Collapsible shelf

Claim 1

A COLLAPSIBLE SHELF COMPRISING A PLANAR MEMBER HAVING AN UPPER AND UNDER SURFACE AND ADAPTED TO NORMALLY ASSUME A VERTICAL POSITION ADJACENT A WALL AND TO BE BROUGH INTO A HORIZONTAL POSITION IN SUBSTANTIALLY ABUTTING RELATIONSHIP WITH SAID WALL COMPRISING HINGE MEANS COMPRISING FIRST AND SECOND PLATES AND ON FIRST PINTLE ON WHICH END EDGE EXTENSIONS OF EACH OF SAID PLATES IN PIVOTEDLY MOUNTED, SAID FIRST AND SECOND PLATES BEING AFFIXED TO SAID UNDERSURFACE AND SAID WALL RESPECTIVELY AT LOCATIONS WHEREBY SAID PINTLE IS LOCATED AT THE ABUTTING JUNCTION OF SAID SHELF AND SAID WALL, A SUPPORT LEAF, A SECOND PINTLE, A SIDE EDGE EXTENSION OF SAID SUPPORT LEAF AND A SIDE EDGE OF SAID FIRST PLATE BEING PIVOTEDLY MOUNTED ON SAID SECOND PINTLE TO ADAPT SAID LEAF TO BE ROTATABLY MOVED ABOUT A HORIZONTAL AXIS, STOP MEANS PROVIDED ON SAID SECOND PLATE FOR PREVENTING MOVEMENT OF SAID SUPPORT LEAF ABOUT BEYOND THE POINT WHERE SAID LEAF ATTAINS A POSITION PERPENDICULAR TO SAID UNDERSURFACE AND SAID WALL, TENSIONING MEANS JOINTLY OPERATIVELY ASSOCIATED WITH SAID SECOND PINTLE AND SAID SUPPORT LEAF FOR URGING SAID LEAF INTO SAID PERPENDICULAR POSITION, AN EXTENSION PIECE AFFIXED TO SAID WALL ADJACENT SAID SECOND PLATE AND SUBSTANTIALLY COVERING AT LEAST THE PATH SWEPT OUT BY THE END EDGE OF SAID LEAF ADJACENT SAID WALL AS SAID LEAF IS ROTATED BETWEEN ITS HORIZONTAL AND VERTICAL POSITIONS, AND A RAMP ON SAID EXTENSION PIECE ADJACENT SAID SECOND PLATE BEARING AGAINST SAID END EDGE OF SAID LEAF.