Chair with a unitary suspended seat and backrest

Claim 1

A SEAT CONSTRUCTION COMPRISING SUPPORTING LEGS, AN ARM AND BACK FRAME COMPRISING A PAIR OF REARWARDLY EXTENDING ARM PORTIONS WHICH EXTEND AT THEIR NEAR ENDS UPWARDLY AND INWARDLY TOWARD EACH OTHER, AND A BACK MEMBER CONNECTING THE SAME IN ELEVATED POSITION RELATIVE TO THE ARM PORTIONS, THE BACK MEMBER BEING AT THE REAR OF THE ARM PORTIONS, A COMBINED FLEXIBLE SEAT AND BRACKREST UNIT MOUNTED ON THE ARM PORTIONS AND ON THE BACK MEMBER, THE BACKREST HAVING AN UPPER EDGE AND A LOWER EDGE, THE SEAT EXTENDING BETWEEN THE ARM PORTIONS AND HAVING END EDGE PORTIONS AND CONNECTING SIDE EDGE PORTIONS, ONE OF THE SIDE EDGE PORTIONS BEING FREE AND FORMING THE FRONT EDGE OF THE SEAT AND THE OTHER SIDE EDGE PORTION THEREOF BEING CONNECTED TO THE LOWER EDGE OF THE BACKREST, AND MEANS SUSPENDING THE SEAT AND BACKREST UNIT FROM THE FRAME, SAID MEANS INCLUDING INTERENGAGING MEANS BETWEEN THE BACKREST ADJACENT THE UPPER EDGE THEREOF AND THE BACK MEMBER OF THE FRAME AND A PAIR OF INTERENGAGING MEANS LOCATED AT THE END EDGE PORTIONS OF THE SEAT AND CONNECTING THE SAME TO THE ARM PORTIONS OF SAID FRAME, SO THAT SAID COMBINED FLEXIBLE SEAT AND BACKREST UNIT IS MOUNTED IN FREE SUSPENDED CONDITION FROM THE BACK MEMBER AND THE TWO ARM PORTIONS OF THE FRAME, THE COMBINED FLEXIBLE SEAT AND BACKREST UNIT BEING COMPLETELY FLEXIBLE THROUGHOUT EXCEPT FOR THE INTERCONNECTING MEANS ON THE BACK OF THE FRAME AND AT THE ARM PORTIONS THEREOF.