Fume hood with sash lock

Details Fume hood with sash lock Fume hood with sash lock

1980-09-22

1983-05-31

Makay, Albert J.

Closure fasteners

Clamps

Portable

49449, 292216, 292DIG21, 292DIG65, 312215, F23J 1100

Patent

active

043855512

ABSTRACT:
A laboratory fume hood with at least two vertically movable sashes that are operatively coupled together by a sash lock that prevents both of the sashes from being opened at the same time. Opening of one sash automatically flips a pivoted lock into locking engagement with the other sash. Thus, one of the sashes must be closed before the other can be opened. This prevents the excessive waste of heated or cooled room air being sucked out through the fume hood.

REFERENCES:
patent: 1013444 (1912-01-01), Robbins
patent: 1481878 (1924-01-01), Palmer
patent: 2274917 (1942-03-01), Carlson et al.
patent: 3025780 (1962-03-01), Russell
patent: 3401998 (1968-09-01), Evans et al.
patent: 3726206 (1973-04-01), Worick, Jr.
patent: 3941441 (1976-03-01), Scheerhorn
patent: 4249563 (1981-02-01), Shaw

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