Patent ID: 7097192

Claim:
A trailer slider comprising: an actuation member for changing a position of a pair of locking pins, and driving the pair of locking pins between a non-engaged and an engaged position; a feedback member moving with said actuation member, said feedback member being in an expected position in said engaged position of said pair of locking pins; and said feedback member communicating a position of said pair of locking pins to an interlock valve, said interlock valve ensuring a parking brake associated with a trailer carrying the trailer slider is in a park position if said feedback member does not communicate that said pair of locking pins are in said expected position; and the trailer also being provided with a parking brake control valve and a compressed air reservoir, said interlock valve being positioned on a pressurized air supply line downstream of said parking brake control valve and said compressed air reservoir; and wherein said interlock valve connects said compressed air reservoir to atmosphere if said feedback member is not in said expected position.