# Patent

## Title
Aircraft interior lavatory

## Abstract

A lavatory for an aircraft cabin includes a wall having a forward wall portion disposed immediately aft of and substantially conforming to an exterior aft surface of an aircraft cabin structure, such as a passenger seat, that is substantially not flat in a vertical plane. The forward wall portion includes a forward projection over an aft portion of the adjacent passenger seat. The forward wall portion can define a secondary space in the interior lavatory space, which can provide an amenity stowage space, and can include design elements providing visual space.

## Background
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a continuation of and claims the benefit of priority from U.S. Ser. No. 14/709,409, filed May 11, 2015, which is a continuation of U.S. Ser. No. 14/043,500, filed on Oct. 1, 2013, U.S. Pat. No. 9,073,641, issue date Jul. 7, 2015, which is a continuation of U.S. Ser. No. 13/089,063, filed on Apr. 18, 2011, U.S. Pat. No. 8,590,838, issue date Nov. 26, 2013, which claims priority from Provisional Application No. 61/326,198, filed Apr. 20, 2010, and Provisional Application No. 61/346,835, filed May 20, 2010, which are incorporated by reference in their entirety herein.


BACKGROUND OF THE INVENTION
The present invention relates generally to aircraft enclosures, and more particularly relates to an aircraft cabin enclosure, such as a lavatory, an aircraft closet, or an aircraft galley, for example, including an aircraft cabin structure having an aft portion with a substantially vertically extending exterior aft surface that is substantially not flat in a vertical plane.
Aircraft lavatories, closets and other full height enclosures commonly have forward walls that are flat in a vertical plane. Structures such as passenger seats installed forward of such aircraft lavatories, closets and similar full height enclosures often have shapes that are contoured in the vertical plane. The juxtaposition of these flat walled enclosures and contoured structures renders significant volumes unusable to both the function of the flat walled lavatory or enclosure and the function of the contoured seat or other structure. Additionally, due to the lack of a provision for structural load sharing, conventional aircraft lavatories require a gap between the lavatory enclosures and adjacent structures, resulting in a further inefficiency in the use of space.
Aircraft bulkheads, typically separating passenger cabin areas or classes of passenger service, are in common use, and typically have a contour permitting passengers seated behind the bulkhead to extend their feet modestly under the premium seats immediately forward of the bulkhead. These provide a comfort advantage to passengers seated behind the bulkhead, but provide no increased efficiency in the use of space, in that they do not enable the seats fore and aft of the bulkhead to be placed more closely together. Short, floor-mounted stowage boxes, typically no taller than the bottom cushion of a passenger seat, are often positioned between the flat wall of current lavatories or other enclosures and passenger seats. These provide no improvement to the utility or spatial efficiency of the lavatory or other enclosure. While they do provide some useful stowage for miscellaneous items, they do not provide sufficient additional stowage to provide more space for passenger seating.
It would be desirable to provide an aircraft lavatory or other enclosure that can reduce or eliminate the gaps and volumes of space previously required between lavatory enclosures and adjacent structures to allow an adjacent structure such as passenger seating installed forward of the lavatory or other enclosure to be installed further aft, providing more space forward of the lavatory or enclosure for passenger seating or other features than has been possible in the prior art. Alternatively, the present invention can provide a more spacious lavatory or other enclosure with no need to move adjacent seats or other structures forward.
It would also be desirable to provide an aircraft lavatory or other enclosure with a wall to bear loads from an adjacent passenger seating or other structure, permitting elimination of a required gap between the lavatory or other enclosure and the adjacent passenger seating or other structure, making more space available for other uses. In addition, enabling a lavatory or other enclosure to bear loads from an adjacent structure can reduce the combined weight of the lavatory or other enclosure and the adjacent structure.
It also would be desirable to provide an aircraft lavatory or other enclosure that can reduce or eliminate the gaps and volumes of space previously required between lavatory enclosures and adjacent structures, to allow the installation of an increased number of passenger seats, to increase the value of the aircraft. The present invention meets these and other needs.
SUMMARY OF THE INVENTION
