Trailer having longitudinally adjustable and driven rear wheels

Claim 1

IN A TRAILER-MIXER CONSTRUCTION WHEREIN SAID TRAILER COMPRISES A MAIN FRAME DEFINING A BED PORTION FOR CARRYING A ROTATABLY DRIVEN MIXER DRUM, THE IMPROVEMENT WHEREIN SAID MAIN FRAME INCLUDES LONGITUDINAL FRAME MEMBERS DEFINING HOLLOW INTERIOR PORTIONS IN THE REAR SECTIONS THEREOF, A BOGEY CONSTRUCTION FOR CARRYING THE REAR WHEELS OF SAID TRAILER, SAID BOGEY INCLUDING LONGITUDINALLY DISPOSED MEMBERS ADAPTED TO BE SLIDEABLY RECEIVED WITHIN SAID HOLLOW INTERIOR PORTIONS, A GUIDE TRACK FORMED IN SAID MAIN FRAME, MEANS ASSOCIATED WITH SAID BOGEY FOR MAINTAINING THE BOGEY ON SAID GUIDE TRACK, LATCH MEANS FOR SECURING SAID BOGEY IN A FORWARD POSITION AND IN A REARWARD POSITION, BRAKE MEANS ASSOCIATED WITH SAID REAR WHEELS WHEREBY SAID MAIN FRAME CAN BE MOVED RELATIVE TO SAID BOGEY WHEN SAID BRAKES ARE APPLIED AND SAID LATCH MEANS ARE RELEASED, AND DRIVE MEANS OPERATIVELY CONNECTED TO SAID REAR WHEELS AND SUPPORTED BY SAID BOGEY WHEREBY DRIVING MOVEMENT OF SAID REAR WHEELS CAN BE EFFECTED.