Fluidic coupling seal

Patent metadata

Field	Value
Publication number	US-10385995-B2
Application number	US-201314651835-A
Country	US
Kind code	B2
Filing date	Dec 16, 2013
Priority date	Dec 20, 2012
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Described is a coupling seal that includes a polymeric body having a bore extending from a first end to an internal sealing surface and a fluid channel extending from the internal sealing surface to a second end. The bore is configured to receive a tube having a fluid channel so that an endface of the tube engages the internal sealing surface. The second end of the polymeric body is configured to contact a sealing surface of a coupling body that has a fluid channel extending from the sealing surface. A fluidic seal occurs when the coupling seal is compressed between the endface and the sealing surface. A void between an outer surface of the polymeric body and an inner surface of the coupling body receives the deformation of the coupling seal while under compression to thereby prevent the fluid channel of the tube from being crushed or obstructed.

First claim

The claims are as follows:

1. A coupling seal comprising:
a polymeric body having a first end, a second end opposite to the first end, a first outer surface extending from the first end and having a cylindrical shape, and a chamfered second outer surface extending from the first outer surface to the second end, the polymeric body having a bore extending from the first end to a polymeric body internal sealing surface and having a fluid channel extending from the polymeric body internal sealing surface to the second end, the bore configured to receive a tube having a fluid channel so that an endface of the tube engages the polymeric body internal sealing surface, the second end of the polymeric body engages a coupling body internal sealing surface of a coupling body and deform and flow into an unoccupied volume when subject to compression against the coupling body internal sealing surface such that a fluidic seal is formed between the second end of the polymeric body and the coupling body internal surface when the polymeric body is under compression.

2. The coupling seal of claim 1 , wherein the second end of the polymeric body is a flat surface having an opening defined by the fluid channel.

3. The coupling seal of claim 1 wherein the polymeric body is formed of a polyimide.

4. The coupling seal of claim 1 , further comprising:
a tube having a fluid channel and an endface;
a tube sleeve disposed on the tube adjacent to the endface; and
a thrust sleeve secured to an outer surface of the tube sleeve and having a surface configured to receive a thrust surface of a compression screw and thereby subject the polymeric body to compression against the coupling body internal sealing surface.

5. The coupling seal of claim 4 , wherein the thrust sleeve includes a second surface that is configured to contact an inner surface of a conical cavity of the coupling body when the polymeric body is under compression.

6. The coupling seal of claim 5 , wherein the thrust sleeve is configured to limit insertion of the tube sleeve and the tube into the second bore of the coupling body by the second surface contacting the conical cavity.

7. A fluidic coupling comprising:
a tube having a fluid channel and an endface;
a coupling body having an outer surface, a coupling body internal sealing surface, a first bore extending from an external surface, a second bore having a smaller diameter than the first bore extending from the coupling body internal sealing surface, a conical cavity between the first and second bores, and a fluid channel extending into the coupling body from the coupling body internal sealing surface, the first bore, the second bore, and the conical cavity extending from the outer surface to the coupling body internal sealing surface; and
a coupling seal comprising a polymeric body having a first end, a second end opposite to the first end, a first outer surface extending from the first end and having a cylindrical shape, and a chamfered second outer surface extending from the first outer surface to the second end, the polymeric body having a bore extending from the first end to a polymeric body internal sealing surface and having a fluid channel extending from the polymeric body internal sealing surface to the second end, a portion of the tube being disposed in the bore of the polymeric body so that the endface is in contact with the polymeric body internal sealing surface, the polymeric body disposed in the bore of the coupling body so that the second end is in contact with the coupling body internal sealing surface, the chamfered second outer surface of the polymeric body and an internal surface of the coupling body defining a deformation volume to receive a deformation of the polymeric body when under axial compression, wherein a fluidic seal is formed between the fluid channel of the tube and the fluid channel of the coupling body when the polymeric body is under compression.

8. The fluidic coupling of claim 7 further comprising:
a tube sleeve disposed on the tube adjacent to the endface; and
a thrust sleeve secured to an outer surface of the tube sleeve and having a surface configured to receive a thrust surface of a compression screw and thereby urge the tube sleeve and tube into the at least one bore of the coupling body.

9. The fluidic coupling of claim 8 wherein the thrust sleeve is a ferrule.

10. The fluidic coupling of claim 8 wherein the thrust sleeve is a collet.

11. The fluidic coupling of claim 8 wherein the first bore of the coupling body has a threaded surface, the fluidic coupling further comprising a compression screw in engagement with the threaded surface and having a thrust surface to engage the surface of the thrust sleeve.

12. The fluidic coupling of claim 8 wherein a diameter of the second bore of the coupling body is greater than a diameter of the first outer surface of the polymeric body.

13. The fluidic coupling of claim 8 wherein an outer surface of the tube sleeve is tapered at an end proximate to the endface of the tube.

14. The fluidic coupling of claim 8 , wherein a second surface of the thrust sleeve contacts an inner surface of the conical cavity when the polymeric body is under compression.

15. The fluidic coupling of claim 14 , wherein contact between the second surface and the conical cavity is configured to limit insertion of the tube sleeve and the tube into the second bore of the coupling body.

16. The fluidic coupling of claim 15 , wherein the first outer surface of the polymeric body is adjacent to the second bore of the coupling body when the polymeric body is under compression.

17. The fluidic coupling of claim 7 , wherein the second end of the polymeric body is a flat surface having an opening defined by the fluid channel.

Assignees

• Waters Technologies Corp

Inventors

• Cormier Sylvain
• Shreve Joshua A
• Luongo Joseph A
• Keenan Paul
• Plant Kenneth

Classifications

• G01N30/22

  in high pressure liquid systems · CPC title

• F16L19/02 Primary

  Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member · CPC title

• G01N30/6026 Primary

  Fluid seals · CPC title

• F16L19/0212 Primary

  using specially adapted sealing means · CPC title

• F16L19/0206

  the collar not being integral with the pipe · CPC title