Abstract: A seating unit comprising a main support having a pair of spaced apart side supports connected by transverse cross beams and a seat subassembly, including an internal frame with back cushion and seat cushion support portions secured on the main support by a concealed mounting means. The concealed mounting means is characterized by a pair of spaced apart upper tenon mounting mortises located internally on the main support. A pair of spaced apart upper tenons are secured on the back cushion support portion and located to be positioned in the upper mortises when the seating unit is in an assembly condition. A pair of spaced apart lower tenon mounting mortises are located internally on the main support. A pair of spaced apart lower tenons are secured on the seat cushion support portion and located to be positioned on the lower tenon mounting mortises when the seating unit is it in an assembled condition. Concealed threaded fastening devices are used to secure each of the tenons in its respective mortise.

Abstract: A seating unit such as a chair or sofa comprises opposite, upright, rigidly connected side members, a reversible seat cushion having a back face and a reversible back cushion having a bottom face. A beam extending laterally between the side members has its ends rigidly connected to them and supports rod-like forwardly projecting cantilevered legs for the seat cushion and similar upwardly projecting legs for the back cushion. The legs for each cushion are lengthwise slidably received in bores in an internal frame of the cushion that extend inwardly from said face of the cushion. Deep inside each bore is a detent device which is engaged by full installation of the cushion on its legs and which releasably locks the cushion against outward movement on its legs. Each detent device is released by inserting a long, slender splint-like tool into the bore.