Containers for goods
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United States of America Patent
Stats
-
Jan 6, 1981
Issued Date -
N/A
app pub date -
Mar 13, 1979
filing date -
Jun 14, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a container of the kind having a rigid impermeable base and a flexible impermeable cover which is sealed to the base, and in which air is evacuated from the region between the cover and the base so that the cover is drawn down onto goods on the base, there is provided a bellows-type vacuum sensor which senses the air pressure in the container and which operates switch contacts controlling a pump. When the container is used in an aircraft, where the ambient pressure inside the aircraft falls considerably when the aircraft is at high altitudes, the pump is actuated to ensure that the pressure in the container is maintained below the ambient pressure in the aircraft. An excess pressure difference, which might overload shock absorbing mounts for goods on the container base, is prevented by the bellows opening relief air ports.
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