Patent ID: 7619506
Filing Date: 2009-11-17
Classification: B60D,B62D

Abstract:
1. A sensor device for detecting whether a trailer is connected to a hitch, comprising: a container; tabs extending from said container to engage an inside surface of a bearing plate of said trailer when said container is located in a hole in said bearing plate; said container having a face surface that is substantially parallel to a bearing face of said bearing plate when said container is located in said hole; a spring extending from a base of said container away from said face surface to bear upon an interior wall of said trailer to bias said tabs into contact with said inside wall when said container is located in said hole to maintain a position of said container therein; and a sensor for sensing proximity of a ferrous material and being located in said container, wherein said sensor senses proximity of ferrous material of the hitch without sensing ferrous material of said bearing plate.