Trailer with elevatable bed

Claim 1

A TRAILER COMPRISING A SUB-FRAME HAVING FIRST AND SECOND FRAME PORTIONS, SAID FIRST FRAME PORTION INCLUDING A PAIR OF TRANSVERSELY SPACED, LONGITUDINALLY EXTENDING FRAME MEMBERS, A TRANSVERSE MEMBER CONNECTING SAID FRAME MEMBERS ADJACENT THE FORWARD ENDS THEREOF, WHEELED MEANS SUPPORTING SAID FIRST FRAME PORTION FORWARDLY OF SAID TRANSVERSE MEMBER, SAID SECOND FRAME PORTION INCLUDING A PAIR OF TRANSVERSELY SPACED, LONGITUDINALLY ENXTENDING FRAME MEMBERS, A TRANSVERSE MEMBER CONNECTTING SAID FRAME MEMBERS ADJACENT THE REARWARD ENDS THEROF, SAID FIRST AND SECOND PAIRS OF FRAME MEMBERS TELESCOPICALLY INTERFITTING WITH EACH OTHER SUCH THAT ONE OF SAID FRAME PORTIONS IS MOVABLE LONGITUDINALLY RELATIVE TO THE OTHER OF SAID FRAME PORTIONS AND FORMS THEREWITH A RELATIVLEY LARGE OPENING IN SAID SUB-FRAME, FLUID ACTUATOR MEANS CONNECTED BETWEEN SAID FIRST AND SECOND FRAME PORTIONS FOR MOVING ONE OF SAID FRAME PORTIONS LONGITUDINALLY RELATIVE TO THE OTHER OF SAID FRAME PORTIONS, ELEVATABLE LOAD CARRYING MEANS DISPOSED ABOUT SAID SUBFRAME, AND ELEVATING MECHANISM SECURED TO SAID LOAD CARRYING MEANS AND TO EACH OF SAID FIRST AND SECOND FRAME PORTIONS ADJACENT AND BELOW SAID FORWARD AND REARWARD TRANSVERSE MEMBERS, SAID ELEVATING MECHANISM BEING DISPOSABLE WITHIN SAID OPENING WHEN COLLAPSED SO THAT SAID LOAD CARRYING MEANS IS SUPPORTED UPON SAID FRAME PORTIONS, TELESCOPICAL MOVEMENT OF SAID FIRST AND SECOND FRAME PORTIONS EFFECTING ELEVATING MOVEMENT OF SAID MECHANISM AND LOAD CARRYING MEANS AND EXTENDING MOVEMENT THEREOF EFFECTING LOWERING MOVEMENT OF SAID MECHANISM.