Show case for keeping and exhibiting objects

Details Show case for keeping and exhibiting objects Show case for keeping and exhibiting objects

1989-02-17

1990-08-28

Joyce, Harold

Supports: cabinet structure

With movable components

Having biasing means

981153, 553854, 312 311, 312114, B08B 1502

Patent

active

049515551

ABSTRACT:
Show case (1) for keeping and exhibiting objects, the sides (4), the bottom (3) and the cover construction (2) of which encompass the interior of the show case more or less hermetically, wherein filter means (7) comprising preferably dust and/or gas protection filters and being accommodated in an air vent (5) clean air flowing into or being directed into said show case. When air flows in automatically due to changed pressure and temperature conditions inside and outside the show case, the show case is vented preferably through an air vent (6, 9) formed as an outlet valve. When it is impossible to seal the show case sufficiently, it will be ventilated forcibly with the least possible quantity of air by means of a pump or ventilating device connected to the interior of the show case through the filter means, which quantity of air is adapted to the air volumes flowing automatically into the show case when the air pressure increases suddenly or the temperature varies.

REFERENCES:
patent: 2639958 (1953-05-01), Stephenson
patent: 3545832 (1970-12-01), Levenback
patent: 4315579 (1982-02-01), Martin, Jr.
patent: 4660464 (1987-04-01), Tanaka
patent: 4668484 (1987-05-01), Elliott
patent: 4749241 (1988-06-01), Thoresen et al.
patent: 4804392 (1989-02-01), Spengler

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