The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2000
Filed:
May. 12, 1998
Neil Yeoman, Merrick, NY (US);
Chang-Li Hsieh, Carlisle, MA (US);
Koch-Glitsch, Inc., Wichita, KS (US);
Abstract
A vapor-liquid contact tray (16) is provided with an upstream downcomer (46) and a downstream downcomer (48) which form a two-stage downcomer. The discharge outlet (62) of the upstream downcomer (46) feeds liquid into the downstream downcomer (48) to help seal the discharge outlet (58) of the downstream downcomer (48) against vapor entry at lower liquid flow rates and to allow positioning of the discharge outlet (58) above the height of the weir (66) on the underlying tray (16). Because the upstream downcomer (46) does not discharge liquid directly onto the underlying tray deck (40), the area of the tray deck (40) underlying the upstream downcomer (46) can contain vapor flow apertures (68) to increase the active area and mass transfer efficiency of the tray (16).