Patent ID: 7841803

Claim:
An adapter device ( 1 ) for connecting a drilling machine ( 3 ) to a self drilling rock bolt ( 7 ) for rock bolting, said adapter device including an adapter element ( 14 ) which is sealingly surrounded by a swivel sleeve ( 13 ) that is arranged for connection of an axial channel through the adapter device ( 20 ), which in operation cooperates with an axial flushing channel in the rock bolt, to at least one external source for flushing medium ( 8 ) and bolt grouting medium ( 9 ), wherein the adapter element ( 14 ) at a distal end ( 11 ) includes a thread for connecting to a corresponding thread on the rock bolt ( 7 ), wherein the adapter element ( 14 ) at a proximal end ( 12 ) includes an integral connection portion for connection to the drilling machine ( 3 ), the adapter element and the connection portion thereof being integrally formed as one single element in one piece; and means for maintaining the swivel sleeve ( 13 ) surrounding the adapter element ( 14 ) at a position outside of said drilling machine ( 3 ) during operation of said adapter device.