that the draw tubes extend into an array of wells in the reservoir plate. By finger pressure the plunger plate can be reciprocated with respect to the draw tube plate to move the pistons in the draw tubes for drawing, holding and dispensing a plurality of distinct liquid masses. Preferably the pistons have an inverted concave, conical tip shape and mate with an inner, lower surface of the draw tubes.
64 Citations
16 Claims
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1. A device for drawing, holding and dispensing a plurality of distinct liquid masses comprising:
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a reservoir plate having a first set of vertical sides surrounding a plurality of liquid reservoirs disposed in an array configuration; a draw tube plate having a draw tube plate frame and a plurality of draw tubes disposed in and connected to said draw tube plate frame in an array configuration, said draw tube plate including a second set of vertical sides which removably mate with said first set of vertical sides of said reservoir plate such that, when mated, each of said draw tubes extends to a predetermined depth into a selected one of said liquid reservoirs for drawing liquid therefrom and dispensing liquid thereto; and a plunger plate having a plunger plate frame which is captively received by said draw tube plate frame for sliding reciprocating motion therewith and having a plurality of plungers connected thereto and extended therefrom in an array configuration such that each of said plungers sealingly extends into a selected one of said draw tubes and such that application of an external hand pressure on an upper exterior portion of said plunger plate causes a corresponding axial stroke of said plungers, said stroke having a selectable axial length which results in the drawing and dispensing of a predetermined liquid volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for drawing, holding and dispensing a plurality of distinct liquid masses comprising:
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a reservoir plate having a first set of vertical sides surrounding a plurality of liquid reservoirs disposed in an array configuration; a draw tube plate having a draw tube plate frame and a plurality of draw tubes disposed in and connected to said draw tube plate frame in an array configuration, said draw tube plate frame including a second set of vertical sides which detachably mate with said first set of vertical sides of said reservoir plate such that each of said draw tubes extends to a predetermined depth into a selected one of said liquid reservoirs for drawing liquid therefrom or dispensing liquid thereto; a plunger plate having a plunger plate frame disposed for reciprocating motion with respect to said draw tube plate frame and having a plurality of plungers connected thereto and extended therefrom in an array configuration such that each of said plungers extends into a selected one of said draw tubes; and a piston plate formed of an elastomeric material and comprised of; a piston plate frame which extends between said plunger plate frame and said draw tube plate frame; a plurality of pistons each connected to one of said plungers and sealingly extending in one of said draw tubes for a predetermined distance; and a plurality of spring means each resiliently connecting said piston plate frame to one of said pistons and disposed between one of said plungers and one of said draw tubes and resiliently urging said plunger plate frame away from said draw tube plate frame such that application of external hand pressure on an upper exterior portion of said plunger plate causes a corresponding axial stroke of said pistons, said stroke having a selectable axial length, which results in the drawing or dispensing of a predetermined liquid volume. - View Dependent Claims (13, 14, 15, 16)
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Specification