Separation device for a spacecraft

1. A separation device for a spacecraft or launcher, the separation device being movable from a locked state, in which the separation device is arranged to lock onto a component of said spacecraft or launcher, to a released state, in which said component is released, said separation device comprising:

an inner housing divided into at least two portions for locking onto said component of said spacecraft or launcher,

a locking arrangement arranged to move between a locking configuration and a releasing configuration, wherein the locking configuration is such that said at least two portions of said inner housing are prevented from separating, and

at least one initiator that provides high pressure fluid to an expansion chamber when the separation device is moved from the locked state to the released state, wherein the high pressure fluid in said expansion chamber moves the locking arrangement from the locking configuration to the releasing configuration;

wherein said locking arrangement comprises:

a first part arranged to at least partially enclose said at least two portions of said inner housing when said locking arrangement is in the locking configuration, wherein said inner housing comprises at least one angled abutment surface arranged to abut at least one abutment surface on the first part when the locking arrangement is in the locking configuration,

a piston arranged at least partially inside said expansion chamber, and

at least one locking element which is held between said first part and said piston when said locking arrangement is in the locking configuration, thereby preventing said first part from releasing said at least two portions of said inner housing.

2. The separation device according to claim 1 , wherein the piston is arranged such that the high pressure fluid provided in said expansion chamber moves the piston in a first direction, wherein the first direction is parallel with a longitudinal extension of the separation device.

3. The separation device according to claim 2 , wherein said locking arrangement is arranged such that when the high pressure fluid in said expansion chamber moves the piston of the locking arrangement from a blocking position to an unblocking position, said first part of said locking arrangement is free to move in a second direction.

4. The separation device according to claim 3 , wherein said first direction and said second direction are opposite to each other.

5. The separation device according to claim 1 , wherein said abutment surfaces are conical surfaces.

6. The separation device according to claim 1 , wherein said at least one locking element is ball-shaped or spherical.

7. The separation device according to claim 1 , wherein said piston comprises at least one protruding portion extending in a direction away from said expansion chamber, and wherein said at least one locking element is held between said first part and said at least one protruding portion when said locking arrangement is in the locking configuration.

8. The separation device according to claim 7 , wherein said at least one locking element is held between said first part, said at least one protruding portion, and a body of said separation device when said locking arrangement is in the locking configuration.

9. The separation device according to claim 7 , wherein each one of said at least one protruding portion comprises at least one opening, each of which is arranged such that at least one of said at least one locking element may at least partially enter said opening.

10. The separation device according to claim 1 , wherein the first part is arranged between the piston and the inner housing.

11. The separation device according to claim 1 , wherein said inner housing comprises engaging material for engaging said component to said separation device.