Dual action inlet door and method for use thereof

US7210652B2 · kind B2 · utility

Assignee

• HONEYWELL INTERNATIONAL INC. · US

Inventors

• Jeffrey M. Hein · Tempe, US
• Nicholas Williams · Phoenix, US
• Yogendra Yogi Sheoran · Scottsdale, US
• Cecilia Lam · Scottsdale, US
• Ora Morency Cowans · Los Angeles, US
• Benjamen Kurt Higuera · Oracle, US
• Andrew Peduchi · Tucson, US
• Ravisha Pramod Sellahewa · Los Gatos, US
• Daniel Brown · Surprise, US

Key dates

• Filing date: Dec 8, 2005
• Grant date: May 1, 2007
• Expiry date: Dec 8, 2025

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2260/96
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An inlet door assembly and method for reducing noise from an auxiliary power unit (APU) contained within an aircraft housing is provided. The inlet assembly includes an inlet duct, an actuator, and a door. The inlet duct is configured to extend from the auxiliary power unit to the aircraft housing and has a sidewall that defines a flow passage through which APU noise propagates. The actuator is disposed at least partially within the inlet duct. The door coupled to the actuator. The actuator is also configured to selectively rotate the door between at least a first position, in which at least a portion of the door deflects APU noise in a first direction, and a second position, in which at least a portion of the door deflects the APU noise in a second direction.