Patent ID: 8162129

Claim:
Conveyance means ( 1 ) comprising track rollers ( 7 ) supported on a guideway ( 2 ), at least one track roller ( 7 ) being attached with the help of a swivel mechanism ( 13 , 33 ) to a roller lever ( 12 a ) , the roller lever ( 12 a ) being swiveled between a first and a second position and which can be stopped in a position, the swivel mechanism ( 13 , 33 ) having a knee lever ( 14 ) with a first and a second lever member ( 14 a , 14 b ), the first and the second lever member being connected to each other via an articulation ( 15 ), and the knee lever being in connection with an actuation element ( 21 ), wherein the actuation element contains a control surface engageable with an additional control surface outside of the conveyance means, and wherein the knee lever presents at least one spring element for stopping the first and second lever members in at least one relative position.