Patent ID: 8448578

Claim:
A crane head carrier ( 7 ) for running on a crane rail ( 2 ) comprising: running wheels ( 10 ) for running along sides of the crane rails ( 2 ), a guide roller arrangement for the crane head carrier ( 7 ), said guide roller arrangement including a carrier plate ( 15 ) having at least one circular receiving opening ( 20 ) with a longitudinal axis ( 41 ) of which extends alongside a crane rail ( 2 ), an axle carrier ( 21 ) seated in said receiving opening ( 20 ), a guide roller ( 11 , 12 ) rotatably mounted on said axle carrier ( 21 ), said axle carrier ( 21 ) having an exterior outside toothing ( 29 ) formed a number of teeth about a circle an axial distance away from the guide roller ( 11 , 12 ), said guide roller ( 11 , 12 ) having a rotary axis ( 42 ) in parallel laterally offset relation to a center axis ( 41 ) of the circle along which the outside toothing ( 29 ) extends, said carrier plate ( 15 ) having an inside toothing ( 36 ) with a number of teeth that is an integer multiple of the number of teeth of said outside toothing ( 29 ) on the axle carrier ( 21 ), said inside toothing ( 36 ) defining an inner most root circle diameter and said outside toothing ( 29 ) defining an outer most tip circle diameter, and said root circle diameter of said inside toothing ( 36 ) coinciding with the tip circle diameter of said outside toothing ( 29 ).