Patent ID: 7073860

Claim:
A chair having a reclinable seat comprising in combination two supporting side frames, each side frame having at least one substantially horizontal member and substantially vertical leg members, said frames disposed in a spaced apart relationship by cross-rails, a seat disposed within said frames further having an upholstered bottom board and an upholstered back board connected together, the bottom board having front and rear edges, further comprising: means for supporting said seat including (1) a plurality of concentric circular ring sector shaped slots located on said horizontal members, and (2) a plurality of plastic runners connected to said seat bottom board and sliding in said slots; said slots having end surfaces, the centers of said circular slots defining a virtual transverse axis of rotation of the seat; a lining material covering the lower paths of the slots; the slot paths having detent means to moveably engage with corresponding detent means located on the runners; a plurality of runners moveably engaged into said slots and attached onto brackets that are securely connected to the bottom board, the runners having complementary surfaces with the lower paths of the slots, the runners having end surfaces that engage said ends of the slots; springs attached at one end to the horizontal members and at an opposite end to the bottom board forcing the runners against one of the ends of the slots, and cover plates fastened to the horizontal members having circular ring sector shaped slots concentric with the axis of rotation of the seat, the runners moveably engaged with respect to the slots of the cover plates, the ends of the slots having surfaces that stop the rotation of the runners.