Check valve and method of forming a check valve

Patent metadata

Field	Value
Publication number	US-10330209-B2
Application number	US-201715416427-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Jan 26, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A check valve includes a hollow body. The hollow body includes an inlet end and an outlet end, the inlet end having a first connector and the outlet end having a second connector. A connecting projection is disposed along a length of an outer surface. A protrusion extends from the outer surface, the protrusion corresponding to a direction of fluid flow.

First claim

What is claimed is:

1. A check valve, comprising:
a hollow body, the hollow body including:
an inlet end;
an outlet end disposed opposite the inlet end, the inlet end having a first connector and the outlet end having a second connector;
connecting projections disposed along a length of an outer surface between the first connector at the inlet end and the second connector at the outlet end;
a protrusion extending from the outer surface, the protrusion corresponding to a direction of fluid flow; and
a sacrificial anode, wherein the sacrificial anode is a washer, the washer being configured to corrode at a rate faster than a spring disposed in the hollow body, and wherein the spring is formed of a first material and the washer is formed of a second material, the first material being different from the second material.

2. The check valve according to claim 1 , wherein the outlet end of the hollow body includes a valve seat on an inner surface of the hollow body.

3. The check valve according to claim 2 , further comprising a valve assembly, the valve assembly including:
a poppet disposed in the hollow body, the poppet having a first end disposed towards the inlet end, a second end disposed at the valve seat, and a poppet body extending between the first end of the poppet and the second end of the poppet;
the spring disposed in the hollow body, the spring having a first end coupled to the first end of the poppet and a second end disposed on a ledge of the inner surface of the hollow body, the spring extending coaxial to the poppet body; and
an O-ring coupled to the second end of the poppet;
wherein the spring is disposed between the first end of the poppet and the ledge of the inner surface of the hollow body, such that the O-ring and the second end of the poppet seal the hollow body at the valve seat.

4. The check valve according to claim 3 , wherein the spring is formed of a first material, and the poppet is formed of a second material, the first material being different from the second material, and wherein the poppet is configured to corrode at a rate faster than the spring.

5. The check valve according to claim 3 , wherein the O-ring is configured with respect to the valve assembly, such that the fluid flow exiting the check valve forms a quick spray against the valve seat in a self-cleaning manner.

6. The check valve according to claim 1 , wherein the first connector and the second connector are barbs, each tapered in diameter from the protrusion outward to the outlet end and inlet end.

7. The check valve according to claim 1 , wherein the connecting projections are a self-tapping screw thread.

8. The check valve according to claim 1 , wherein the protrusion is a frustoconical protrusion, the frustoconical protrusion including a first diameter disposed towards the inlet end and a second diameter disposed towards the outlet end, the first diameter being larger than the second diameter.

9. The check valve according to claim 1 , wherein the hollow body is a single piece hollow body.

10. A check valve, comprising:
a hollow body, the hollow body including:
an inlet end;
an outlet end, the inlet end having a first connector and the outlet end having a second connector, wherein the outlet end of the hollow body includes a valve seat on an inner surface of the hollow body;
connecting projections disposed along a length of an outer surface; and
a protrusion extending from the outer surface, the protrusion corresponding to a direction of fluid flow;

a valve assembly, the valve assembly including:
a poppet disposed in the hollow body, the poppet having a first end disposed towards the inlet end, a second end disposed at the valve seat, and a poppet body extending between the first end of the poppet and the second end of the poppet;
a spring disposed in the hollow body, the spring having a first end coupled to the first end of the poppet and a second end disposed on a ledge of the inner surface of the hollow body, the spring extending coaxial to the poppet body; and
an O-ring coupled to the second end of the poppet;

wherein the spring is disposed between the first end of the poppet and the ledge of the inner surface of the hollow body, such that the O-ring and the second end of the poppet seal the hollow body at the valve seat; and
a sacrificial anode, wherein the sacrificial anode is a washer, the washer being configured to corrode at a rate faster than the spring, and wherein the spring is formed of a first material and the washer is formed of a second material, the first material being different from the second material.

11. A check valve, comprising:
a single piece hollow body configured for a fluid flow from an inlet end to an outlet end, the outlet end including a valve seat on an inner surface;
a spring disposed in the single piece hollow body;
a poppet disposed in the single piece hollow body, the poppet having a first end coupled to the spring and a second end disposed at the valve seat, the poppet extending coaxial to the spring such that the poppet is held in tension by the spring;
a sacrificial anode washer disposed at an end of the spring, the sacrificial anode washer being configured to corrode at a rate faster than the spring; and
an O-ring disposed at the valve seat and coupled to the second end of the poppet;
wherein the single piece hollow body includes connecting projections disposed along a length of an outer surface;
wherein the spring is formed of a first material, and the sacrificial anode washer is formed of a second material, the first material being different from the second material.

12. The check valve according to claim 11 , further comprising a first barb at the inlet end and a second barb at the outlet end, wherein the first barb and the second barb include a tapered outer surface projection, the projection extending from the outer surface of the single piece hollow body.

13. The check valve according to claim 12 , wherein the first barb is configured to secure to tubing, and the second barb is configured to secure to tubing.

14. The check valve according to claim 11 , wherein the single piece hollow body includes a flange disposed on the outer surface, the flange having an angled surface relative to the outer surface corresponding to a direction of fluid flow from the inlet end to the outlet end of the check valve.

15. The check valve according to claim 14 , wherein the angled surface of the flange is a frustoconical shape, the frustoconical shape having a first diameter disposed towards the inlet end of the single piece hollow body, and a second diameter disposed towards the outlet end of the single piece hollow body, the first diameter being larger than the second diameter.

16. The check valve according to claim 11 , wherein in response to a pressure of the fluid flow from the inlet end to the outlet end exceeding the tension of the spring, the spring is configured to compress such that the second end of the poppet and the O-ring unseal the valve seat for the fluid flow to exit the check valve.

17. The check valve according to claim 16 , wherein the O-ring is configured with respect to a valve assembly including the poppet and the spring, such that the fluid flow exiting the check valve forms a quick spray against the valve seat in a self-cleaning manner.

18. The check valve according to claim 11 , wherein the spring has a first end coupled to the first end of the poppet, and a second end disposed on a ledge of the inner surface of the single piece hollow body.

19. A method of opera

Assignees

• Fresenius Medical Care Holdings Inc

Inventors

• Weaver Colin

Classifications

• A61M39/24

  Check- or non-return valves · CPC title

• F16K27/0209

  Check valves or pivoted valves · CPC title

• F16K15/021 Primary

  the valve member being a movable body around which the medium flows when the valve is open (F16K15/025 - F16K15/12 take precedence) · CPC title

• F16K31/1221

  one side of the piston being spring-loaded · CPC title

• F16K15/063 Primary

  the valve being loaded by a spring · CPC title