Hose hinge assembly

1. A hose hinge assembly for an emergency flotation system, comprising:

a first swivel fitting including a pair of elbow components rotatably coupled to each other;

a second swivel fitting including a pair of elbow components rotatably coupled to each other;

a third swivel fitting including a pair of elbow components rotatably coupled to each other;

a feed line extending into a compartment located in the interior of an aircraft body, the compartment having a compartment door;

a fill line for an emergency flotation system, the fill line connected to the compartment door;

a first rigid line; and

a second rigid line;

wherein a first end of the first swivel fitting is connected to the feed line, a second end of the first swivel fitting is connected to the first end of the first rigid line and the second swivel fitting is connected to the second end of the first rigid line, and wherein the second rigid line is connected at its first end to the second swivel fitting and is connected at its second end to a first end of the third swivel fitting, and a second end of the third swivel fitting is connected to the fill line such that the feed line, the first swivel fitting, the first rigid line, the second swivel fitting, the second rigid line, the third swivel fitting, and the fill line are connected in series and provide a fluid path from the feed line to the fill line and the fluid path remains intact when any one or more of the feed line, fill line, first rigid line and second rigid line are moved relative to each other.

2. The hose hinge assembly of claim 1 , wherein each elbow component is a 90-degree elbow component.

3. The hose hinge assembly of claim 1 , wherein an o-ring provides a fluid seal between the elbow components.

4. The hose hinge assembly of claim 1 , wherein an end piece is coupled to each elbow component.

5. The hose hinge assembly of claim 4 , wherein an o-ring provides a fluid seal between each end piece and each elbow component.

6. The hose hinge assembly of claim 4 , wherein each end piece includes a contact surface configured to abut a contact surface of a rigid line when the line is coupled to the swivel fitting.

7. The hose hinge assembly of claim 1 , wherein each rigid line is coupled to a swivel fitting with a compression nut.

8. The hose hinge assembly of claim 1 wherein the rigid lines, the compartment door and the aircraft body form a 4-bar linkage.

9. The hose hinge assembly of claim 1 wherein the feed line is coupled to the aircraft body.

10. The hose hinge assembly of claim 1 wherein the first end of the first swivel fitting is attached to an interior panel of the aircraft such that it is close to the rotational axis of the compartment door.

11. A hose hinge assembly for an emergency floatation device, comprising:

a plurality of swivel fittings, each swivel fitting including a pair of elbow components rotatably coupled to each other;

a plurality of rigid pipe sections;

a feed line extending into a compartment located in the interior of an aircraft body, the compartment having a compartment door; and

a fill line for the emergency flotation system connected to the compartment door;

wherein an inlet of a swivel fitting is coupled to the feed line, an outlet of another swivel fitting is coupled to the fill line and the rigid pipe sections extend between the swivel fittings coupled to the feed line and the fill line with at least one additional swivel fitting interposed between the rigid pipe sections such that a high-pressure fluid path is formed and the high-pressure fluid path remains intact when the compartment door is moved relative to the compartment.

12. The hose hinge assembly of claim 11 , wherein the at least one additional swivel fitting is suspended between the two swivel fittings coupled to the first and second components by the two rigid pipe sections.

13. The hose hinge assembly of claim 11 , wherein an o-ring provides a fluid seal between the elbow components.

14. The hose hinge assembly of claim 11 , wherein each rigid pipe section is coupled to a swivel fitting with a compression nut.

15. The hose hinge assembly of claim 1 wherein the rigid lines are made of stainless steel.