Patent ID: 8312969
Filing Date: 2012-11-20
Classification: F01D,F01M,F05D

Abstract:
1. An aircraft engine oil system comprising: a tank having a substantially closed configuration for containing substantially an entire volume of oil therein regardless of the tank being oriented upright or inverted, the tank having in a upright orientation, a top and a bottom, and a geometrical center defined as a centroid of the tank shape, the tank configured to have an oil level surface above the geometrical center when the oil has a required minimum volume and to have the oil level surface spaced apart from the top of the tank when the oil has a required maximum volume; an oil inlet communicating with an oil pump, the inlet being located in the geometrical center of the tank and being submerged in the oil for delivery of the oil under a pressure differential between the tank to the oil system; and an oil return communicating with the tank for returning oil from the oil system back to the tank .