Reclining seat
A reclining seat comprises a fixed supporting frame, a reclining backrest, and a damping device providing, at lower ends of frame elements forming the seat frame, a lever which is revolvingly hinged on a respective pin integral to the supporting frame and which forms a rocker arm which rotates by a prefixed angle from a first position, corresponding to the reclining backrest in erected position, to a second position, corresponding to the reclining backrest in reclined position, a hydraulic cylinder being provided, with respective fastening ends revolvingly connected respectively to said second lever and to the fixed supporting frame in a prefixed position.
1 . A reclining seat comprising:
a fixed supporting frame;
a sitting portion;
a reclining backrest having a backrest frame with two vertical frame elements, arranged each one at a respective side edge of the reclining backrest, and each one thereof being provided with a joint, revolvingly connecting the reclining backrest to the fixed supporting frame, and a respective lower end movable between positions depending upon an erected or reclined state of the reclining backrest;
a damping device comprising, at least at one lower end, a respective lever joined thereto, which is revolvingly hinged, with respect to the fixed supporting frame, around a pin forming a respective hinge integral with the fixed supporting frame, said respective lever implementing a rocker arm, projecting from said hinge, the lever and the rocker arm being stiffly integral with each other, the rocker arm rotating by a pre-fixed angle from a first position, corresponding to the reclining backrest in erected position, to a second position, corresponding to the reclining backrest in reclined position, a hydraulic cylinder being provided, with respective fastening ends revolvingly connected respectively to the rocker arm and to the fixed supporting frame in a prefixed position;
wherein said hydraulic cylinder is fastened to said rocker arm at a respective additional end pin acting as hinge, the additional pin having a fastening cross hole in which a first fastening end of the hydraulic cylinder is inserted, with a tract of threaded rod inserted in a respective cross hole, and an adjusting nut allowing an adjustment with respect to a counterpart.
2 . The reclining seat according to claim 1 , wherein said pin implements a hinge with substantially vertical rotation axis.
3 . The reclining seat according to claim 1 , wherein the fixed supporting frame comprises a pair of horizontal bars, transversal to the seat, arranged on uprights, said hydraulic cylinder being anchored to one of said bars by means of a tightening ring positionable along such cross bar.
4 . The reclining seat according to claim 3 , wherein said hydraulic cylinder is anchored to the rear bar, at said frame ends.
5 . The reclining seat according to claim 4 , wherein said pin is positioned at a prefixed distance from said rear bar, on one arm projecting therefrom in direction of the other front bar.
6 . The reclining seat according to claim 5 , wherein said arm is connected to a respective tightening ring positionable along such rear cross bar.
7 . The reclining seat according to claim 1 , wherein in frame lower end a respective joint is implemented which is connected to a respective control arm which, at one end thereof, is joined to a distal end of said lever thus implementing a kinematic connection joined between frame element of the backrest frame and the damping device.
8 . The reclining seat according to claim 1 , wherein the hydraulic cylinder is of the elastic return type.
9 . The reclining seat according to claim 1 , wherein the damping device is coupled to a stiffening mechanism of the reclining backrest, having the function of preventing the torsion of the backrest frame.
10 . The reclining seat according to claim 1 , wherein the reclining seat is an aeronautical seat.