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:
Feb. 21, 2023
Filed:
Jan. 14, 2021
Herbert U. Fluhler, Huntsville, AL (US);
Herbert U. Fluhler, Huntsville, AL (US);
Other;
Abstract
An annular ablative gas blocking device provides for automatic altitude compensation of a rocket engine exhaust plume. The nozzle is over expanded at low level launch altitudes and near optimally expanded at the highest altitude at the terminal burnout or staging altitude of the rocket engine. The ablative gas blocking device in the nozzle exit mitigates low altitude launch effects of an over expanded nozzle and inhibits external atmospheric air entrance into the nozzle at launch. The gas blocking means ablatively erodes away from plume impingement as the rocket ascends in a pre-programmed manner to achieve optimum area expansion ratio at all altitudes.