Gas separation: processes – Filtering
Reexamination Certificate
2007-02-26
2011-11-29
Smith, Duane (Department: 1776)
Gas separation: processes
Filtering
C055S385100, C055S385200, C055SDIG029, C362S096000, C362S253000
Reexamination Certificate
active
08066802
ABSTRACT:
The present invention relates to a method and a device for providing a zone (2) of clean air at an operation area (3) wherein an air treatment device (1) having a lighting device (25) is brought to a functional position such that the air treatment device (1) and the lighting device (25) are located above an operation area (3) and between the operation area (3) and a ceiling (32) in the operation premises (4). Air is taken into the air treatment device (1) from upper portions of the operation premises (4) and subsequently filtered in the air treatment device (1). The air is cooled in the air treatment device (1) to achieve a lower temperature than impure air (8) surrounding the zone (2) of clean air and subsequently discharged from the air treatment device (1) as a laminar air flow descending slowly downwards towards the operation area (3).
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Kristensson Dan
Kristensson Jan
Svensson Pål
Airsonett AB
Petry Marvin
Pham Minh-Chau
Smith Duane
Stites & Harbison PLLC
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