Patent ID: 8925695
Filing Date: 2015-01-06
Classification: E05F,E05Y,F16F

Abstract:
1. A progressive damping device for furniture, the progressive damping device comprising: a cylindrical body through which a dynamic fluid circulates, said cylindrical body havinu an interior; and a piston disposed in said interior of said cylindrical body, said piston having a rod extending therefrom and outwardly of said cylindrical body, said piston defining a pair of chambers in said cylindrical body, said pair of chambers for compression during damping and for expansion, said pair of chambers each having a variable volume relative to a position of said piston, said piston having a cylindrical, sleeve which contains a displaceable valve having symmetrical resilient fins with a total radial dimension that is greater than an inner diameter of an interior annular projection of said cylindrical sleeve, a longitudinal position of said symmetrical resilient fins when not flexed is such that a distance of said symmetrical resilient tins to a wall which closes a head of said elastoplastic valve is greater than a distance between an active side of said interior annular projection and a seating wall of said cylindrical sleeve, said symmetrical resilient fins reaching said active side of said interior annular projection before said wall that closes said head of said elastoplastic valve abuts said seating wall of said cylindrical sleeve.