Moisture sealing system for aircraft servicing pit

Details Moisture sealing system for aircraft servicing pit Moisture sealing system for aircraft servicing pit

1988-04-29

1989-07-25

Chambers, A. Michael

Fluid handling

With casing, support, protector or static constructional...

Static constructional installations

52 20, 220 18, 277 3, 137557, F16L 500

Patent

active

048503894

ABSTRACT:
A subsurface pit for servicing aircraft on the ground and having walls with an opening into which a refueling conduit extends is provided with both a ground moisture seal and a pressure seal located about the moisture seal. Together the ground moisture seal and the pressure seal define a fluid tight cavity therebetween which is pressurized with air to approximately three pounds per square inch above atmospheric pressure. A pressure gauge is coupled to the pressure seal by means of a disconnectable fitting to allow pressure within the cavity between the seals to be externally monitored.

REFERENCES:
patent: 2315453 (1943-03-01), Pittman
patent: 3106099 (1963-10-01), Jeffrey et al.
patent: 3141685 (1964-07-01), Watts
patent: 4104169 (1978-08-01), Muller et al.
patent: 4269240 (1981-05-01), Cutore
patent: 4278115 (1981-07-01), Briles et al.
patent: 4295653 (1981-10-01), Coles
patent: 4659251 (1987-04-01), Petter et al.
"Bottom Fuel Hydrant Pit Assembly", Culligan & McCallum, Garden Grove, Calif., Jan. 1981.
"Two Way Shut Off", Hanson Couplings, B8-H36, Hansen Corp., Feb. 1981.

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