Portable building structure

Claim 1

A PORTABLE EXPANDABLE CABIN STRUCTURE OR THE LIKE COMPRISING A CENTRAL BODY PORTION WITH A FIXED FLOOR, FIXED WALLS AND A FIXED ROOF PROVIDING AN OPEN VERTICAL SIDE THEREOF, SAID OPEN VERTICAL SIDE HAVING GENERALLY THE SAME DIMENSIONS AS SAID FIXED ROOF, A PORTABLE FLOOR SLIDABLE FROM A STORED POSITION SUBSTANTIALLY PARALLEL WITH AND ABOVE SAID FIXED FLOOR TO AN EXPANDED POSITION SUBSTANTIALLY COPLANAR WITH SAID FIXED FLOOR, SAID PORTABLE SLIDABLE FLOOR HAVING A WALL SECTION HINGEDLY MOUNTED ALONG ONE SIDE OF SAID PORTABLE FLOOR, A FOLDABLE ROOF SECTION HINGEDLY MOUNTED ALONG THE OPEN SIDE OF SAID FIXED ROOF, AND A PAIR OF WALL SECTIONS VERTICALLY MOUNTED SWINGABLY ON SAID FIXED WALLS AT OPPOSITE OPEN ENDS OF SAID CENTRAL BODY PORTION AND ENGAGEABLE WITH SAID PORTABLE FLOOR, SAID FIRST HINGED WALL SECTION AND SAID FOLDABLE ROOF SECTION, SAID CABIN BEING IN AN EXPANDED POSITION.