Briefly, and in general terms, the present invention provides for an enclosure, such as a lavatory, an aircraft closet, or an aircraft galley, for example, for a cabin of an aircraft including a structure having an aft portion with a substantially vertically extending exterior aft surface that is substantially not flat in a vertical plane. The enclosure structure permits a combination of the enclosure with the structure in a manner that permits significant saving of space in the aircraft, which in turn permits more seats to be installed, or more space to be offered per seat, increasing the value of the aircraft.
Accordingly, in one presently preferred aspect, the present invention provides for an enclosure unit for a cabin of an aircraft including an aircraft cabin structure having an aft portion with an exterior aft surface that is substantially not flat in a vertical plane. The enclosure unit can be a lavatory, an aircraft closet, or an aircraft galley, for example. In one presently preferred aspect, the enclosure unit includes one or more walls that are taller than an adjacent aircraft cabin structure, the one or more walls defining an interior enclosure space and having a forward wall portion. The forward wall portion is configured to be disposed immediately aft of and adjacent to or abutting the exterior aft surface of the aircraft cabin structure, and the forward wall portion is shaped to substantially conform to the shape of the exterior aft surface of the aircraft cabin structure.
In another presently preferred aspect, the enclosure unit includes an enclosure stall unit, and the aircraft cabin structure is a passenger seat installed immediately forward of the enclosure stall unit. In another presently preferred aspect, the forward wall portion of the enclosure unit is configured to accept loads from the aircraft passenger seat. In another presently preferred aspect, the forward wall portion includes a forward projection configured to project over an aft portion of the adjacent passenger seat immediately forward of the enclosure stall unit.
In another presently preferred aspect, the enclosure is a lavatory, including a lavatory stall unit with one or more walls having a forward wall portion. The one or more walls define an interior lavatory space, and the forward wall portion is configured to be disposed immediately aft of and adjacent to or abutting an aircraft cabin structure having an exterior aft surface having a shape that is substantially not flat in a vertical plane. In a presently preferred aspect, the forward wall portion is shaped to substantially conform to the shape of the exterior aft surface of the aircraft cabin structure.
In another presently preferred aspect, the aircraft cabin structure is a passenger seat installed immediately forward of the lavatory stall unit, and the forward wall portion of the lavatory stall unit is configured to accept loads from the passenger seat. In another presently preferred aspect, the forward wall portion includes a forward projection configured to project over an aft portion of the adjacent passenger seat immediately forward of the lavatory stall unit. In another presently preferred aspect, the forward wall portion defines a secondary space in the interior lavatory space in an area forward of an aft-most portion of the forward wall portion. The secondary space can provide an amenity stowage space inside the lavatory stall unit in the area forward of an aft-most portion of the forward wall portion, and can include design elements providing visual space inside the lavatory in the area forward of an aft-most portion of the forward wall portion.
In another presently preferred aspect, the present invention provides for an assembly of an aircraft enclosure unit and an aircraft cabin structure for an aircraft cabin, the assembly in combination including an aircraft cabin structure having an exterior aft surface having a shape that is substantially not flat in a vertical plane, and an aircraft enclosure unit including at least one wall having a forward wall portion. The one or more walls define an interior enclosure space, the forward wall portion is disposed immediately aft of and adjacent to the aircraft cabin structure, and the forward wall portion is shaped to substantially conform to the shape of the exterior aft surface of the aircraft cabin structure. In another presently preferred aspect, the aircraft cabin structure is a passenger seat installed immediately forward of the aircraft enclosure unit. In another presently preferred aspect, the forward wall portion is configured to accept loads from the aircraft passenger seat. In another presently preferred aspect, the forward wall portion includes a forward projection configured to project over an aft portion of the adjacent passenger seat immediately forward of the aircraft enclosure unit.
In another presently preferred aspect, the aircraft enclosure unit is a lavatory stall, and the one or more walls define an interior lavatory space. In another presently preferred aspect, the forward wall portion defines a secondary space in the interior lavatory space in an area forward of an aft-most portion of the forward wall portion.
