Hood for the extraction of gases, vapors and suspended matter

Details Hood for the extraction of gases, vapors and suspended matter Hood for the extraction of gases, vapors and suspended matter

1983-03-03

1985-11-05

Wayner, William E.

98 36, F24F 900

Patent

active

045506507

ABSTRACT:
The hood for the extraction of gases, vapors and suspended matter comprises a hood casing, a supply air feed device and one or more suction outlets. It serves preferably as a laboratory hood. In the vicinity of the front suction inlet is provided at least one nozzle ledge for the supply air, whose outlet port is directed in the plane of the front suction inlet. At least one suction outlet is provided, which extracts in the direction of the axis of the vortex flow. According to a preferred embodiment, there are two suction outlets and two facing nozzle ledges. The nozzle ledges can have a rectangular cross-section, the front side being constructed as an outlet port. There is a constant reduction in the nozzle cross-section.

REFERENCES:
patent: 3021776 (1962-02-01), Kennedy
patent: 3023688 (1962-03-01), Kramer, Jr.
patent: 3408914 (1968-11-01), Bayern
patent: 4123967 (1978-11-01), Shanis

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