Roof buggy

Claim 1

A ROOF BUGGY FOR DISTRIBUTING ROOFING MATERIALS INCLUDING A MOBILE UNIT CARRIED BY WHEELS AND TILTABLY SUPPORTING A FRAME INCLUDING SLED-SHAPED PARALLEL SIDE MEMBERS EACH HAVING AN UPPER RAIL CONNECTED BY VERTICAL POSTS TO A LOWER RAIL THAT SLOPES UPWARDLY AT THE FRONT TO MEET THE UPPER RAIL AND IS SECURED THERETO, A TRANSVERSE STRINGER CONNECTING THE REAR ENDS OF SAID BOTTOM AND SAID TOP RAILS, A PLURALITY OF STRINGERS PARALLEL TO SAID END STRINGERS CONNECTING SAID TOP RAILS WITH ONE STRINGER ADJACENT THE FRONT END TO FORM A DECK, ROLLER MEANS ON SAID DECK STRINGERS SAID VERTICAL POSTS AT THE REAR OF EACH SIDE MEMBER AND EXTENDING ABOVE SAID DECK TO FORM A STOP, SAID ROLLER MEANS EXTENDING ABOVE SAID TOP RAILS TO ALLOW A LOAD SUPPORTED ON SAID DECK OF SAID FRAME TO SLIDE AS A UNIT LOAD OVER SAID ROLLER MEANS TO THE ROOF AND BE REMOVED FROM SAID DECK OF SAID MOBILE UNIT BY WITHDRAWING THE WHEELED BUGGY WHEN SAID FRAME IS TILTED, A TONGUE FRAME EXTENDING TO AN APEX BEHIND SAID DECK, TRAILER HITCH MEANS ON SAID APEX, AXLE MEANS SECURED TRANSVERSE OF THE FRONT OF SAID TONGUE FRAME TO RECEIVE SAID WHEELS, SLEEVE MEANS FASTENED TRANSVERSELY ON SAIDTONGUE FRAME ABOVE SAID AXLE, MEANS, TRANSVERSE PIVOT MEANS SECURED TO SAID BOTTOM RAILS OPERATING IN SAID SLEEVE MEANS AND TILTABLY SUPPORTING SAID DUMP FRAME AND POSITIONED TO BIAS SAID DUMP FRAME TO DUMP THE SAME WHEN UNLOADED, DELATCHABLE SPRING LATCH MEANS TO RELEASABLY RETAIN SAID DUMP FRAME IN LOAD CARRYING POSITION, AND A STOP ON SAID TONGUE FRAME TO LIMIT THE DUMPING MOVEMENT OF SAID DUMP FRAME AND PREVENT SAID SLED SHAPED SIDE MEMBERS FROM STRIKING THE ROOF WHEN IN DUMPING POSITION TO SLIDE THE UNIT LOAD FROM SAID ROLLERS ON SAID DECK.