Local extraction device

Details Local extraction device Local extraction device

1984-03-09

1985-09-17

Joyce, Harold

Supports

Pipe or cable

Extending through plate

248 75, 248278, F24F 1100

Patent

active

045413274

ABSTRACT:
A device for spot or local extraction of polluted air, dust and other gases and particles from a room, comprising a flexible hose connected to a suction pipe or fan and a supporting member carrying the hose and mounted on a wall or other preferably vertical surface in the room for pivotal movement about a preferably vertical axle. For achieving great range independently of the ceiling height in the room, in which the device is to be used, the supporting member comprises a hinged supporting arm, which is pivotal about said axle, and each joint axle of which is located in parallel with said axle, and an operating arm, which by a friction joint is connected to the outer end of the supporting arm for movement about an axle perpendicular in relation to the joint axle or axles of the supporting arm.

REFERENCES:
patent: 224663 (1880-02-01), Donaldson
patent: 961552 (1910-06-01), Stouffer
patent: 1063220 (1913-06-01), Seamon
patent: 3297291 (1967-01-01), Everett

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