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FITTING FOR THIN WALL STRUCTURE FOR FLUID TRANSPORT

IP.com Disclosure Number: IPCOM000240098D
Publication Date: 2014-Dec-30

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention relates to fittings that are attachable to thin wall structures for use with high pressure pneumatic and hydraulic systems in aircraft.

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    The invention relates to fittings that are attachable to thin wall structures for use with high pressure pneumatic and hydraulic systems in aircraft.

BACKGROUND

    Many aircraft systems include high pressure fluid lines for transporting gasses or liquids within pneumatic and hydraulic systems. Fittings are required to connect the lines to each other and to other volumes of fluid within the different systems. In high pressure systems, especially on aircraft, it is important that these fittings provide a tight seal to prevent any fluid leakage which could damage the system or cause a safety hazard.

    It is desirable from an efficiency standpoint to make aircraft systems as compact as possible in order to reduce the weight and volume of the system. One way to keep systems compact is to assemble components close together and use thin wall structures where possible. Thin wall structures can be used to transport gasses and liquids used within a system if they have an internal channel. Fittings can then be used to transport the fluid to other thin wall structures, standard pipes, or components within the system.

    In some cases where thin wall structures are used, there is very little room available for standard pipes and fittings previously known in the art. Standard fittings cannot be used if there is not an adequate space envelope or if there are assembly constraints. An assembly constraint not allowing for the use of a standard fitting can occur when a fitting can only protrude from one side of a structure due to other necessary parts that are too close to the other side of the structure

 

FITTING FOR THIN WALL STRUCTURE FOR FLUID TRANSPORT

TECHNICAL FIELD



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or when the order of assembly of the system requires that nothing protrudes from the fluid containing structure until after other parts are assembled around it. In some of the ladder systems it is also impossible to use a welded or brazed connector after the necessary parts are assembled due to possible distortion of other parts in the system.

    An example of a case which does not allow the use of standard pipe fittings is a lubrication system in which oil needs to be delivered via a nozzle to bearings that are too close to fit standard pipes or fittings and is assembled in a way in which welding is not permitted. Another example is a hydraulic system in which oil needs to be delivered to an actuator through a thin wall structure which sits on a rotor on one side, not allowing a fitting to protrude from that side. A third example is a lubrication system in which oil needs to be delivered to bearings that are separated from the oil line by a thin wall. The thin wall requires a fitting to allow the passage of oil through it from the pipe to the bearings, and the thin wall is assembled after the structures around it in a way that nothing can protrude from one side, as known thin wall fittings would.

    A possible solution to such problems is to make whole assemblies and sys...