Vehicle motion actuating tilting trailer bed

Claim 1

A TRAILER COMPRISING A MOBILE WHEELED FRAME, A PLATFORM, MEANS CONNECTING THE PLATFORM TO THE FRAME FOR SWINGING MOVEMENT ABOUT A HORIZONTAL AXIS DISPOSED ADJACENT THE REAR OF THE FRAME, AND MEANS MOUNTED ON THE FORWARD PORTION OF THE PLATFORM FOR ELEVATING THE FORWARD END OF THE PLATFORM IN RESPONSE TO FORWARD MOVEMENT OF THE FRAME, SAID LAST-MENTIONED MEANS INCLUDING AN ELONGATED SHAFT ROTATABLY MOUNTED ON THE FORWARD PORTION OF THE PLATFORM AND EXTENDING TRANSVERSELY THEREACROSS, A SEGMENTAL ECCENTRIC WHEEL FIXED TO ONE END OF SAID SHAFT ALONG ONE SIDE OF THE PLATFORM FOR ROTATION THEREWITH AND SELECTIVE ENGAGEMENT WITH THE GROUND, SAID ECCENTRIC WHEEL HAVING A PROGRESSIVELY GREATER RADIAL DIMENSION FROM A SHORTER FORWARD END TO A LARGER RERE END, A COUNTERWEIGHT FIXED TO THE SHAFT, SAID COUNTERWEIGHT BEING ORIENTATED SO AS TO BIAS THE SHAFT AND WHEEL TOWARD THE FORWARD END OF THE FRAME FOR INITIAL ENGAGEMENT OF THE SHORTER END OF THE WHEEL WITH THE GROUND, RELEASABLE LATCH MEANS FOR PREVENTING ROTATION OF SAID SHAFT AND MAINTAINING THE WHEEL OUT OF ENGAGEMENT WITH THE GROUND, AND MEANS FOR LIMITING ROTATION OF SAID SHAFT, UPON A RELEASE OF THE LATCH MEANS, TO ONE COMPLETE REVOLUTION.