Portable pneumatic aircraft fuel tank air eductor

Details Portable pneumatic aircraft fuel tank air eductor Portable pneumatic aircraft fuel tank air eductor

1991-06-03

1993-04-06

Brown, David H.

Pumps

One fluid pumped by contact or entrainment with another

Jet

417172, F04F 500

Patent

active

H00011592

ABSTRACT:
A spark-free portable air eductor for purging fumes from aircraft fuel ta that have contained a low vapor pressure liquid. A conical tube passes through an access opening in the tank to be purged. The conical tube has its larger diameter opening residing within the tank and its smaller diameter residing outside the tank. A jet introduces a low pressure air flow into the conical tube along its longitudinal axis. The jet is located at the smaller diameter opening of the conical tube. A cylindrical tube is connected to the smaller diameter opening of the conical tube. As low pressure air exits the jet, a vacuum is created at the larger diameter opening of the conical tube thereby causing a large volume of air to pass through the tank, thus purging an aircraft fuel tank without use of electric power. The large volume of air moving through the tank reduces the time required for the tank to be purged of all fumes.

REFERENCES:
patent: 1233941 (1917-07-01), Welsh
patent: 2350401 (1944-06-01), Kneass, Jr.
patent: 3625820 (1971-12-01), Gluntz et al.
patent: 4134547 (1979-01-01), Gamst
patent: 4940392 (1990-07-01), Adkins
patent: 5024583 (1991-06-01), Sasaki et al.

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