Patent · US Active

Fuselage airframe

US9623950B2 · kind B2 · utility

1Cited by

16References

15Claims

0Family size

Assignee

AIRBUS HELICOPTERS DEUTSCHLAND GMBH · DE

Inventors

Axel FINK · Donauwörth, DE
Andreas Rack · Hanau, DE
Philipp Hoefer · Donauwörth, DE

Key dates

Filing date	Feb 4, 2015
Grant date	Apr 18, 2017
Priority date	—
Expiry date	Jan 6, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/40
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A fuel tank and a differential frame in a fuselage airframe of a helicopter, the fuel tank being installed between the fuselage lower cover shell and the floor panel. The differential frame separates the fuel tank into two individual compartments, the differential frame having a web below the floor panel with a variable-height with a minimum height at the symmetry axis of the fuselage cross-section and a maximum height at lateral frame roots regions. A transversal beam is attached at each of its both ends to the differential frame bridging the entire variable-height of the differential frame and the fuel tank with two front and rear fuel bladders covering both individual tank compartments with a middle bladder installed between the transversal beam and the variable-height web of the differential frame.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.