US Patent 7575450 Electrical connector assembly

An electrical connector assembly, such as for use with a tractor-trailer, comprises a socket and a plug. The plug can comprise a resilient seal configured to surround mating electrical terminals on the socket and the plug. A coupler can be configured to retain the plug in the socket and compress the resilient seal against the socket. The plug can further comprise a knob having a bulbous portion sized to fit in a palm of a user's hand for ease of grasping by the user. The knob can include a drip edge.