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US 5,350,338 AGranted
Vault ventilator system
OwnerRobert R. Hellman, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A system for introducing fresh air to a locked vault which is integral to the door of the vault. A fan provides motive force to the air which flows principally through passages in, or created with, existing components in the door. A food/water passage may be furnished by providing the door wheel spindle as a hollow, rather than a solid, tube.
Claims3
A vault ventilator system to provide fresh air to the inside of a vault, comprising:
- (a) means to cause said fresh air to flow into said vault;
- and
- (b) air passages defined between components of a lock mechanism installed in a door of said vault for the flow of air therethrough, wherein said air passages include a first clearance defined between at least one lock spindle and a lock spindle tube within which said at least one lock spindle is disposed.
Dependencies are inferred from the claim text.