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. 08, 2008
Filed:
Jan. 31, 2005
Kevin J. Rooney, West Hills, CA (US);
Kevin J. Rooney, West Hills, CA (US);
The Boeing Company, Chicago, IL (US);
Abstract
An invention is provided for a dual mode hybrid electric thruster propulsion system. The dual mode hybrid electric thruster provides low thrust using ion/plasma exhaust only, and high thrust by mixing a neutral molecular gas with the ion/plasma exhaust. The dual mode hybrid electric thruster includes a main propellant duct defining a main propellant intake. Coupled to the main propellant duct is an accelerating element, which includes an ionization chamber and an exhaust output. In addition, a momentum exchange zone is located at the exhaust output of the accelerating element. The momentum exchange zone includes a secondary propellant duct defining a secondary propellant intake, which provides a secondary propellant into the momentum exchange zone. In high-thrust mode, the momentum exchange zone exchanges momentum between high velocity ions from the accelerating element with atoms of the secondary propellant.