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:
Jul. 15, 2025
Filed:
Apr. 09, 2024
Pratt & Whitney Canada Corp., Longueuil, CA;
Russell Stratton, Toronto, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
An aircraft propulsion system includes a gas turbine engine, a hydrogen-exhaust heat exchanger, and a hydrogen turboexpander. The hydrogen-exhaust heat exchanger is disposed relative to a turbine exhaust section so that a flow of exhaust gas exiting the engine is in communication with the hydrogen-exhaust heat exchanger. The hydrogen-exhaust heat exchanger changes a flow of liquid hydrogen to gaseous hydrogen. The hydrogen turboexpander has parallel first and second rotor shafts within a housing that includes a first and second rotor shaft cavities. The first rotor shaft and the first rotor shaft cavity define a first rotor shaft fluid flow path (RSFFP). The second rotor shaft and the second rotor shaft cavity define a second RSFFP. The first RSFFP is in series with the second RSFFP between an inlet port and an exit port. The exit port is in fluid communication with the combustor.