Patent ID: 7971891
Filing Date: 2011-07-05
Classification: A61G,B60R,B61D

Abstract:
1. A boarding and access aid for vehicles with passenger carrying service, containing a frame ( 3 ) with two parallel side parts ( 4 ) connected by an end profile ( 5 ), which side parts are formed by a bottom part ( 4 a ), a cover part ( 4 b ) and an outer wall ( 4 c ) connecting the both of them, containing a step plate ( 2 ) supported in the side parts ( 4 ) in such a manner that it can be retracted and extended, and drive means for the step plate ( 2 ), which means comprises a drive motor ( 10 ), which drive motor ( 10 ) is arranged in a rear area of the frame ( 3 ) and in which the bottom parts and cover parts ( 4 a , 4 b ) comprise guide tracks ( 9 ) for the step plate ( 2 ), characterized in that the drive means contains two drive elements ( 19 ) designed as a chain or belt and each associated with one of the two side parts ( 4 ), and that these drive elements ( 19 ) are arranged between the guide tracks ( 9 ) and the outer walls ( 4 c ) of the associated side parts ( 4 ), have a driving connection to the step plate ( 2 ) and are guided over a deflection roller ( 18 ) and a drive roller ( 17 ) connected to the drive motor ( 10 ), and inner sides of the side part ( 4 ) located opposite the outer wall ( 4 c ) are sealed with seals ( 24 , 25 ), wherein the seals are labyrinth seals, and wherein one of the seals ( 24 ) is arranged on an inner side of the bottom parts and cover parts ( 4 a ), whereas the other of said seals ( 25 ) is fastened to a side plate ( 7 a ) of the step plate ( 2 ).