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:
May. 03, 2022
Filed:
Sep. 29, 2020
United Technologies Corporation, Farmington, CT (US);
Nicholas D. Leque, Vernon, CT (US);
Joseph H. Polly, Tolland, CT (US);
Raytheon Technologies Corporation, Farmington, CT (US);
Abstract
An engine includes a spool including a turbine, a second spool including a second turbine, a fan, and a fan drive gear system. A tower shaft is engaged to the spool. A second tower shaft is engaged to the second spool. A superposition gear system includes a plurality of intermediate gears engaged to the sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. The tower shaft drives the sun gear. An oil pump is driven by the carrier and supplies oil to the fan drive gear system from an oil tank through a first pickup at a first end of the oil tank and a second pickup at a second, opposite end of the oil tank. A shuttle valve at a suction side of the oil pump selectively allows oil to be supplied by one of the first and second pickup.