Device for exhausting gas or the like

Details Device for exhausting gas or the like Device for exhausting gas or the like

1994-09-02

1996-03-19

Joyce, Harold

Ventilation

Workstation ventilator

Movable

B08B 1504

Patent

active

054999464

ABSTRACT:
A device for exhausting gas or the like, comprises a support and at least one exhaustion tube movably mounted to the support and having a frame which is connected to the support in a manner pivotable at least in vertical direction. The frame is provided with a balancing mechanism for the exhaustion tube, said balancing mechanism comprising a cable with a draw spring. The cable is guided between support and frame such that there are formed at least two cable portions to create two force components producing an opposite variable torque around the pivot point of the frame such that the balancing torques, counteracting the gravitational torque, are produced.

REFERENCES:
patent: 3753443 (1973-08-01), Sorimachi et al.
patent: 4699046 (1987-10-01), Bellieni
patent: 4846660 (1989-07-01), Drossbach
patent: 5336130 (1994-08-01), Ray

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