B - Operations – Transporting – 64 – D
Patent
B - Operations, Transporting
64
D
137/63
B64D 45/00 (2006.01)
Patent
CA 1277204
SHUTTLE VALVE FOR OIL TANK FILLER NECK Abstract of the Disclosure The invention relates to a shuttle valve designed to retain fluid in a pressurized system when the cap or closure of the filler neck is damaged or left off. In a preferred application, the shuttle valve of the present invention is designed to be installed in the filler neck of an oil storage tank incorporated in a turbine engine of an airplane or other high speed vehicle. The valve head comprises a piston which is disposed to move slideably and is biased by gravity, or other means, to seat in normally closed Position near the inner end of a cylindrical sleeve which is suspended coaxially from an annular flange in the mouth of the filler neck. The cylindrical sleeve has an axial length which substantially exceeds that of the piston, which in one embodiment is a hollow cylinder closed at one end. The outer side wall of the sleeve has a plurality of openings spaced-apart around its circumference, which are exposed when the valve head piston is seated at the base of the sleeve in its normally open position, and which are closed when the piston is forced toward the outer end of the sleeve in response to a pressure differential created by the breather pressure of the operating engine.
539762
Gowling Lafleur Henderson Llp
Ws Corporation
LandOfFree
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