Gas flow means for improving efficiency of exhaust hoods

Details Gas flow means for improving efficiency of exhaust hoods Gas flow means for improving efficiency of exhaust hoods

1991-09-11

1994-01-11

Joyce, Harold

Ventilation

Workstation ventilator

Movable

2DIG1, 454 66, 454370, B08B 1500

Patent

active

052776530

ABSTRACT:
Apparatus for inhibiting the flow of contaminants in an exhaust enclosure toward an individual located adjacent an opening into the exhaust enclosure by providing a gas flow toward a source of contaminants from a position in front of an individual to urge said contaminants away from the individual toward a gas exit port. The apparatus comprises a gas mani-fold which may be worn by a person as a vest. The manifold has a series of gas outlets on a front face thereof facing away from the individual and toward the contaminants to thereby provide a flow of gas from the front of the individual toward the contaminants.

REFERENCES:
patent: 1324834 (1919-12-01), Lumby
patent: 3113320 (1963-12-01), Cherowbrier et al.
patent: 4195363 (1980-04-01), Jenson
patent: 4558466 (1985-12-01), Kristensson
patent: 5074198 (1991-12-01), Aalto et al.
Flynn et al., "Aerodynamics and Exposure Variability", Appl. Occup. Environ. Hyg. 6(1), Jan., 1991, pp. 36-39.
George, Dennis K., et al., "The Impact of Boundary Layer Separation on Local Exhaust Design and Worker Exposure", Appl. Occup. Environ. Hyg. 5(8), Aug., 1990, pp. 501-509.

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