One-step testing device

• US 5,429,804 A
• Filed: 07/15/1994
• Issued: 07/04/1995
• Est. Priority Date: 07/15/1994
• Status: Expired due to Fees

• Current Assignee: Philip W. Sayles
• Original Assignee: Philip W. Sayles
• Inventors: Sayles, Philip W.
• Primary Examiner(s): Snay, Jeffrey R.
• Application Number:
  US08/275,256
• Time in Patent Office: 354 Days
• Field of Search: 422/58, 422/61, 422/102, 422/68.1, 128/771, 604/318, 604/404
• US Class Current: 422/419
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: B01L 9/52 Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips
• CPC Class Codes: G01N 21/78 producing a change of colour

Abstract

A testing device having a lower cup for receipt of a fluid specimen and a lid containing a chamber having one or more reagent strips protruding therefrom, such reagent strips having color change testing areas thereon. The lid is attachable to the cup with the device to be inverted for the fluid specimen to reach the protruding reagent strips and for the device to be set upright for the reading of the color change testing areas through a transparent area of the lid.

Claims

1. An improved testing device having a testing mode, said device for receipt of a fluid specimen to be tested being of the type having a cup with a lid, said lid having a top, a bottom surface of said top, a top perimeter and a lid side wall, said lid able to be attached to said cup in fluid-tight relationship, comprising:

a chamber having a bottom and a side wall, said chamber side wall disposed in contact with said bottom surface of said lid top within and spaced away from said lid side wall defining a space therebetween, said space between said chamber and said lid defining a reagent strip fluid contact space, said chamber side wall having at least one notch defined therein;

said lid'"'"'s top being transparent; and

a reagent strip having a length, a first end portion and a second end portion, said reagent strip having a color change testing area disposed along its length disposed under said transparent top of said lid, said second end portion extending through said notch in said chamber side wall and into said reagent strip fluid contact space, said device in its testing mode with a fluid specimen contained within said cup and said lid attached thereto, to be inverted, causing said fluid to flow into said reagent strip fluid contact space and come in contact with said second end portion of said reagent strip and causing a change of color in said color change testing area which test result can be viewed through said transparent top of said lid.

2. The device of claim 1 further including:

a plurality of said reagent strips, each having a color change area disposed along its length, and each having a first end portion and a second end portion; and

a plurality of substantially vertical chamber divider walls arrayed within said chamber extending from said bottom surface of said lid'"'"'s transparent top to said chamber'"'"'s bottom, said chamber divider walls each having an end, said ends in contact with said chamber side wall and forming a plurality of chamber segments in conjunction with said bottom surface of said transparent top, said chamber side wall and said chamber bottom, one of said reagent strips associated with a single chamber segment, the portion of each chamber side wall between two adjacent chamber divider walls having a notch defined therein for said second end portion of one of said plurality of reagent strips to extend therethrough to said reagent strip fluid contact space.

3. The device of claim 2 wherein said chamber side wall has a top and a bottom having a perimeter, said bottom of said chamber side wall being attached to said chamber bottom and said top of said chamber side wall being affixed to said lid;

and

wherein said notches are defined at said bottom of said chamber side wall, each of said notches being shallow, flat, elongated openings corresponding in shape to said shape of said second end portion of said reagent strips, said second end portion of one of said reagent strips passing through one of said notches, filling said opening and being disposed in said reagent strip fluid contact space between said chamber side wall and said lid side wall.

4. The device of claim 3 wherein said chamber bottom extends laterally around its perimeter to form a splash shield under said second end portions of said reagent strips passing through said notches and into said reagent strip fluid contact space.

5. The device of claim 3 further including indicia imprinted on said top perimeter of said lid above each chamber segment to identify the test being done by said reagent strip in said chamber segment.

6. The device of claim 5 wherein said cup and lid are circular in cross-section and said lid, when said device is in its testing mode, being screwably attached to said cup.

7. The device of claim 5 further including an absorption pad centrally disposed within said chamber, said absorption pad in fluid communication with each of said first end portions of said reagent strips.

8. The device of claim 7 further including an absorption pad wall surrounding said absorption pad which wall has defined therein a plurality of apertures, each of said apertures receiving one of said first end portions of said reagent strips;

and

wherein said first ends of said plurality of chamber divider walls contact said absorption pad wall.