Fluid-tight seal between relatively reciprocating elements

Claim 1

A FLUID-TIGHT SEAL BETWEEN TWO SPACES OF DIFFERENT GAS PRESSURES HAVING A SCRAPING ACTION IN ONE DIRECTION COMPRISING THE COMBINATION OF TWO COAXIALLY ARRANGED ELEMENTS CONSTITUTING A SLEEVE SUPPORT AND A ROD RECIPROCATING RELATIVE TO EACH OTHER, A SLEEVE HAVING A CROSSSECTIONAL LENGTH OF AT LEAST THREE TIMES ITS CROSS-SECTIONAL WIDTH, SAID SLEEVE SUPPORT HAVING A FIRST CAVITY THEREIN, SAID SLEEVE SUPPORT HOLDING SAID SLEEVE IN SAID FIRST THEREIN, SAID SLEEVE ENGAGING A PORTION OF THE SURFACE OF SAID ROD WITHOUT PLAY, AT LEAST ONE ELASTIC RING IN SAID FIRST CAVITY EXERTING PRESSURE ON THE SIDE OF THE SLEEVE REMOTE FROM THE SIDE ADJACENT TO THE ROD, SAID SLEEVE BEING CONSTITUTED OF A METAL HAVING AN INNER LINING OF AN ORGANIC MATERIAL, SAID SLEEVE SUPPORT BEING PROVIDED WITH A SECOND CAVITY, A RING IN SAID SECOND CAVITY HAVING A PLURALITY OF PROJECTING, SLIGHTLY RESILIENT FINGERS, THE FREE ENDS OF SAID FINGERS BEARING ON SAID SLEEVE IN A MANNER TO CREATE A FORCE ON SAID SLEEVE AND DIRECTED TOWARDS SAID ROD, SAID SLEEVE BEING SUBJECTED TO ANOTHER FORCE DIRECTED RADIALLY INWARDLY TOWARD SAID ROD, SAID TWO FORCES BEING SO PROPORTIONED THAT UNDER THE ACTION OF A PRESSURE PRODUCED IN THE FLUID BETWEEN THE FACING SURFACES OF SAID ROD AND SAID SLEEVE THE LATTER IS ELASTICALLY DEFORMED AGAINST THE ACTION OF SAID FORCES APPLIED THERETO AND ORIENTED TOWARD SAID ROD.