Fume cupboard

Details Fume cupboard Fume cupboard

1981-05-07

1983-10-18

Makay, Albert J.

F23J 1100

Patent

active

044098901

ABSTRACT:
A fume cupboard with a ventilated enclosure having an access opening along an edge of which is a cowling for improving containment of the cupboard. The cowling is shaped such that there is a streamlined air flow over the cowling into the enclosure the cowling having a sloped portion extending into the enclosure over which the streamlined flow is divergent with respect to the main air flow into the enclosure. The cowling is positioned such that an air flow channel is defined between the cowling and the edge. The air passing through the channel into the enclosure as well as the streamlined air flow over the cowling avoid the production of eddies at the edge of the enclosure and co-operate to produce a non-turbulent air stream passing into the enclosure and opposing outward movement of eddies within the cupboard.

REFERENCES:
patent: 2702505 (1955-02-01), Nelson
patent: 3000292 (1961-09-01), Wojan
patent: 3318227 (1967-05-01), Nelson et al.
patent: 3340788 (1967-09-01), Landingham et al.
patent: 3747505 (1973-07-01), Turko
patent: 4134331 (1979-01-01), Bender
patent: 4214455 (1980-07-01), Wyden

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