Downcomer for marine vessels

Details Downcomer for marine vessels Downcomer for marine vessels

2005-08-16

2005-08-16

Avila, Stephen (Department: 3617)

Ships

Hawse pipes

C114S182000

Reexamination Certificate

active

06928942

ABSTRACT:
A downcomer for conveying wastewater from an upper level of a marine vessel to a lower level of the marine vessel includes a pair of spaced apart mounting portions and an elongate impact portion extending between the mounting portions. Each mounting portion is adapted for attachment to the marine vessel, and the shape of the elongate impact portion defines a concave space through which the wastewater is conveyed. In one preferred embodiment, a synthetic elastomeric tube, hose, or liner is placed within the concave space, and the wastewater is conveyed from the upper level of the marine vessel to the waterline through the tube, hose, or liner. In another preferred embodiment, the mounting portions and the elongate impact portion are extruded to form a unitary structure including a lightweight, rust-resistant ultrahigh molecular weight polyethylene.

REFERENCES:
patent: 5868514 (1999-02-01), Gibson
patent: 2004/0103948 (2004-06-01), Scheelen et al.
“Fluid Transport Equipment,”Encyclopedia of Fluid Mechanics, Vol. 2, Dynamics of Single-Fluid Flows and Mixing, pp. 1194, 1197, and 1200-1203.
“Reactors and Industrial Applications,”Encyclopedia of Fluid Mechanics, vol. 3, Gas-Liquid Flows; pp. 1478, 1482, and 1487.
Simon X. Xu, Lowell Pless; “Distillation tower flooding—more complex than you think: while other “predictive” methods tell too little, too late, gamma scans indicate where and why flooding occurs—invaluable insight for troubleshooters,” fromChemical Engineering, Jun. 1, 2002, ISSN: 0009-2460; vol. 109; Issue6; pp.: 8full text.
Michael W. Biddulph, Christopher P. Thomas, Alan C. Burton, “Don't Downplay Downcomer Design,” fromChemical Engineering Progress, Dec. 1993, pp. 56-60.

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