Drive belt with a carrier ring and transverse segments

A transverse segment (33) for a drive belt (3) with a carrier ring (31) and with a number of such transverse segments (33) that are slideably mounted on the carrier ring (31), the drive belt (3) forming a closed loop with an inner side and an opposite outer side, wherein each transverse segment (33) is a metal plate that comprises:

• two friction surfaces (43), wherein the transverse segment extends in a width direction between the two friction surfaces (43);
• two main body surfaces (38, 41), wherein the transverse segment extends in a thickness direction between the two main body surfaces (38, 41),
• wherein the transverse segment extends in a height direction, oriented perpendicular to both the width direction and the thickness direction, between an innermost part of the transverse segment with respect to the driving belt and an outermost part of the transverse segment with respect to the driving belt;
• wherein at least one of the two main body surfaces (38) is provided with i) a transition surface (42) that extends in the width direction and that forms a transition between the outermost part of the transverse segment (33) with a predominantly constant thickness and ii) the innermost part of the transverse segment (33) where a thickness of the innermost part of the transverse segment (33) reduces in the height direction away from the transition surface (42);
• and
• at least one opening (44) that is located in the innermost part of the transverse segment (33), the at least one opening (44) extending completely through the transverse segment (33) in the thickness direction of the transverse segment (33),
• wherein at least one of i) an upper boundary surface (46) of the at least one opening (44) located on a top side of the at least one opening (44) and ii) a lower boundary surface (45) of the at least one opening (44) located on a bottom side of the at least one opening (44) is provided with protrusions (47) that are undulating, and
• wherein only the upper boundary surface (46) of the at least one opening (44) is provided with the protrusions (47) and the lower boundary surface (45) is an essentially flat surface.