Foldable armrest

1. A pivotable armrest comprising:

a first pivot assembly comprising a housing and a pivot plate pivotally coupled to the housing;

a second pivot assembly comprising a coupling projection extending from a circumferential surface of the pivot plate;

an armpad pivotally coupled to the coupling projection; and

the housing comprising a receptacle partially surrounding the circumferential surface of the pivot plate and shaped to limit a rotational path of the pivot plate by engaging at least one location on the circumferential surface of the pivot plate;

wherein the circumferential surface of the pivot plate comprises a straight region having a first end and a second end.

2. The pivotable armrest of claim 1 , wherein the receptacle comprises a projection that is configured to engage the first end of the straight region when the pivotable armrest is rotated into a stowed position.

3. The pivotable armrest of claim 2 , wherein the projection is configured to engage the second end of the straight region when the pivotable armrest is rotated into a deployed or semi-deployed position.

4. The pivotable armrest of claim 3 , wherein the pivot plate has an overall shape of a circle segment.

5. A pivotable armrest comprising:

a first pivot assembly comprising a housing and a pivot plate pivotally coupled to the housing;

a second pivot assembly comprising a coupling projection extending from a circumferential surface of the pivot plate;

an armpad pivotally coupled to the coupling projection; and

the housing comprising a receptacle partially surrounding the circumferential surface of the pivot plate and shaped to limit a rotational path of the pivot plate by engaging at least one location on the circumferential surface of the pivot plate;

wherein the armpad comprises a longitudinal axis arranged in an elongated direction of the armpad and a lateral axis arranged perpendicular to the longitudinal axis and extending in a plane parallel to at least one of an upper surface and a lower surface of the armpad, and

wherein the coupling projection and the longitudinal axis of the armpad are substantially vertically oriented and the lateral axis of the armpad is substantially parallel with a receptacle surface of the housing when the pivotable armrest is in a stowed position.

6. The pivotable armrest of claim 5 , wherein the coupling projection and the longitudinal axis of the armpad are substantially horizontally oriented and the lateral axis of the armpad is substantially parallel to a horizontal plane when the pivotable armrest is in a deployed position.

7. The pivotable armrest of claim 6 , wherein the coupling projection and the longitudinal axis of the armpad are substantially horizontally oriented and the lateral axis of the armpad is substantially parallel with the receptacle surface of the housing when the pivotable armrest is in a semi-deployed position.

8. The pivotable armrest of claim 1 , wherein the housing is coupled to an interior surface of a privacy shell positioned proximate a passenger seat.

9. A pivotable armrest comprising:

a first pivot assembly comprising a housing and a pivot plate, wherein the housing comprises a receptacle having a receptacle surface and the pivot plate is pivotally coupled to the housing proximate the receptacle surface;

a second pivot assembly comprising a coupling projection extending from a circumferential surface of the pivot plate;

an armpad pivotally coupled to the coupling projection, wherein the armpad comprises a longitudinal axis arranged in an elongated direction of the armpad and a lateral axis arranged perpendicular to the longitudinal axis and extending in a plane parallel to at least one of an upper surface and a lower surface of the armpad; and

wherein the coupling projection and the longitudinal axis of the armpad are substantially vertically oriented and the lateral axis of the armpad is substantially parallel with the receptacle surface of the housing when the pivotable armrest is in a stowed position;

wherein the circumferential surface of the pivot plate comprises a straight region having a first end and a second end, and the receptacle is shaped to engage the first end when the pivotable armrest is in the stowed position, and is shaped to engage the second end when the pivotable armrest is in a deployed position or a semi-deployed position.

10. The pivotable armrest of claim 9 , wherein the receptacle partially surrounds the circumferential surface of the pivot plate and is shaped to engage a location on the circumferential surface of the pivot plate when the pivotable armrest is in the stowed position.

11. The pivotable armrest of claim 10 , wherein the receptacle is shaped to engage a second location on the circumferential surface of the pivot plate when the pivotable armrest is in a deployed position or a semi-deployed position.

12. A pivotable armrest comprising:

a first pivot assembly comprising a housing and a pivot plate, wherein the housing comprises a receptacle having a receptacle surface and the pivot plate is pivotally coupled to the housing proximate the receptacle surface;

a second pivot assembly comprising a coupling projection extending from a circumferential surface of the pivot plate; and

an armpad pivotally coupled to the coupling projection, wherein the armpad comprises a longitudinal axis arranged in an elongated direction of the armpad and a lateral axis arranged perpendicular to the longitudinal axis and extending in a plane parallel to at least one of an upper surface and a lower surface of the armpad;

wherein the coupling projection and the longitudinal axis of the armpad are substantially vertically oriented and the lateral axis of the armpad is substantially parallel with the receptacle surface of the housing when the pivotable armrest is in a stowed position; and

wherein the coupling projection and the longitudinal axis of the armpad are substantially horizontally oriented and the lateral axis of the armpad is substantially parallel to a horizontal plane when the pivotable armrest is in a deployed position.

13. The pivotable armrest of claim 12 , wherein the coupling projection and the longitudinal axis of the armpad are substantially horizontally oriented and the lateral axis of the armpad is substantially parallel with the receptacle surface of the housing when the pivotable armrest is in a semi-deployed position.

14. The pivotable armrest of claim 9 , wherein the housing is coupled to an interior surface of a privacy shell positioned proximate a passenger seat.

15. A method of stowing a pivotable armrest comprising a first pivot assembly comprising a housing and a pivot plate, wherein the housing comprises a receptacle having a receptacle surface and the pivot plate is pivotally coupled to the housing, a second pivot assembly comprising a coupling projection extending from a circumferential surface of the pivot plate, and an armpad pivotally coupled to the coupling projection, wherein the armpad comprises a longitudinal axis arranged in an elongated direction of the armpad and a lateral axis perpendicular to the longitudinal axis and extending in a plane parallel to at least one of an upper surface and a lower surface of the armpad, the method comprising:

rotating the armpad relative to the coupling projection until the lateral axis of the armpad is substantially parallel to the receptacle surface of the housing;

rotating the pivot plate until the longitudinal axis of the armpad is substantially vertical; and

engaging a location on the circumferential surface of the pivot plate with at least one projection located on the receptacle, wherein the location on the circumferential surface comprises a first end of a straight region.

16. The method of claim 15 , further comprising deploying the pivotable armrest by

rotating the pivot plate until the longitudinal axis of the armpad is substantially horizontal; and

rotating the armpad relative to the coupling projection until the lateral axis of the armpad is substantially parallel to a horizontal plane.