Extendable reach for tractortrailer vehicles

Claim 1

AN EXTENDABLE TRAILER REACH FOR CONNECTING A STEERABLE TRAILER VEHICLE HAVING A MOVABLE LOAD BED WITH A TRACTOR VEHICLE ALSO HAVING A MOVABLE LOAD BED, SAID REACH COMPRISING; AN OUTER REACH SECTION CONNECTED AT ONE END TO THE LOAD BED OF ONE OF SAID VEHICLES AND AN INNER REACH SECTION CONNECTED AT ONE END OT THE LOAD BED OF THE OTHER SAID VEHICLES AND SLIDABLE WITHIN SAID OUTER REACH SECTION; A PAIR OF CROSS BAR LOCATED NEAR THE OPPOSITE ENDS OF SAID OUTER REACH SECTION, EACH SAID CROSS BAR HAVING AN OPENING; A LOCKING DOG MEANS PIVOTALLY ATTACHED TO SAID INNER REACH SECTION AND HAVING AN END PORTION AXIALLY ALIGNED WITH AND ADAPTED WHEN LOWERED, TO ENTER THE SAID OPENING OF THE ADJACENT CROSS BAR TO CONNECT SAID REACH SECTION AT EITHER THE RETRACTED OR EXTENDED POSITION; SENSING MEANS CONNECTED TO SAID DOG MEANS TO CONTROL THE MOVEMENT OF SAID DOG MEANS, SAID SENSING MEANS COMPRISING A CAM FOLLOWER RIGIDLY FIXED TO SAID LOCKING DOG AND POSITIONED TO NORMALLY RIDE ALONG A LONGITUDINALLY MEMBER OF SAID OUTER REACH AS THE REACH SECTIONS ARE BEING MOVED APART; SLOT MEANS ON SAID OUTER REACH SECTION HAVING THE SAME RELATIVE POSITION TO A SAID OPENING IN SAID CROSS BAR AS SAID SENSING MEANS HAS TO THE LOCATION OF SAID END PORTION OF SAID LOCKING DOG MEANS; WHEREBY AS SAID INNER REACH SECTION IS BEING MOVED RELATIVE TO SAID OUTER REACH SECTION, SAID SENSING MEANS WILL KEEP ITS ATTACHED LOCKING DOG RAISED AND DISCONNECTED AND WILL LOWER SAID LOCKING DOG INTO SAID OPENING WHEN SAID SENSING MEANS DROPS WITHIN A SAID SLOT.