Boat trailer with push-off device

Claim 1

IN A BOAT TRAILER, A FRAME; A TONGUE PIVOTALLY ATTACHED TO THE FRAME; KEEL ROLLERS ARRANGED CENTRALLY OF THE FRAME; A PAIR OF LATERALLY SPACED, LONGITUDINALLY EXTENDING, BOLTERS SECURED TO THE FRAME AT THE REAR THEREOF; A ROLLER MOUNTED AT THE REAR OF EACH BOLSTER, WITH THE UPPER SURFACES OF SAID ROLLERS ARRANGED ABOVE THE UPPER SURFACES OF THE BOLSTERS; A WINCH INCLUDING A ROTATABLE DRUM MOUNTED ON THE TONGUE; A LINE WOUND ABOUT THE DRUM; MEANS TO ROTATE THE DRUM; A LEVER PIVOTALLY CARRIED BY THE TONGUE, HAVING LEGS EXTENDING FROM THE PIVOT POINT THEREFOR, AT LEAST ONE OF SAID LEGS BEING ARRANGED TO ENGAGE A BOAT DISPOSED ON THE FRAME; A LINE ATTACHMENT MEMBER ON THE OTHER LEG, INCLUDING A HOOK; MEANS TO ATTACH THE LINE TO THE LINE ATTACHMENT MEMBER INCLUDING A RING ENGAGEABLE OVER THE HOOK; A LINE EXTENSION ATTACHED TO THE RING; ATTACHMENT MEANS ON THE FREE END OF THE LINE EXTENSION FOR ATTACHING SAME TO THE BOW EYE ON A BOAT; THE HOOK ON THE ATTACHMENT MEMBER AND THE RING ON THE LINE BEING SO RELATED THAT UPON OUTWARD FORCE BEING EXERTED ON THE LINE EXTENSION THE RING WILL BE DISENGAGED FROM THE HOOK.