In another presently preferred aspect, the present invention provides for an assembly of an aircraft lavatory unit and an aircraft cabin structure for an aircraft cabin, in which the assembly in combination includes an aircraft cabin structure having an exterior aft surface having a shape that is substantially not flat in a vertical plane, and an aircraft lavatory stall unit including one or more walls having a forward wall portion. In another presently preferred aspect, the one or more walls define an interior lavatory space, the forward wall portion is disposed immediately aft of and adjacent to the aircraft cabin structure, and the forward wall portion is shaped to substantially conform to the shape of the exterior aft surface of the aircraft cabin structure. In another presently preferred aspect, the aircraft cabin structure is a passenger seat installed immediately forward of the aircraft lavatory stall unit, and wherein the forward wall portion of the aircraft lavatory stall unit is configured to accept loads from the passenger seat. In another presently preferred aspect, the forward wall portion includes a forward projection configured to project over an aft portion of the adjacent passenger seat immediately forward of the aircraft lavatory stall unit. In another presently preferred aspect, the forward wall portion defines a secondary space in the interior lavatory space in an area forward of an aft-most portion of the forward wall portion.
These and other aspects and advantages of the invention will become apparent from the following detailed description and the accompanying drawings, which illustrate by way of example the features of the invention.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram of a prior art installation of a lavatory immediately aft of and adjacent to an aircraft passenger seat.
FIG. 2 is a schematic diagram of an installation of a lavatory according to the present invention immediately aft of and adjacent to or abutting an aircraft cabin passenger seat.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings, which are provided by way of example, and not by way of limitation, the present invention provides for an enclosure 10, such as a lavatory for a cabin 12 of an aircraft (not shown), although the enclosure may also be an aircraft closet, or an aircraft galley, or similar enclosed or structurally defined spaces, for example. As is illustrated in FIG. 2, the cabin includes a structure 14, and the enclosure may be taller than the cabin structure. The cabin structure can be a passenger seat 16, for example, installed immediately forward of the enclosure and having an aft portion 18 with and exterior aft surface 20 that is substantially not flat in a vertical plane 22. The lavatory includes a lavatory stall unit 24 having one or more walls 26 having a forward wall portion 28. The one or more walls define an interior lavatory space 30, and the forward wall portion is configured to be disposed immediately aft of and adjacent to or abutting the exterior aft surface of the aircraft cabin structure. The forward wall portion has a shape that is substantially not flat in the vertical plane, and preferably is shaped to include a recess 34 such that the forward wall portion substantially conforms to the shape of the exterior aft surface of the aircraft cabin structure. In a presently preferred aspect, the forward wall portion of the lavatory stall unit is configured to accept loads from the passenger seat. As shown in FIG. 2, the forward wall portion 28 can be configured to provide a lower recess 100 formed between the forward wall portion 28 and the cabin deck 102. As also shown in FIG. 2, the lower recess 100 can be configured to receive at least a portion of an aft-extending seat support 17 therein. As can be seen by comparing FIG. 1 and FIG. 2, the recess 34 and the lower recess 100 combine to permit the passenger seat 16 to be positioned farther aft in the cabin than would be possible if the lavatory enclosure 10 included a conventional flat and vertical forward wall without recesses like that shown in FIG. 1, or included a forward wall that did not include both recesses 34, 100.
In another presently preferred aspect, the forward wall portion defines a secondary space 36 in the interior lavatory space in an area 38 forward of an aft-most portion 40 of the forward wall portion, and the forward wall portion includes a forward projection 42 configured to project over the aft portion of the adjacent passenger seat back 44 immediately forward of the lavatory stall unit. The secondary space can include an amenity stowage space 46 inside the lavatory stall unit in the area forward of the aft-most portion of the forward wall portion, and the secondary space can include design elements providing visual space, such as a visual perception of space, inside the lavatory in the area forward of an aft-most portion of the forward wall portion.
It will be apparent from the foregoing that while particular forms of the invention have been illustrated and described, various modifications can be made without departing from the spirit and scope of the invention. Accordingly, it is not intended that the invention be limited, except as by the appended claims.

