Trimodal air/fluid driven sash operator fume hood

Details Trimodal air/fluid driven sash operator fume hood Trimodal air/fluid driven sash operator fume hood

1997-05-13

1998-06-02

Joyce, Harold

Ventilation

Workstation ventilator

Covered workbench chamber

49447, B08B 1502

Patent

active

057590966

ABSTRACT:
A fume hood sash operator and fume hoods containing such sash operators. The sash operator is constructed to operate from a pressure fluid cylinder which has no outside operating parts with respect to the movement of the piston in the cylinder. The unique construction of the pressure fluid cylinder makes it very useful for fume hood construction because of the overall small dimensions of the pressure fluid cylinder and the ability to start the piston by overcoming the inertia of the piston using very low air or fluid pressures.

REFERENCES:
patent: 3820446 (1974-06-01), Granbom et al.
patent: 3934496 (1976-01-01), Turko
patent: 4150606 (1979-04-01), Nelson
patent: 4377969 (1983-03-01), Nelson
patent: 4502375 (1985-03-01), Zeigler et al.
patent: 4548128 (1985-10-01), Morikawa et al.
patent: 4774878 (1988-10-01), Berlin et al.
patent: 5148631 (1992-09-01), Bayard et al.

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