Fastening device

Claim 1

A FASTENING DEVICE COMPRISING A NIPPLE HAVING AT ONE END AN ABUTMENT SHOULDER AND AT THE OTHER END TWO PARALLEL PROJECTING FINGERS EACH DEFINING A LONGITUDINAL GUIDE TRACK IN OPPOSITE PORTIONS OF SAID FINGERS, AN OBLONG MEMBER BEING MOUNTED BETWEEN SAID FINGERS AND HAVING OPPOSITELY PROJECTING GUIDING MEANS DEFINING PERPENDICULAR TO THE AXIS OF SAID NIPPLE A TRANSVERSE PIVOT AXIS FOR SAID OBLONG MEMBER, SAID GUIDING MEANS SLIDABLY RECEIVED IN SAID TRACKS TO RETAIN SAID OBLONG MEMBER BETWEEN SAID FINGERS FOR PIVOTAL MOVEMENT BETWEEN A FIRST POSITION IN WHICH SAID OBLONG MEMBER IS APPROXIMATELY ALIGNED WITH SAID NIPPLE AXIS AND A SECOND POSITION IN WHICH SAID OBLONG MEMBER EXTENDS TRANSVERSELY OF SAID NIPPLE AXIS AND PROJECTS LATERALLY OF SAID FINGERS, SAID OBLONG MEMBER HAVING A TRANSVERSE THREADED BORE WHICH IS ALIGNED WITH THE AXIS OF SAID NIPPLE WHEN SAID OBLONG MEMBER IS IN SAID TRANSVERSE POSITION AND IS ENGAGEABLE BY LEADING A THREADED SCREW THROUGH THE BORE OF SAID NIPPLE BY MEANS OF WHICH SCREW THE OBLONG MEMBER FROM SAID SECOND POSITON MAY BE GIVEN A TRANSLATORY MOVEMENT TOWARDS SAID ABUTMENT SHOULDERS AND LENGTHWISE OF SAID FINGERS TO A THIRD POSITION, EACH OF SAID SLOTS HAVING FIRST AND SECOND RESTRICTED PORTIONS, TRANSVERSE DIMENSIONS OF WHICH ARE SLIGHTLY LESS THAN THE TRANSVERSE DIMENSION OF SAID GUIDING MEANS, SAID FIRST RESTRICTED PORTIONS BEING DISPOSED INTERMEDIATE THE ENDS OF THE TRACKS AND PREVENTING THE OBLONG BODY FROM MOVEING BACK FROM ITS THIRD TOWARDS ITS SECOND POSITION IN RESPONSE TO THE PRESSURE NORMALLY APPLIED BY SCREWING ANOTHER SCREW INTO THE THREADED BORE OF SAID OBLONG MEMBER, AFTER UNSCREWING THE FIRST MENTIONED SCREW, AND SAID SECOND RESTRICTED PORTIONS BEING DISPOSED IN JUXTAPOSTION TO THE ENDS OF THE TRACKS REMOTE FROM SAID ABUTMENT SHOULDER AND PREVENTING SLIDING OF SAID GUIDING MEANS WHEN SAID OBLONG MEMBER IS PIVOTALLY MOVED FROM ITS FIRST TO ITS SECOND POSITION, THE IMPROVEMENT COMPRISING A PASSAGE THROUGH THE WALL OF THE NIPPLE, AND A DRAWING MEANS ONE END OF WHICH IS SECURED TO THE OBLONG MEMBER AT A POINT TRANSVERSELY SPACED FROM SAID PIVOT AXIS WHEN SAID OBLONG MEMBER IS IN ITS SECOND POSITION, THE OTHER, FREE END OF SAID DRAWING MEANS EXTENDING THROUGH SAID PASSAGE, WHEREBY SAID OBLONG MEMBER MAY NE PIVOTALLY MOVED FROM ITS SECOND TO ITS FIRST POSITION BY GRIPPING AND DRAWING SAID FREE END OF THE DRAWING MEANS.