Fluid pressure reduction devices

• US 7,802,592 B2
• Filed: 04/18/2006
• Issued: 09/28/2010
• 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:
  US11/405,777
• Publication Number:
  US 20070240774A1
• Time in Patent Office: 1,624 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 hollow cylinder having an inner surface and an outer surface and a plurality of passageways extending between the inner and outer surfaces. Each passageway delimits an aperture having a cross-sectional area and a wetted perimeter that is greater than a second wetted perimeter of one of a circle-shaped aperture or a rectangle-shaped aperture having the same cross-sectional area as one of the passageways.

Claims

1. A fluid pressure reduction device, comprising:

a hollow structure having an inner surface and an outer surface, wherein the hollow structure comprises a plurality of stacked disks; and

a plurality of passageways extending between the inner and outer surfaces wherein each passageway delimits an aperture having a cross-sectional area and a first wetted perimeter that is greater than a second wetted perimeter of one of a circle-shaped aperture or a rectangle-shaped aperture having the same cross-sectional area as one of the passageways.

2. A fluid pressure reduction device as defined in claim 1, wherein each of the apertures delimited by the plurality of passageways is formed adjacent one another, and wherein a first one of the apertures is at least one of substantially inverted or substantially offset relative to a second one of the apertures.

3. A fluid pressure reduction device as defined in claim 1, wherein at least one of the apertures delimited by the plurality of passageways is generally triangular, hexagonal, or dodecagonal.

4. A fluid pressure reduction device as defined in claim 1, wherein at least one of the apertures delimited by the plurality of passageways has at least one curvilinear edge or side.

5. A fluid pressure reduction device as defined in claim 1, wherein at least one of the apertures delimited by the plurality of passageways is one of generally crescent-shaped or star-shaped.

6. A fluid pressure reduction device as defined in claim 1, wherein at least two of the apertures delimited by the plurality of passageways are differently shaped.

7. A fluid pressure reduction device as defined in claim 1, wherein at least one of the apertures delimited by the plurality of passageways is associated with a valve style modifier factor value that is lower than that of a circle having the same area as the at least one of the apertures.

8. A fluid pressure reduction device as defined in claim 1, wherein the hollow structure forms a substantially circular cross-sectional shape.