Anti-overpressure fuel tank

Patent metadata

Field	Value
Publication number	US-10293953-B2
Application number	US-201615545090-A
Country	US
Kind code	B2
Filing date	Jan 18, 2016
Priority date	Feb 5, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

The invention relates to a tank for receiving fuel, said tank comprising a venting system comprising a flap for closing an opening made in the tank, said flap being subjected to a float and mounted in a hinged manner in the tank so as to adopt a closed position, pushed by the float when the level of fuel in the tank reaches a certain threshold, and an open, venting position, driven by the float when the level of fuel is below said threshold. According to the invention, the flap comprises a valve controlled by means that can open the valve when the flap is in a closed position and the level of fuel is below said threshold.

First claim

The invention claimed is:

1. An anti-overpressure fuel tank comprising:
a tank;
a venting system of said tank comprising:
a float mounted in a hinged manner in said tank;
a flap mechanically coupled to said float, said flap to close an opening in said tank in a closed flap position;
a valve comprising a rod mounted sliding within an orifice of said flap, said valve comprising an open valve position and a closed valve position, said rod comprising a first end with a shoulder intended to act as a stop for the closed valve position of said rod to block said orifice, and a second end with another shoulder forming a seat for a compression spring arranged around said rod and pressed against said flap to spring bias said rod in the closed valve position;

wherein the flap adopts the flap closed position, by being pushed by said float when a level of fuel in the tank reaches a certain threshold, and an open flap venting position, by being driven by the float when the level of fuel is below said certain threshold; and
wherein said tank is vented when a force exerted by an internal pressure on said valve exceeds a sum of forces exerted on said valve by an atmospheric pressure and by said compression spring, and said valve is pushed into the open valve position against said compression spring.

Assignees

• Zodiac Aerotechnics

Inventors

• Epalle Patrick
• Vacher Michel

Classifications

• B60K2015/03289

  Float valves; Floats therefor · CPC title

• B64D37/02

  Tanks (tanks constructed integrally with aircraft wings B64C3/34) · CPC title

• F16K31/22

  with the float rigidly connected to the valve · CPC title

• B64D37/32 Primary

  Safety measures not otherwise provided for, e.g. preventing explosive conditions · CPC title

• B60K15/03519

  Valve arrangements in the vent line · CPC title