Ventilation system for the supply of air or exhaustion of fumes

Details Ventilation system for the supply of air or exhaustion of fumes Ventilation system for the supply of air or exhaustion of fumes

F - Mech Eng,Light,Heat,Weapons

24

F

98/16, 98/6

F24F 7/04 (2006.01) B66C 13/54 (2006.01) F24F 13/06 (2006.01)

Patent

CA 1091499

ABSTRACT OF THE DISCLOSURE An improved trunking system is provided for ventilation systems in which air or fumes are to be supplied to or exhausted in adverse environments from travelling equipment such as crane cabs and fume hoods in steel works and coke ovens. The trunking is of self-supporting modular construction, each module having a longitudinal opening, a row of metal strips in end to end inter- engagement extending from at least one side of said opening so as normally to close the latter, the strips being individually lo- cated against longitudinal and lateral movement relative to the opening, and 80 that the pressure differential between the trunk- ing and the ambient atmosphere tends to bias the strips to positions closing the opening. The trunking includes rails to guide a tap which travels along the trunking in sealing relation- ship thereto and has roller means locally engaging the flap or flaps to open the latter. The tap is connected to the travelling equipment so as to allow movement relative thereto except in the line of travel.

301593

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