Patent ID: 6416058
Filing Date: 2002-07-09
Classification: F16J

Abstract:
A continuous mechanical packing seal with a packing seal lip placed in a slot of generally toroidal shape located in a first part which is mobile relative to a second part;the packing seal lip bearing on the second part so as to ensure the sealing between the packing seal and the second part; said packing seal comprising: pressure compensation means for producing, under the effect of a pressure variation, a distortion of the packing seal causing a slight motion of the packing seal lip bearing on the second part so as to maintain essentially constant the bearing force of the lip on said second part; and wherein the packing seal is essentially toroidal with a section in the shape of a reverse L having a vertical portion and a horizontal portion; the horizontal portion of the reverse L having an upper face; the vertical portion of the reverse L forming the packing seal lip; and the horizontal portion of the reverse L being distortable under pressure so as to obtain said slight motion; the packing seal comprising means for ensuring the sealing between the upper face of the horizontal portion of the reverse L and of the slot; said slot including a recess, the extremities of the horizontal portion of the reverse L bearing on the edges of said recess so that a pressure variation leads to a flexion of the horizontal portion of the reverse L, which causes a rotating displacement of the packing seal lip.