Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Reexamination Certificate
2010-08-26
2011-10-11
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
C138S043000, C137S625300, C251S127000
Reexamination Certificate
active
08033300
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.
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Brinson Patrick F
Fisher Controls International LLC
Hanley Flight & Zimmerman LLC
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