Fastening system

Abstract

Abstract A FLAT FIRST MEMBER HAS TWO MAJOR SURFACES AND IS PROVIDED ON ITS LEADING END PORTION WITH CUTTING EDGES. FOR DRILLING HOLES IN A SUPPORT STRUCTURE. A PAIR OF ELONGATED RIBS ARE EACH PROVIDED ON ONE OF THE MAJOR SURFACES EXTENDING BETWEEN THE TRAILING AND LEADING END PORTION OF THE FIRST MEMBER AND LOCATED AT OPPOSITE SIDES OF A CENTER LINE CONNECTING THE END PORTIONS. THE RIBS HAVE RESPECTIVE INNER EDGES WHICH FACE TOWARDS THE CENTER LINE AND WHICH COVERGE OVER AT LEAST A PART OF THEIR LENGTH AT AN ACUTE ANGLE TOWARDS THE LEADING END PORTION. AN ELONGATED SECOND MEMBER HAS A FRONT PORTION AN AXIAL SLOT OF WHICH CAN MATING BUT RELEASABLY RECEIVE AT LEAST THE TRAILING END PORTION OF THE FIRST MEMBER SO THAT WHEN BY ENGAGEMENT OF THE REAR PORTION OF THE SECOND MEMBER WITH A TOOL THE TWO MEMBERS ARE JOINTLY ROTATED, THE CUTTING EDGES OF THE FIRST MEMBER WILL DRILL A HOLE IN THE SUPPORT STRUCTURE WHEREUPON THE SECOND MEMBER IS RELEASED FROM THE FIRST MEMBER IS INSERTABLE INTO THE HOLE. AN ELONGATED THIRD MEMBER IS INSERTABLE INTO THE THUS-DRILLED HOLE AND HAS AN EXPANDABLE PORTION PROVIDED WITH AN AXIAL SLIT SO CONFIGURATED THAT WHEN IT RECEIVES FORCIBLY THE TRAILING END PORTION OF THE FIRST MEMBER, IT IS SPREAD APART IN LOCKING ENGAGEMENT WITH THE MATERIAL OF THE SUPPORT STRUCTURE SURROUNDING THE HOLE. THE OPPOSIDE END OF THE THIRD MEMBER IS CONFIGURATED AS A THREADED FASTENING PORTION WHICH PROJECTS FROM THE HOLE AND TO WHICH AN OBJECT MAY BE SECURED. D R A W I N G

Inventors

• 👤 A Fischer

Bibliographic Details