Telltale sanitary gasket

• US 6,927,058 B1
• Filed: 05/03/2004
• Issued: 08/09/2005
• Est. Priority Date: 05/03/2004
• Status: Active Grant

• Current Assignee: Garlock Sealing Technologies LLC
• Original Assignee: Rubber-Fab Incorporated
• Inventors: Dupont, Paul Robert
• Primary Examiner(s): Redding, David
• Application Number:
  US10/837,844
• Time in Patent Office: 463 Days
• Field of Search: 435/287.4, 435/288.7, 435/808, 422/58, 422/82.05, 277/317, 277/602, 277/910
• US Class Current: 435/287.4
• CPC Class Codes: A61L 2/07 Steam
• CPC Class Codes: A61L 2/206 Ethylene oxide
• CPC Class Codes: A61L 2/28 Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour apparatus involving enzymes or microorganisms C12M1/34; methods involving enzymes or microorganisms C12Q1/00
• CPC Class Codes: E03B 7/09 Component parts or accessories tools for cleaning pipes B08B9/02; devices for preventing contamination of drinking water pipes for domestic use E03C1/10; devices for preventing damage in case of bursts of pipes F16L; heating or cooling of pipes or pipe systems F16L53/00
• CPC Class Codes: F16L 23/22 made exclusively of a material other than metal
• CPC Class Codes: Y10S 277/91 O-ring seal
• CPC Class Codes: Y10S 435/808 Optical sensing apparatus

Abstract

A gasket for use with sanitary piping systems contains a receptacle for retaining an encapsulated bacterial test indicator. The receptacle has a length that permits the indicator end of the test indicator to be directly exposed to the sterilizing steam that is introduced into the piping system. The gasket is preferably installed at the sanitary flange of a short “bull” T-section of the stainless steel sanitary piping and secured thereto by a stainless steel cap. The stainless steel cap is recessed to accommodate as much of the test indicator length as may be required to position the indicator end of the test indicator in the central lumen of smaller pipe diameters.

Claims

1. A tell tale gasket for a sanitary piping system, comprising

a main body portion having an O-ring section for mating with a sanitary flange;

a centrally supported receptacle dimensioned to accommodate the minor diameter of a bacterial test indicator;

said test indicator having a larger diameter cap end and an indicator end;

ribs connecting said receptacle to said main body, said ribs permitting said steam to flow about said sanitary indicator;

said receptacle having an axial length short enough to permit said indicator end to protrude beyond the end of said receptacle, whereby steam entered into said piping system may penetrate into said indicator end.

2. In combination,

a sanitary piping T-section having at least one sanitary flange, the main diameter of said T-section being part of a sanitary piping system to which a sanitizing fluid is to be admitted;

a gasket for fitting to said sanitary pipe flange, said gasket having a centrally supported receptacle portion for snugly accommodating the minor diameter of a bacterial test indicator having a larger diameter cap end and an indicator end, said receptacle having an axial length to permit said indicator end to protrude beyond the end of said receptacle; and

a sanitary cap fitting for mating with said gasket to secure said gasket to said T-section flange, said cap being dimensioned to position said indicator end in the central portion of said T-section main diameter thereby exposing said indicator end to the main flow of said sanitizing fluid.

3. The combination of claim 2 in which said sanitizing fluid is steam.

4. A sanitary gasket, comprising,

a. an O-ring portion for mating with a sanitary flange of a piping system;

b. a retainer cup for accommodating an encapsulated bacterial test indicator; and

c. a spider portion for supporting said retainer cup in a central lumen of said piping system.

5. A sanitary gasket according to claim 4, wherein said retainer cup frictionally retains said encapsulated bacterial test indicator.

6. A sanitary gasket according to claim 5, wherein said encapsulated bacterial test indicator includes a cap, and wherein said retainer cup includes a minor diameter smaller than the diameter of said cap.

7. A sanitary gasket according to claim 5, wherein said spider portion includes passages facilitating the passage of steam toward said encapsulated bacterial test indicator.

8. A sanitary gasket according to claim 5, wherein said gasket is selected from steam-stable materials consisting of platinum silicone, EPDM and fuoroelastomer.