Seating device

Claim 1

A CHAIR COMPRISING: (A) A UNITARY, INTEGRAL, HOLLOW, ROTATIONAL-MOLDED, RESILIENT PLASTIC UPPER CHAIR STRUCTURE INCLUDING AN INTEGRAL, GENERALLY UPWARDLY CONCAVE, CONTINUOUS UPPER PANEL SHAPED TO DEFINE A CONTINUOUS CONTOURED SEAT PORTION AND BACK REST PORTION; (B) AN INTEGRAL, GENERALLY DOWNWARDLY CONVEX, CONTINUOUS LOWER SUPPORT PANEL SPACED FROM SAID UPPER PANEL AND BEING INTEGRALLY FORMED AT ITS PERIPHERAL EDGES WITH THE PERIPHERAL EDGES OF THE UPPER PANEL; (C) SAID LOWER PANEL HAVING A RECESS THEREIN LOCATED SUBSTANTIALLY CENTRALLY IN THAT PORTION THEREOF THAT UNDERLIES THE SEAT PORTION OF SAID UPPER PANEL AND DEFINING A DOWNWARDLY FACING SOCKET; (D) A PLURALITY OF TRANSVERSE RECESSES IN THAT PORTION OF SAID LOWER PANEL UNDERLYING THE SEAT PORTION OF SAID UPPER PANEL, SAID TRANSVERSE RECESSES COMMUNICATING WITH SAID CENTRAL RECESS AND EXTENDING OUTWARDLY THEREFROM AND DEFINING A PLURALITY OF CHANNEL SHAPED GENERALLY VERTICALLY ORIENTED RIBS; (E) A CHAIR BASE COMPRISING A PLURALITY OF GENERALLY INVERTED, U-SHAPED LEG MEMBERS EACH INCLUDING A TRANSVERSE PORTION AND A PAIR OF DEPENDING LEG PORTIONS; (F) AN UPWARDLY PROJECTING SOCKET ENGAGING ELEMENT INSERTABLE INTO SAID SOCKET OF SAID LOWER PANEL MEMBER WHICH ENGAGING ELEMENT IS FORMED OF COMPRESSIBLE RESILIENT MATERIAL RECEIVABLE INTO SAID SOCKET WHEN IN NORMAL UNCOMPRESSED CONDITION; AND (G) MEANS FOR CONNECTING SELECTED SECTIONS OF THE TRANSVERSE PORTIONS OF SAID LEG MEMBES TO SAID SOCKET ENGAGING ELEMENT WHICH MEANS IS PROVIDED TO RIGIDLY CONNECT SAID LEG MEMBERS TOGETHER WHILE MAINTAINING SAID SOCKET ENGAGING ELEMENT IN UNCOMPRESSED CONDITION AND FURTHER HAVING ADJUSTMENT APPARATUS THEREON FOR COMPRESSING AND EXPANDING SAID ELEMENT AFTER INSERTION INTO SAID SOCKET TO ENGAGE THE INNER SURFACE THEREOF.