Pipettor reservoir for particulate-containing liquids

• US 6,884,396 B2
• Filed: 03/22/2001
• Issued: 04/26/2005
• Est. Priority Date: 03/22/2001
• Status: Expired due to Fees

• Current Assignee: Thomas W. Astle
• Original Assignee: Thomas W. Astle
• Inventors: Astle, Thomas W.
• Primary Examiner(s): Warden, Jill
• Assistant Examiner(s): Gordon, Brian R.
• Application Number:
  US09/815,022
• Publication Number:
  US 20020136666A1
• Time in Patent Office: 1,496 Days
• Field of Search: 422/99, 422/100, 422/102, 422/104, 422/103
• US Class Current: 422/547
• CPC Class Codes: B01L 3/0293 for liquids
• CPC Class Codes: B01L 3/508 rigid containers not provided for above
• CPC Class Codes: B01L 9/54 Supports specially adapted for pipettes and burettes automated pipetting stations G01N35/10
• CPC Class Codes: G01N 2035/00574 Means for distributing beads

Abstract

In a preferred embodiment, a pipettor reservoir for particulate-containing liquid, including: a body portion; a shallow reservoir portion defined in an upper surface of the body portion; fluid-flow channels defined in the body portion to deliver the particulate-containing liquid from an inlet port to a plurality of openings defined in a bottom of the reservoir portion, the plurality of openings being arranged such as to agitate the particulate-containing liquid to keep particulate matter in suspension therein.

Claims

1. A pipettor reservoir for particulate-containing liquid, comprising:

(a) a body portion;

(b) a shallow, single reservoir portion defined in an upper surface of said body portion;

(c) an inlet port defined in said body portion;

(d) a plurality of openings defined in said body portion and opening into, a bottom of said single reservoir portion;

(e) fluid-flow channels including feed lines defined in said body portion to deliver said particulate-containing liquid from said inlet port to said plurality of openings in said feed lines, said plurality of openings being arranged such as to agitate said particulate-containing liquid in said single reservoir portion to keep particulate matter in suspension therein; and

f) said fluid-flow channels are sized to maintaining approximately equal flow rates sufficient to keep said particulate matter in suspension and the total cross-sectional area of said feed lines is approximately equal to the cross-sectional area of said inlet port.

2. The pipettor reservoir for particulate containing liquid, as defined in claim 1, further comprising:

a single weir overflow disposed along one side of said single reservoir portion to maintain a constant liquid level in said reservoir portion, said single weir overflow being the only weir overflow in the device.

3. The pipettor reservoir for particulate containing liquid, as defined in claim 2, wherein:

height of said single weir overflow above a bottom surface of said single reservoir portion is approximately two to five percent of length of said reservoir portion.

4. A pipettor reservoir for particulate-containing liquid, as defined in claim 1, wherein:

(a) said inlet port is connected to a main feed line header;

(b) said main feed line header has two branches, extending outwardly from where said inlet port is connected to said main feed line header;

(c) each of said two branches is connected to two feed lines;

(d) each of said two feed lines is connected to six openings defined in a bottom of said single reservoir;

(e) cross-sectional area of each of said two branches is approximately one-half cross-sectional area of said inlet port;

(f) combined cross-sectional area of said two feed lines is approximately equal to cross-sectional area of one of said two branches; and

(g) combined cross-sectional area of said six openings is approximately equal to cross-sectional area of one of said two feed lines.