1983-08-18
1985-03-05
Joyce, Harold
49 26, 49200, F23J 1100
Patent
active
045023751
ABSTRACT:
What is disclosed is a new and novel fume hood sash operator system and a fume hood containing such a system. The sash operator is constructed to operate with a belt drive and a clutch mechanism so that the sash member can be stopped, started, moved up or down to accommodate changes in the flow or air moving through the hood structure and to provide a safe, durable, energy-saving sash operating system.
REFERENCES:
patent: 1720400 (1929-07-01), Peck
patent: 2985446 (1961-05-01), Marmont et al.
patent: 3021130 (1962-02-01), Allerdice et al.
patent: 3370381 (1968-02-01), Wetter
patent: 4150606 (1979-04-01), Nelson
Hignite Alan L.
Wendt Richard L.
Zeigler Roy F.
Zeigler Warren L.
Joyce Harold
McKellar Robert L.
Tri City Laboratory Specialists, Inc.
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