Push-in assembly and fastener therefor

Claim 1

A FIXTURE-SUPPORTING ASSEMBLY COMPRISING: A SUPPORTING PLATE HAVING A HOLE THROUGH IT; A FIXTURE ON ONE SIDE OF THE PLATE, THE FIXTURE HAVING A RECESS WHICH OVERLAPS THE HOLE IN THE PLATE; A STUD ATTACHED TO THE FIXTURE AND EXTENDING FROM WITHIN SAID RECESS IN AN AXIAL DIRECTION TRANSVERSE TO SAID PLATE; AND A SPRINGY SHEET-METAL FASTENER LOCATED GENERALLY ON THE OTHER SIDE OF SAID PLATE AND COMPRISING (A) A SUBSTANTIALLY CYLINDRICAL, SHEET-METAL BAND HAVING SPACED EDGES, AND (B) A PLURALITY OF INDIVIDUAL SPRING LEGS INTEGRAL WITH SAID BAND AND EXTENDING FROM ONE EDGE THEREOF IN SUBSTANTIALLY THE SAME AXIAL DIRECTION AS SAID BAND; THE STUD OF SAID FIXTURE PASSING THROUGH THE HOLE IN THE PLATE AND CONTINUING BEYOND THE PLATE BETWEEN THE LEGS AND INTO THE BAND OF SAID FASTENER; THE AXIS OF SAID BAND BEING SUBSTANTIALLY COINCIDENT WITH THE AXIS OF SAID STUD WITH THE INNER SURFACE OF SAID BAND EMBRACING THE STUD AT A LOCATION REMOTE FROM SAID PLATE; SAID BAND BEING SPACED FROM SAID PLATE BY SAID LEGS, SAID LEGS BEING DISTRIBUTED ABOUT THE CIRCUMFERENCE OF THE BAND, BEING INDIVIDUALLY DEFLECTABLE, EXTENDING LENGTHWISE OF THE STUD THROUGH THE HOLE IN SAID PLATE, AND HAVING THEIR FREE ENDS IN CIRCUMFERENTIALLY-SPACED RELATION IN THE RECESS IN THE FIXTURE; AT LEAST SOME OF THE LEGS HAVING INWARDLY PROJECTING BARBS LOCATED BETWEEN THE PLATE AND SAID BAND WITH THE POINTS OF SAID BARBS IN ENGAGEMENT WITH THE STUD; EACH LEG HAVING AN OUTWARDLY BOWED PORTION ADJACENT TO SAID PLATE, AND EACH LEG BEING IN INWARDLY FORCED ENGAGEMENT WITH THE ADJACENT MARGINAL EDGE OF THE HOLE IN SAID PLATE CAUSING SAID BARBED ENGAGEMENT WITH THE STUD.