Assembly with relatively displaceable members

Claim 1

AN ASSEMBLY COMPRISING TWO TELESCOPED CYLINDRICAL MEMBERS CONTACTING EACH OTHER OVER AN EXTENDED SURFACE DEFINED BY THEIR RESPECTIVE PERIPHERIES, SAID MEMBERS BEING RELATIVELY AXIALLY DISPLACEABLE ALONG SAID SURFACE; ONE OF SAID MEMBERS BEING PROVIDED WITH A RELATIVELY DEEP ANNULAR PERIPHERAL RECESS, THE OTHER OF SAID MEMBERS BEING PROVIDED WITH A RELATIVELY SHALLOW ANNULAR PERIPHERAL RECESS, SAID RECESSES BEING ALIGNABLE WITH EACH OTHER IN A PREDETERMINED RELATIVE AXIAL POSITION OF SAID MEMBERS, AND A RESILIENT COUPLING RING IN SAID RELATIVELY DEEP RECESS FULLY RETRACTABLE INTO SAME BUT ELASTICALLY BIASED IN RADIAL DIRECTION TOWARD SAID RELATIVELY SHALLOW RECESS; SAID REBEING ONLY PARTLY RECEIVABLE IN THE LATTER RECESS; SAID RECESSES HAVING TWO PAIRS OF MUTUALLY OPPOSITE FLANKS BEARING ON SAID RING UPON RELATIVE AXIL DISPLACEMENT OF SAID MEMBERS IN A FIRST AND SECOND DIRECTION, RESPECTIVELY, WITH A RESULTANT CAMMING FORCE WHICH WITH SAID FIRST DIRECTION OF DISPLACEMENT HAS A RADIAL COMPONENT DIRECTED TOWARD THE MEMBER HAVING SAID RELATIVELY DEEP RECESS BUT LACKS SUCH COMPONENT WITH SAID SECOND DIRECTION OF DISPLACEMENT WHEREBY SAID RING LOCKS SAID MEMBERS AGAINST FURTHER AXIAL DISPLACEMENT IN SAID SECOND DIRECTION BEYOND SAID PREDETERMINED RELATIVE POSITION THEREOF.