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:
Apr. 29, 1997
Filed:
Feb. 03, 1995
Ronald L Balzer, Bothell, WA (US);
Daniel T Jensen, Indianapolis, IN (US);
Michael L Sangwin, Kirkland, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
An improved pressure relief system for a turbine engine (10). The pressure relief system includes a pressure relief door (12) attached to the engine shroud (16) at its forward edge. The aft edge of the door (12) is free to pivot outward in the occurrence of a bleed duct failure. The door (12) is mounted within a cutout (26) in the engine shroud (16). The cutout (26) is sized so that the width of the forward edge of the cutout is greater than the width of the aft edge of the cutout. Opposing walls (42) on either side of the door (12) extend from the forward edge of the door at least partially to the aft edge of the door. The walls (42) extend inward approximately normal to the surface of the door (12). The walls (42) prevent hot engine gases (36) from flowing out of the sides of the cutout. Preventing hot engine gases (36) from flowing out the sides of the cutout helps to alter the air flow around the door (12) to obtain greater mixing of cool bypass air with the hot engine gases. The resulting cooler air flow decreases engine shroud (16) temperatures aft of the pressure relief door (12). The decreased temperatures on the engine shroud (16) during a bleed duct failure help to eliminate the structural requirements for high temperature materials or insulating blankets.