AIRCRAFT ONE-PIECE FUEL NONRETURN DEVICE AND METHOD FOR MANUFACTURING SUCH A DEVICE
The invention relates to a fluid nonreturn device ( 1 ) comprising a body ( 2 ) defining a chamber ( 5 ) intended to receive a fluid and having at least one opening ( 3 ), the chamber ( 5 ) has an internal wall ( 6 ) extended by an elastic return member ( 8 ) which forms an integral part of said internal wall ( 6 ), said elastic return member ( 8 ) is extended by a valve shutter ( 9 ) forming an integral part of said elastic return member ( 8 ), the elastic return member ( 8 ) pushes the valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fluid in the chamber ( 5 ) from leaving via the opening ( 3 ).
1 . A fuel nonreturn device ( 1 ) comprising a body ( 2 ) defining a chamber ( 5 ) intended for receiving a fuel and having at least one opening ( 3 ), the chamber ( 5 ) has an internal wall ( 6 ) extended by an elastic return member ( 8 ) which forms an integral part of said internal wall ( 6 ), said elastic return member ( 8 ) is extended by a valve shutter ( 9 ) forming an integral part with said elastic return member ( 8 ), the elastic return member ( 8 ) pushes the valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
2 . The device ( 1 ) according to claim 1 , characterized in that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) are made of plastic material.
3 . The device ( 1 ) according to claim 1 , characterized in that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) are made of metal.
4 . The device ( 1 ) according to claim 1 , characterized in that the elastic return member ( 8 ) is a helical compression spring.
5 . The device ( 1 ) according to claim 1 , characterized in that the elastic return member ( 8 ) is a leaf spring.
6 . The device ( 1 ) according to claim 1 , characterized in that a seal is placed in a seat ( 12 ) arranged around the opening ( 3 ) or around the valve shutter ( 9 ) to ensure a tight seal between the valve shutter ( 9 ) and the body ( 2 ).
7 . The device ( 1 ) according to claim 1 , characterized in that the opening has a sloping peripheral wall ( 6 ), and the valve shutter ( 9 ) has a complementary sloping rim.
8 . The device ( 1 ) according to claim 7 , characterized in that the sloping rim of the valve shutter ( 9 ) has a peripheral annular groove forming the seat ( 12 ) of a seal.
9 . The device ( 1 ) according to claim 1 , characterized in that the body ( 2 ) has a tubular conformation defining a chamber ( 5 ) between a downstream opening ( 4 ) and an upstream opening ( 3 ), the elastic return member ( 8 ) extending the internal wall ( 6 ) of the chamber ( 5 ) from the downstream opening ( 4 ) and extends so that the valve shutter ( 9 ) closes off the upstream opening ( 3 ).
10 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 1 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
11 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 2 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
12 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 3 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
13 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 4 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
14 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 5 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
15 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 6 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
16 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 7 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
17 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 8 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).
18 . A method for manufacturing a fuel nonreturn device ( 1 ) according to claim 9 , characterized in that it consists of manufacturing, layer by layer and by additive manufacturing, the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ), so that the body ( 2 ), the elastic return member ( 8 ) and the valve shutter ( 9 ) together form a single one-piece part, the device ( 1 ) being manufactured so that:
the body ( 2 ) defines a chamber ( 5 ) intended for receiving a fuel, and has at least one opening ( 3 );
the chamber ( 5 ) has an internal wall ( 6 ) extended by the elastic return member ( 8 );
the elastic return member is extended by the valve shutter ( 9 ) and pushes said valve shutter ( 9 ) into a position in which it closes off the opening ( 3 ) so as to prevent the fuel present in the chamber ( 5 ) from leaving via the opening ( 3 ).