Patent ID: 7520090

Claim:
A wall or door element comprising: a) a lower castor ( 12 ); b) a castor carrier ( 21 ) for carrying the castor ( 12 ), wherein the castor carrier ( 21 ) is a U-shaped element having two upright supporting limbs ( 22 ) between which the castor ( 12 ) is mounted; c) a transversely directed with respect to and castor axle ( 23 ) connecting the two supporting limbs ( 22 ) to each other; d) a hub ( 25 ) located on the castor axle ( 23 ), wherein the castor ( 12 ) is rotatably mounted on the hub ( 25 ) by ball bearings ( 24 ); e) a floor runner ( 13 ) comprising two runner limbs ( 17 ) which the castor ( 12 ) rollably engages and a guide slot ( 18 ) between the runner limbs ( 17 ); f) a securing member ( 28 ) pivotally mounted on the hub ( 25 ), wherein the securing member ( 28 ) prevents the castor ( 12 ) from lifting off of the floor runner ( 13 ), the securing member ( 28 ) comprising: i) two supporting walls ( 30 ) that are disposed a distance from each other and are pivotably mounted on the hub ( 25 ) on both sides of the castor ( 12 ); and ii) anchoring members each having securing hooks ( 31 , 32 ), each said securing hook including a laterally directed projection ( 33 ), wherein the anchoring members extend into the floor runner ( 13 ) via the guide slot ( 18 ) with one of said anchoring members in front of said castor in a direction in which the castor rolls and another one of said anchoring members behind said castor in said direction, whereby the laterally directed projections ( 33 ) of the securing hooks ( 31 , 32 ) are located underneath the runner limbs ( 17 ), wherein the wall or door element is movable via the lower castor ( 12 ) on the floor runner ( 13 ) and the wall or door element is at least partially liftable and lowerable relative to the castor ( 12 ).