Fluid pressure reduction devices

• US 8,033,300 B2
• Filed: 08/26/2010
• Issued: 10/11/2011
• Est. Priority Date: 04/18/2006
• Status: Active Grant

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: McCarty, Michael Wildie
• Primary Examiner(s): Brinson; Patrick F
• Application Number:
  US12/869,411
• Publication Number:
  US 20100319799A1
• Time in Patent Office: 411 Days
• Field of Search: 138/42, 138/43, 138/46, 137/625.3, 137/625.37, 251/127
• US Class Current: 138/42
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths
• CPC Class Codes: Y10T 137/86734 With metering feature
• CPC Class Codes: Y10T 137/86791 Piston

Abstract

An example fluid pressure reduction device includes a plurality of nested cylinders forming a hollow structure comprising an inner surface and an outer surface. The device also includes a plurality of passageways extending between the inner and outer surfaces through the nested cylinders. At least one of the cylinders includes first apertures substantially differently shaped from second apertures in a second one of the cylinders. At least one of the first apertures has a first wetted perimeter that is greater than a second wetted perimeter of another aperture having the same area as the at least one of the first apertures.

Claims

1. A fluid pressure reduction device comprising:

a plurality of nested cylinders forming a hollow structure comprising an inner surface and an outer surface; and

a plurality of passageways extending between the inner and outer surfaces through the nested cylinders, at least one of the cylinders including first apertures substantially differently shaped from second apertures in a second one of the cylinders, and at least one of the first apertures having a first wetted perimeter that is greater than a second wetted perimeter of another one of the apertures having the same area as the at least one of the first apertures.

2. A fluid pressure reduction device as defined in claim 1, wherein the other one of the apertures is one of a circle-shaped aperture or a rectangle-shaped aperture.

3. A fluid pressure reduction device as defined in claim 1, wherein the first apertures being substantially differently shaped from the second apertures comprises the first apertures having a geometric shape different from the second apertures.

6. A fluid pressure reduction device as defined in claim 1, wherein the at least one of the cylinders including the first apertures abuts the second one of the cylinders having the second apertures.

7. A fluid pressure reduction device as defined in claim 1, wherein adjacent ones of the first apertures are in an offset configuration relative to one another.

8. A fluid pressure reduction device as defined in claim 1, wherein the first apertures are partially aligned with the second apertures.

4. A fluid pressure reduction device comprising:

a plurality of nested cylinders forming a hollow structure comprising an inner surface and an outer surface; and

a plurality of passageways extending between the inner and outer surfaces through the nested cylinders, at least one of the cylinders including first apertures substantially differently shaped from second apertures in a second one of the cylinders, and at least one of the first apertures having a first wetted perimeter that is greater than a second wetted perimeter of another aperture having the same area as the at least one of the first apertures, wherein the first apertures being substantially differently shaped from the second apertures comprises the first apertures having a polygonal shape and the second apertures having a non-polygonal shape.

9. A fluid pressure reduction device as defined in claim 4, wherein the other aperture is one of a circle-shaped aperture or a rectangle-shaped aperture.

10. A fluid pressure reduction device as defined in claim 4, wherein the at least one of the cylinders including the first apertures abuts the second one of the cylinders having the second apertures.

11. A fluid pressure reduction device as defined in claim 4, wherein adjacent ones of the first apertures are in an offset configuration relative to one another.

12. A fluid pressure reduction device as defined in claim 4, wherein the first apertures are partially aligned with the second apertures.

5. A fluid pressure reduction device comprising:

a plurality of nested cylinders forming a hollow structure comprising an inner surface and an outer surface; and

a plurality of passageways extending between the inner and outer surfaces through the nested cylinders, at least one of the cylinders including first apertures substantially differently shaped from second apertures in a second one of the cylinders, and at least one of the first apertures having a first wetted perimeter that is greater than a second wetted perimeter of another aperture having the same area as the at least one of the first apertures, wherein the first apertures are hexagonal-shaped apertures and the second apertures are rectangle-shaped apertures.

13. A fluid pressure reduction device as defined in claim 5, wherein the other aperture is one of a circle-shaped aperture or a rectangle-shaped aperture.

14. A fluid pressure reduction device as defined in claim 5, wherein the at least one of the cylinders including the first apertures abuts the second one of the cylinders having the second apertures.

15. A fluid pressure reduction device as defined in claim 5, wherein adjacent ones of the first apertures are in an offset configuration relative to one another.

16. A fluid pressure reduction device as defined in claim 5, wherein the first apertures are partially aligned with the second apertures.