Method and device for simultaneously transferring plural samples

• US 5,736,105 A
• Filed: 02/09/1996
• Issued: 04/07/1998
• Est. Priority Date: 02/01/1991
• Status: Expired due to Term

• Current Assignee: Astle, Thomas W.
• Original Assignee: Astle, Thomas W.
• Inventors: Astle, Thomas W.
• Primary Examiner(s): LUDLOW, JAN M
• Application Number:
  US08/599,579
• Time in Patent Office: 788 Days
• Field of Search: 422/100, 73/864.13, 73/864.16, 73/864.17
• US Class Current: 422/509
• CPC Class Codes: B01L 3/0279 co-operating with positive ejection means
• CPC Class Codes: G01N 2035/103 using disposable tips
• CPC Class Codes: G01N 35/1065 Multiple transfer devices
• CPC Class Codes: Y10T 436/114998 with treatment or replacement of aspirator element [e.g., cleaning, etc.]
• CPC Class Codes: Y10T 436/119163 with aspirator of claimed structure
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

In a preferred embodiment, a multiple sample transfer device which includes a plurality of hollow pistons disposed in a like number of cylindrical channels and connected to a moving plate to permit simultaneous movement of the pistons. The pistons are connected to the moving plate by retaining rings adjacent the plate and above and below the plate such that the pistons are fixed to the plate in the direction of plate movement, but relatively free to move in a direction orthogonal to the direction of plate movement.

Claims

1. A device for dispensing or aspirating a plurality of liquid samples, comprising:

(a) a plurality of parallel channel means having first and second ends;

(b) a plurality of piston means having first and second ends, with said second ends of said plurality of piston means being disposed within said plurality of channel means for relative axial movement therein;

(c) a plurality of fluid sealing means disposed between said plurality of pistons means and said first ends of said plurality of channel means;

(d) a plurality of pipette tips disposed at said second ends of said plurality of channel means;

(e) a plate operatively attached to said plurality of piston means for raising or lowering said second ends of said plurality of piston means within said plurality of channel means;

(f) said plate lying in a plane orthogonal to the major axes of said plurality of piston means;

(g) each of said piston means being attached to said plate by means of first and second retainer rings adjacent, respectively, upper and lower surfaces of said plate, such that said plurality of piston means have limited free movement with respect to said plate in the direction of said raising or lowering, but have freedom of movement with respect to said plate orthogonally to said direction of said raising or lowering.