A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
98/1, 128/56
A61B 19/08 (2006.01)
Patent
CA 1055348
ABSTRACT OF THE DISCLOSURE The invention relates to diffuser drapes and has a particular application to drapes such as those used in surgical operations. Diffuser drapes have been proposed with a substantially elliptical aperture defining a work area which is surrounded by an inflatable clean air duct means integral with the drape. The clean air duct means has a diffuser therein surrounding the aperture and shaped so diffuse low velocity clean air radially through the diffuser inwardly across the aperture from opposite sides thereof to provide a resultant flow away from the aperture and upwardly and partly outwardly of the work area about the upper edges thereof. One of the prob- lems faced with this type of drape is that of manufacturing the diffuser in an economical fashion. In the present invention the diffuser comprises an upper diffuser part and a bottom diffuser part joined by a seam adjacent the periphery of the work area, the bottom diffuser part having an effective area of between approximately 50% less than and approximately 20% greater than the said work urea. The top diffuser part has an annular width of approximately 3 inches and an area sufficient to provide a class 100 clean station air flow pattern adjacent the work area.
244778
Criddle Ernest E.
Neals Pierrette L.
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