Pull-type blind rivet

Claim 1

A BLIND RIVET ADAPTED TO BE INSERTED FROM THE TOP SIDE AND SET IN ALIGNED APERTURES IN A PLURALITY OF WORK PIECES, COMPRISING: A TUBULAR SLEEVE INCLUDING A SHANK WITH A PLURALITY OF ANGULARLY SPACED AND LONGITUDINALLY EXTENDING SLOTS THAT AFFORD IT WITH A LIKE NUMBER OF TINES, AND A RADIALLY ENLARGED HEAD AT ONE END OF SAID SHANK WITH A LOCKING CROWN THEREIN PROJECTING OPPOSITELY FROM SAID SHANK AND ADPATED TO BUCKLE INWARDLY, EACH OF SAID SLOTS EXTENDING LONGITUDINALLY IN SAID SHANK FROM A POINT ADJACENT SAID SLEEVE HEAD AND TERMINATING ADJACENT THE OPPOSITE END IN A LONGITUDINALLY ALIGNED GROOVE IN THE INNER WALL OF SAID SHANK WHICH IS RELATIVELY SHORT IN RELATION TO THE LENGTH OF ITS SLOT AND WHICH STOPS SHORT OF THE OPPOSITE END OF SAID SHANK, AND END WALL OF EACH OF SAID SLOTS AT THEIR JUNCTION WITH SAID GROOVES AND AN END WALL OF EACH OF SAID GROOVES SLOPING SLIGHTLY TOWARD SAID OPPOSITE END OF SAID SHANK FROM THE OUTER TOWARD THE INNER WALL OF SAID SHANK, SAID SLEEVE BEING ADAPTED TO BE INSERTED INTO THE ALIGNED APERTURES IN SAID WORK PIECES WITH A PORTION OF SAID SHANK PROJECTING FROM THE OPPOSITE BLIND SIDE OF THE SAME; AND A PIN INCLUDING A STEM INITIALLY DISPOSED WITHIN SAID SLEEVE AND OPERATIVELY CONNECTED TO THE SHANK AT THE END THEREOF OPPOSITE SAID HEAD FOR TRANSMITTING A LONGITUDINALLY COMPRESSIVE EXTERIORLY FROM THE HEADED PULLING SECTION PROJECTING EXTERIORLY FROM THE HEADED END OF SAID SLEEVE, SAID STEM BEING FORMED ADJACENT SAID PULLING SECTION WITH A PLURALITY OF ANNULAR LOCKING GROOVES, THE TINES ON SAID PROJECTING PORTION BULBING RADIALLY OUTWARDLY TO FORM PETAL-LIKE PROJECTIONS WHICH PRESSURALLY ENGAGEED THE BLIND SIDE OF THE WORK PIECES AT LOCATIONS TO A LONGITUDINAL COMPRESSIVE FORCE TURES, RESPONSIVE TO A LONGITUDINAL COMPRESSIVE FORCE BEING TRANSMITTED TO SAID OPPOSITE END OR SAID SHANK, SAID STEM HAVING SAID LOCKING GROOVES LOCATED SO THAT AT LEAST ONE SAID GROOVE WILL LIE WITHIN SAID LOCKING CROWN WHEN SAID LOCKING CROWN BUCKLES TO LOCK SAID SLEEVE TO SAID PIN.