Motor vehicle door construction

Claim 1

A SLIDABLE DOOR ARRANGEMENT, ESPECIALLY FOR PASSENGER MOTOR VEHICLES HAVING A VEHICLE BODY PROVIDED WITH AT LEAST ONE DOOR APERTURE AND A FIXED VEHICLE PART POSITIONED BELOW SAID DOOR APERTURE, A SLIDING DOOR NORMALLY CLOSING SAID DOOR APERTURE, SUPPORT MEANS FOR SUPPORTING SAID DOOR IN AN OPEN POSITION CONSISTING ESSENTIALLY EXCLUSIVELY OF A SINGLE SUPPORT ARM ASSEMBLY HAVING AN UPPER END AND A LOWER END, SAID SUPPORT ARM ASSEMBLY HAVING MEANS INCLUDING LINK MEMBERS INTERCONNECTED TO FORM A QUADRILATERAL, ESSENTIALLY LONGITUDINAL PIVOT MEANS TO PIVOTABLY SECURE SAID LOWER END OF SAID SUPPORT ARM ASSEMBLY TO SAID FIXED VEHICLE PART TO ENABLE FIRST MOVEMENT OF SAID DOOR FROM A CLOSED POSITION THEREOF IN THE TRANSVERSE DIRECTION OF THE VEHICLE AWAY FROM SAID DOOR APERTURE, GUIDE MEANS CONNECTED TO SAID UPPER END OF SAID SUPPORT ARM ASSEMBLY AND PIVOTABLE THEREWITH, AND COMPLEMENTARY GUIDE MEANS SECURED TO THE INSIDE OF SAID DOOR AND COOPERATING WITH SAID FIRST-MENTIONED GUIDE MEANS TO ENABLE A SECOND MOVEMENT OF SAID DOOR ESSENTIALLY IN THE LONGITUDINAL DIRECTION OF THE VEHICLE, THE ABOVE-ENUMERATED SUPPORT MEANS BEING POSITIONED WITHIN THE INTERIOR OF SAID VEHICLE BODY IN THE CLOSED POSITION OF SAID DOOR.