Patent ID: 6948731
Filing Date: 2005-09-27
Classification: B62H,B62K

Abstract:
1. A theft-proof bicycle comprising a frame structure consisting of three frame parts, a front ( 2 ) and a rear ( 3 ) slanting frame part and an intermediate transverse part ( 1 ), which are connected so as to form a triangle having a front corner ( 6 ), a bottom corner ( 7 ) and a back corner ( 8 ), where a handlebar stem ( 4 a ) between a handlebars ( 14 ) and a front wheel's supporting fork ( 4 ) is attached to the triangle's front corner ( 6 ), while a rear wheel's supporting fork structure ( 5 a , 5 b ) is attached to the frame structure ( 1 , 2 , 3 ) in the areas of the two other corners ( 7 , 8 ) of the triangle and a pedal crank is arranged at the triangle's bottom corner ( 7 ), characterised in that frame parts ( frame part ( the frame structure (