Sliding and rotating shelf

Claim 1

A CABINET STRUCTURE, COMPRISING: WALLS FORMING A CHAMBER HAVING AN ACCESS OPENING; A MOVABLE SHELF HAVING SIDES IN SAID CHAMBER AND A SUBSTANTIALLY HORIZONTAL UPPER ARTICLE SUPPORTING AREA; FIXED SIDE SUPPORT MEANS SEPARATE FROM SAID SHELF AND ADJACENT SAID SIDES FOR SUPPORTING SAID SHELF SUBSTANTIALLY CONTINUALLY DURING MOVEMENT OF SAID SHELF IN A SUBSTANTIALLY HORIZONTAL PATH WITHIN THE CHAMBER FORWARDLY AND REARWARDLY WITH RESPECT TO SAID SUPPORT MEANS AND TO SAID OPENING; A FIRST PIVOT MEMBER ON SAID SHELF BENEATH SAID ARTICLE SUPPORTING AREA AND INTERMEDIATE SAID SHELF SIDES; A SECOND PIVOT MEMBER ENGAGED BY SAID FIRST PIVOT MEMBER ON SAID FORWARD MOVEMENT; AND MEANS FOR POSITIONING SAID FIRST AND SECOND PIVOT MEMBERS WITH RESPECT TO SAID SHELF AND SAID FIXED SIDE SUPPORT MEANS FOR PERMITTING ROTATIONAL MOVEMENT OF SAID SHELF IN A SUBSTANTIALLY HORIZONTAL PLANE ABOUT SAID SECOND PIVOT MEMBER AFTER SAID FORWARD MOVEMENT OF THE SHELF WHILE MAINTAINING SAID SUPPORTING ENGAGEMENT OF SAID SHELF WITH SAID SIDE SUPPORT MEANS.