Patent ID: 8066248

Claim:
A mounting device ( 10 ) for fastening a chair or seat to a groove ( 41 ), said groove comprising engagement means ( 45 ), where the mounting device ( 10 ) comprises locking means ( 20 ) for entering the groove ( 41 ) and for being moved along the longitudinal axis of the groove ( 41 ); said locking means ( 20 ) having means ( 23 ) for engaging with the engagement means ( 45 ) of the groove ( 41 ); positioning means ( 30 ) for locating a position of the mounting device ( 10 ) where the locking means ( 20 ) will be able to engage with the engagement means ( 45 ) of the groove ( 41 ); characterized in that the mounting device ( 10 ) comprises: a first cam ( 22 ) for controlling the engagement and disengagement of the locking means with said engagement means; a second cam ( 32 ), axially displaced from said first cam ( 22 ), for switching the positioning means ( 30 ) into an active position, where the positioning means ( 30 ) extend into the groove ( 41 ) in selected parts thereof; a shaft ( 5 ) for rotating both the first and the second cam ( 22 , 32 ), said shaft ( 5 ) being, by a rotational movement, able to adjust the mounting device ( 10 ) between at least three modes: 1) the positioning means ( 30 ) is passive and the locking means ( 20 ) are disengaged, 2) the positioning means ( 30 ) is active and the locking means ( 20 ) are disengaged, 3) the locking means ( 20 ) are engaged with the engagement means ( 45 ).