Adjustable seat frameworks and to seats equipped with such frameworks
AssigneeBertrand Faure France
InventorJoel Canteleux
Life of this patent
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Abstract
An adjustable seat framework includes two frames articulated to one another, termed respectively first and second frames, joined by pivots, the first frame including at least one guide slot and the second frame including at least one associated operating slot, the associated guide and operating slots emerging in neighboring parallel planes and extending longitudinally in non-parallel directions, the adjustable framework further including, for each set of associated guide and operating slots, a roller which penetrates into said slots. An operating mechanism is provided for shifting the roller along the guide slot, which causes the rotation of the second frame about the pivots.
Claims9
An adjustable seat framework including first and second frames articulated to one another, the second frame being rotatively mounted on the first frame by means of pivots, the seat framework having two sets of associated guide and operating slots, each of said sets of slots including at least one of said guide slots being positioned in the first frame, and at least one of said operating slots being positioned in the second frame, the associated guide and operating slots being formed in neighboring parallel plates, said associated guide and operating slots extending longitudinally in non-parallel directions, the adjustable framework further including two rollers interacting respectively with the two sets of associated guide and operating slots, each corresponding roller penetrating simultaneously into one set of said associated guide and operating slots, to impose an angular position on the second frame relative to the first frame, the adjustable framework further including a link rod joining the two rollers together and an operating mechanism acting on said link rod in order to shift said rollers along the guide slots and to entrain rotation of the second frame about the pivots, the guide and operating slots being arranged so that a load exerted on the second frame does not cause the rollers to slip in the slots, irrespective of the operating mechanism.
A seat backrest comprising a lower part, and an upper part adjustable relative to said lower part, said upper and lower parts having two sets of associated guide and operating slots, said lower part comprising a first frame including at least one of said guide slots, said upper part comprising a second frame including at least one of said operating slots, the second frame being rotatively mounted on the first frame by means of pivots the associated guide and operating slots being formed in neighboring parallel plates, said associated guide and operating slots extending longitudinally in non-parallel directions, the seat backrest further including two rollers interacting respectively with the two sets of associated guide and operating slots, each roller penetrating corresponding simultaneously into one set of said associated guide and operating slots, to impose an angular position on the second frame relative to the first frame, the seat backrest further including a link rod joining the two rollers together and an operating mechanism acting on said link rod in order to shift said rollers along the guide slots and to entrain rotation of the second frame about the pivots, the guide and operating slots being arranged so that a load exerted on the second frame does not cause the rollers to slip in the slots, irrespective of the operating mechanism.
Dependencies are inferred from the claim text.