The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Jun. 13, 2018
Rolls-royce Corporation, Indianapolis, IN (US);
Chadd D. Engel, Danville, IN (US);
Rolls-Royce Corporation, Indianapolis, IN (US);
Abstract
A gas turbine engine in a shutdown mode comprises one or more rotatable shafts, a first oil sump, a second oil sump, and an oil drainage conduit fluidically connecting the first oil sump and the second oil sump. The one or more rotatable shafts are oriented with an axis of rotation less than 90 degrees from vertical. The first oil sump has a selected critical vertical level. The second oil sump is positioned at an elevation lower than the elevation of the first oil sump. The oil drainage conduit effects oil drainage by gravity from the first oil sump to the second oil sump to prevent the level of oil collected in the first oil sump from exceeding the selected critical vertical level.