## Claims

1. An aircraft lavatory for an aircraft, the aircraft lavatory comprising:
an aft partition; and
a forward partition, including
a forward-extending upper portion,
an aft-extending mid-portion, and
a forward-extending lower portion, wherein
the forward-extending upper portion, the aft-extending mid-portion, and the forward-extending lower portion combine to define a first aft-extending recess disposed between the forward-extending upper portion and the forward-extending lower portion, wherein the first aft-extending recess is configured to receive an aft-extending seat back of a forward-positioned passenger seat therein, and
the forward partition further defines at least one second aft-extending recess proximate to a lower end of the forward partition, the at least one second aft-extending recess being configured to receive at least a portion of an aft-extending seat support of the forward-positioned passenger seat therein,

wherein the forward partition is configured to accept loads from the aft-extending seat back;

wherein the aft partition and forward partition define a lavatory space disposed therebetween.

2. The aircraft lavatory of claim 1, wherein the first aft-extending recess and the at least one second aft-extending recess permit the aft-extending seat support to be positioned further aft in a cabin area of the aircraft when compared with a position of said aft-extending seat support if said forward partition was instead substantially flat.

3. The aircraft lavatory of claim 1, wherein the first aft-extending recess substantially conforms to a contour of an aft surface of the aft-extending seat back.

4. The aircraft lavatory of claim 1, wherein the forward extending upper portion is adapted to protrude forwardly over a top of the aft-extending seat back.

5. The aircraft lavatory of claim 1, wherein the aft-extending seat back is in an upright and not a reclined position.

6. The aircraft lavatory of claim 1, wherein the first aft-extending recess extends along substantially a full width of the forward partition.

7. The aircraft lavatory of claim 1, wherein the first aft-extending recess and the at least one second aft-extending recess permit the aft-extending seat support to be positioned in a manner that reduces a volume of unusable space in a cabin area of the aircraft by reducing or eliminating gaps that would otherwise exist between a substantially flat forward partition of the aircraft lavatory and the forward-positioned passenger seat.

8. A method for reducing a volume of unusable space in a cabin area of a passenger aircraft, comprising:
replacing at least a previously-installed forward partition of a pre-existing aircraft lavatory in the cabin area of the passenger aircraft with a contoured forward partition, wherein
an outward facing vertical surface of the previously-installed forward partition is substantially flat, and
the contoured forward partition comprises
at least one first recess configured to receive at least a portion of an upwardly and aftwardly inclined seat back of a passenger seat therein, and
at least one second recess configured to receive at least a portion of an aft-extending seat support of the passenger seat therein; and


installing the passenger seat in front of the contoured forward partition;
wherein, upon installation,
the at least one first recess receives at least a portion of the upwardly and aftwardly inclined seat back, and
the second recess receives at least a portion of the aft-extending seat support,
thereby reducing the volume of unusable space in the cabin area by reducing or eliminating gaps that existed between the previously-installed forward wall and the passenger seat.

9. The method of claim 8, wherein the contoured forward partition is adapted to receive loads from the passenger seat.

10. The method of claim 8, wherein the at least one first recess substantially conforms to a contour of an aft surface of the upwardly and aftwardly inclined seat back.

11. The method of claim 8, wherein the contoured forward partition further comprises an upper projection that, upon installation, protrudes forward over a top of the upwardly and aftwardly inclined seat back.

12. The method of claim 11, wherein the upper projection is configured to abut an upper surface of the cabin area.

13. The method of claim 11, wherein the upper projection defines an interior storage space in the aircraft lavatory.

14. The method of claim 8, wherein the upwardly and aftwardly inclined seat back is in an upright and not a reclined position.

15. The method of claim 8, wherein the at least one first recess extends along substantially a full width of the contoured forward partition.

16. The method of claim 8, wherein replacing the previously-installed forward partition with the contoured forward partition permits the aft-extending seat support to be positioned farther aft in the cabin area than was possible when the previously-installed forward partition was installed in the cabin area.

17. The method of claim 8, wherein a combined weight of the contoured forward partition and passenger seat is reduced in comparison to a combined weight of the previously installed forward partition and the passenger seat.