Fume hood
AssigneeE. H. Sheldon and Company
InventorArthur W. Carlson
Life of this patent
Estimating the term…
Abstract
A fume hood includes a polygonal-shaped work top providing three or more equally-spaced work areas. A tubular column with a lower apertured portion is located at the center of the work top for exhausting heavier-than-air gases. A plenum located above the work top and supported by the tubular column is provided with slots located above the work openings for collecting and exhausting lighter-than-air gases. Transparent viewing screens permit inspection of all work locations from a single vantage point. A central pedestal is used to support the hood and to route plumbing and electrical conduits from the floor. The system is easily convertible between up-draft and down-draft exhaust without the need for special baffles.
Claims8
A fume hood comprising:
- a base having a polygonal horizontal cross section including edges which are alternately relatively long and relatively short, the longer edges defining work areas;
- a work top on said base;
- a central hollow pedestal adapted for mounting on a floor and carrying said base;
- a central tubular column extending upwardly of said base and defining a lower apertured region for intake of gases;
- a plenum above said base and defining the top of said fume hood, said plenum providing intake apertures above said work areas;
- transparent viewing screens extending between the relatively shorter edges of said base and said plenum to separate said work areas;
- and exhaust conduit means for exhausting gases collected from within said hood by said tubular column and by said plenum.
A fume hood comprising:
- a hollow pedestal adapted to be located on a floor;
- a base shell mounted to said pedestal and having an upper horizontal hexagonal cross section with alternate relatively long and relatively short sides, said relatively long sides providing work areas;
- a top mounted to said base and conforming to the shape thereof;
- a central tubular column extending upwardly from said top and defining lower apertures for collecting heavier-than-air gases within said hood;
- a plenum mounted to the top of said tubular column and carried thereby, said plenum defining input apertures located above said work areas for collecting lighter-than-air gases within said hood, said plenum having the same cross sectional shape as the top of said base and in register therewith;
- a transparent viewing screen extending between each of the shorter sides of said base and said plenum;
- transparent eye-screens above each of said work areas and including a baffle movable between a lowered position and a raised position;
- and exhaust conduit means for exhausting gases collected in said plenum and said tubular column.
Dependencies are inferred from the claim text.