Adjustable device for exhaustion and/or supply of gas

Details Adjustable device for exhaustion and/or supply of gas Adjustable device for exhaustion and/or supply of gas

1995-04-03

1996-06-18

Joyce, Harold

Ventilation

Workstation ventilator

Movable

454 65, B08B 1504

Patent

active

055272177

ABSTRACT:
An adjustable device for exhaustion and/or supply of gases and gas supported particles, the device comprising at least one exhaustion and/or supply conduit which is pivotable in at least a vertical direction, whereby at least one force-producing balancing device is provided for balancing the exhaustion and/or supply conduit. In order to provide at such an adjustable device that the balancing device generates balancing forces which correspond with the correct balancing requirement, the force-producing balancing device cooperates with a compensating device which compensates for the differences between the balancing force that the force-producing balancing device exerts on the exhaustion and/or supply conduit and the force required for balancing the exhaustion and/or supply conduit in substantially all its positions.

REFERENCES:
patent: 3820752 (1974-06-01), Oram
patent: 4682749 (1987-07-01), Strater
patent: 4699046 (1987-10-01), Bellieni
patent: 4860644 (1989-08-01), Kohl et al.

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