Door hinge

1. A door hinge for supporting a door to a door jamb and being operable between a closed configuration and a fully open configuration, the door hinge comprising:

a mortised body part for attaching to the door jamb, wherein the body part includes a first jamb face having a lateral extent and a second jamb face which is generally orthogonal to the first jamb face;

a mortised door part for attaching to the door, the door part including a door front face;

a pivot coupling which pivotally connects the door part to the body part, wherein the pivot coupling comprises:

a first arm which is coupled to the body part about a first fixed pivot axis and to the door part about a first displaceable pivot axis, the first fixed pivot axis being located outwardly of the first jamb face, and the first displaceable pivot axis being displaced from a first location when the hinge is in the closed configuration to a second location along and away from the first jamb face in relation to the lateral extent of the first jamb face when the hinge is in the fully open configuration; and

a second arm which is coupled to the body part about a second fixed pivot axis and to the door part about a second displaceable pivot axis, the second fixed pivot axis being located inside the body part, and the second displaceable pivot axis being displaced from a first location when the hinge is in the closed configuration to a second location along and away from the first jamb face in relation to the lateral extent of the first jamb face when the hinge is in the fully open configuration;

wherein the door front face is generally parallel to the first jamb face when the hinge is in the closed configuration and generally orthogonal to the first jamb face when the hinge is in the fully open configuration.

2. A door hinge according to claim 1 , wherein the door front face is juxtaposed outwardly and extends beyond the lateral extent of the first jamb face when the hinge is in the closed configuration.

3. A door hinge according to claim 1 , wherein the first displaceable pivot axis is displaced within the lateral extent of the first jamb face when the hinge is moved between the closed and fully open configurations.

4. A door hinge according to claim 1 , wherein the first fixed pivot axis is located outwardly of the second jamb face.

5. A door hinge according to claim 1 , wherein the second displaceable pivot axis is within the lateral extent of the first jamb face when the hinge is in the fully open configuration.

6. A door hinge according to claim 1 , wherein the second displaceable pivot axis is located beyond the lateral extent of the first jamb face when the hinge is in the closed configuration.

7. A door hinge according to claim 1 , wherein the second displaceable pivot axis is displaced further along the lateral extent of the first jamb face than is the first displaceable pivot axis when the hinge is moved from the closed configuration to the fully open configuration.

8. A door hinge according to claim 1 , wherein the first displaceable pivot axis is located outwardly of the second displaceable pivot axis from the first jamb face when the hinge is in the fully open and closed configurations.

9. A door hinge according to claim 1 , wherein the first arm includes a recess for partially receiving the second arm when the hinge is in the fully open configuration.

10. A door hinge according to claim 1 , wherein the door part includes a channel for receiving the pivot coupling when the hinge is in the closed configuration.

11. A door hinge according to claim 1 , wherein the door front face is in line with the second jamb face when the hinge is in the fully open configuration.

12. A door hinge according to claim 1 , wherein the door part includes a door end face which is generally orthogonal to the door front face, and the door end face is opposed to the first jamb face when the hinge is in the fully open configuration.

13. A door hinge according to claim 1 , wherein the second displaceable pivot axis is located outwardly of the second fixed pivot axis from the second jamb face in the closed configuration and inwardly of the second fixed pivot axis from the second jamb face in the fully open configuration.

14. A door hinge according to claim 1 , formed of metal.

15. A door hinge according to claim 1 , formed of plastics.

16. The door in combination with the door hinge according to claim 1 .