Patent ID: 9393846
Filing Date: 2016-07-19
CPC Classification: B60D

Claim Text:
1. Trailer coupling for motor vehicles, comprising a coupling ball carrier mountable on a vehicle body and a coupling ball with a ball body having a ball surface extending between a ball attachment and an upper end surface of the ball body, the ball surface comprising a sensor zone, several stationary detection locations different from one another being located in said sensor zone, a sensor unit arranged stationarily in the ball body beneath the ball surface being associated with each detection location and each sensor unit being designed such that it detects a body present in a close-proximity area above the ball surface at the respective detection location; wherein the sensor units are designed as sensor units detecting a magnetizable body; wherein the sensor units are designed as sensor units detecting a change in a course of a magnetic field caused by the body; and wherein the sensor units have a magnet generating the magnetic field as well as a magnetic field sensor.