Check valve arrangement for a diagnostic test point

• US 6,409,146 B1
• Filed: 05/11/2000
• Issued: 06/25/2002
• Est. Priority Date: 06/25/1998
• Status: Expired due to Fees

• Current Assignee: Schroeder Industries, LLC
• Original Assignee: Schroeder Industries, Inc. (Aalberts NV)
• Inventors: Van Essen, Frederick Hubert
• Primary Examiner(s): Derakshani, Philippe
• Assistant Examiner(s): Bonderer, David A
• Application Number:
  US09/486,170
• Time in Patent Office: 775 Days
• Field of Search: 251/82, 251/149.1, 251/149.2, 251/149.4, 251/347, 251/353
• US Class Current: 251/149.1
• CPC Class Codes: F16K 15/06 with guided stems
• CPC Class Codes: F16K 31/00 Actuating devices; Operating means; Releasing devices regulating means G05D
• CPC Class Codes: F16K 31/44 Mechanical actuating means
• CPC Class Codes: F16K 51/00 Other details not peculiar to particular types of valves or cut-off apparatus
• CPC Class Codes: F16L 29/04 with a cut-off device in each of the two pipe ends, the cut-off devices being automatically opened when the coupling is applied
• CPC Class Codes: G01L 19/0007 Fluidic connecting means

Abstract

The invention provides a check valve for a test point for taking pressure measurements or fluid samples in a pressurized fluid system, said check valve including a housing having a bore and a movable valve body located in said bore, one end of said housing adapted to receive a pressure measuring probe for taking said pressure measurements or fluid samples, said one end of said housing including an upper bore section within which, in use, said pressure measuring probe is located wherein said movable valve body includes an end, located in said upper bore section, of nominal diameter less than the nominal diameter of said upper bore section. The invention further provides a check valve for a test point for taking pressure measurements or fluid samples in a pressurized fluid system, said check valve including a housing with a bore passing therethrough, a movable body located in said bore for providing opening and closing of said check valve, and a seal located on said movable valve body for providing sealing between said valve body and said bore wherein said check valve includes a collar means located or said movable valve body to support and expand sad seal. The invention also provides a test point including respective check valves.

Claims

1. A check valve for a test point for taking pressure measurements or fluid samples in a pressurised fluid system, said check valve including:

a housing with a bore passing therethrough,

a movable body located in said bore for providing opening and closing of said check valve, and

a seal located on said movable valve body for providing a sealing between said valve body and said bore,

wherein said check valve includes a collar means engaged on said movable valve body and movable thereon to support said seal.

2. The check valve in accordance with claim 1, wherein said collar provides a supporting surface for the seal and acts to ensure the seal maintains its desired shape under the effect of fluid pressure during opening and closing of the check valve.

3. A test point for taking pressure measurements or fluid samples in a pressurised fluid system. said test point comprising:

an outer housing, and

a check valve located in said outer housing, said check valve comprising;

a housing with a bore passing therethrough,

a movable body located in said bore for providing opening and closing of said check valve, and

a seal located on said movable valve body for providing sealing between said valve body and said bore,

wherein said check valve includes a collar means engaged on said movable valve body and movable thereon to support said seal.

4. The test point in accordance with claim 3, wherein said collar provides a supporting surface for the seal and acts to ensure the seal maintains its desired shape under the effect of fluid pressure during opening and closing of the check valve.