Improved spring hinge with a damper

Claim 1

- SPRING HINGE WITH A DAMPER, IMPROVED, which, be­ing made up by two cylindrical bodies, respectively soli­darized with the anchoring blades to door and frame, is essentially characterized in that one of the cylindrical bodies constitutes a tight chamber, through closure caps on its ends, inside which there exists a piston, lateral­ly related with the cylinder through longitudinal guides which hinder the rotation of the piston, whilst at the same time said piston presents an axial central threaded pitch, through which it remains mounted in its spindle with am ample thread pitch, which spindle is made up by the extremity of an axial shaft which passes through a central perforation of one of said closure caps of said tight chamber, which perforation determines a seat for an axial retention ring of said shaft, among tightness couplings, said shaft passing through a cylindrical bush­ing, outerly anchored to said cap, which bushing acts si­multaneously as a complement of tight closure and as a complement of axial retention of said ring of the shaft, as a rotation gudgeon of the second cylindrical body of the hinge and as an anchoring means, by welding, of the end of a helicoidal cylindrical spring, set forth coax­ially to said shaft, being the opposite end of this spr­ing joined by welding to the disc of a circular crown, which external teeth perform an axial coupling against the inner front part of a closure cap of the end of the second cylindrical body of the hinge, whilst an inner indention of said circular crown performs a radial cou­pling with a ring, laterally striated, of said shaft, the latter passing through an ample axial perforation of said closure cap, and the threaded extremity of the shaft overlapping through a central perforation of a second cap of axial action of the cylinder, where a nut performs the retention and axial mounting of the second cylindrical body of the hinge against the rotation gud­geon of the first cylindrical body, there remaining inter­posed between both an axial friction washer, thus result­ing that the rotation of the second cylindrical body of the hinge, by coupling of its blade corresponding, for instance, to the door, performs a torsion effort of the spring, whilst at the same time a rotation of the central shaft which will transmit to the piston of the first cy­lindrical body of the hinge an axial movement, said pis­ton presenting axial bypass valves, combined thin perfo­rations which perform a dampering action in the recuper­ation of the torsion spring or closure of the hinge, fa­vouring the sense of valve opening the opening of the hinge, in the occupation of the tight chamber of the fir­st cylindrical body of the hinge by an oleohydraulic flu­id, the capacity of this tight chamber being regulated by a piston-cap threaded to a central perforation of the cl­osure cap of the free end of the first cylindrical body of the hinge, with the particularity that it has been pro­vided that said circular crown be provided with an axial neck, externally faceted, which is housed in the ample central perforation of the closure cap, to allow, by dis­coupling of said external nut and second cap, the actua­tion of a tubular key, which after the axial compression of the spring and rotation of the circular crown, regul­ates the stress, of torsion of the spring in the new ax­ial coupling of the circular crown.