Bushing with rib and shoulder means

Claim 1

A DEVICE OF THE TYPE DESCRIBED FOR CONNECTING FIRST WORKPIECE HAVING A SHANK ELEMENT WITH A SECOND WORKPIECE HAVING AN APERTURE THERETHROUGH, SAID DEVICE COMPRISING A MEMBER HAVING A SHANK PORTION FOR EXTENDING THROUGH THE WORKPIECE APERTURE, AND A HEAD PORTION INTEGRAL WITH A TRAILING END OF SAID SHANK PORTION FOR OVERLYING ONE SIDE OF THE APERTURED WORKPIECE, MEANS PROVIDING A BORE EXTENDING THROUGH SAID HEAD PORTION AND INTO SAID SHANK PORTION FOR RECEIVING SAID SHANK ELEMENT OF THE FIRST WORKPIECE, SAID MEMBER HAVING GENERALLY AXIALLY EXTENDING SLOT MEANS TRANSVERSING SAID HEAD AND SHANK PORTION AND TERMINATING SHORT OF THE ENTERING SHANK EXTREMITY, SAID SHANK PORTION INCLUDING A FIRST SECTION ADJACENT SAID HEAD PORTION INTERSECTED BY SAID SLOT MEANS AND HAVING A PREDETERMINED OUTER DIAMETER, A PLURALITY OF CIRCUMFERENTIALLY SPACED GENERALLY LONGITUDINALLY EXTENDING, RELATIVELY NARROW, RADIALLY DEFORMABLE RIBS ON AND PROJECTING LATERALLY OF SAID FIRST SECTION TO A LIMITED EXTENT FOR ENABLING THE DEVICE TO FIT SNUGLY WITHIN THE WORKPIECE APERTURES OF VARIOUS DIAMETERS, MEANS ON SAID SHANK PORTION PROVIDING LATERALLY EXTENDING RELATIVELY RIGID SHOULDER MEANS SPACED A PREDETERMINED DISTANCE FROM SAID HEAD AND LOCATED SUBSTANTIALLY AT ENTERING ENDS OF SAID RIBS FOR PROJECTING BEHIND THE APERTURED WORKPIECE WHEN THE DEVICE IS APPLIED THERETO, SAID SHOULDER MEANS INTEGRALLY JOINED WITH AND EXTENDING CIRCUMFERENTIALLY FROM OPPOSITE SIDES OF A COMPLEMENTARY RIB, THE CIRCUMFERENTIAL EXTENT OF SAID SHOULDER MEANS BEING SUBSTANTIALLY GREATER THAN THE CIRCUMFERENTIAL WIDTH OF SAID RIB WHEREBY TO PROVIDE THE REQUIRED SUPPORT FOR SAID RIB, SAID RIBS BEING DEFORMABLE AND ALSO PROVIDING SHOULDER MEANS ENGAGEABLE BEHIND THE APERTURED WORKPIECE WHEN THE APERTURED WORKPIECE HAS A THICKNESS LESS THAN SAID PREDETERMINED DISTANCE, SAID SHOULDER MEANS PROVIDING A RIGID SHOULDER SURFACE HAVING A DIAMETER AT LEAST SUBSTANTIALLY AS GREAT AS A DIAMETER OF A CIRCLE DEFINED BY RADIALLY OUTER EDGES OF SAID RIBS FOR ENABLING SAID LAST NAMED MEANS TO PROTECT SAID RIBS AGAINST PREMATURE DEFORMATION DURING APPLICATION OF THE DEVICE TO THE APERTURED WORKPIECE, AND MEANS PROJECTING INWARDLY FROM A WALL OF SAID BORE IN THE VICINITY OF SAID RELATIVELY RIGID SHOULDER SURFACE AND ENGAGEABLE IN A RECESS PROVIDED IN SAID SHANK ELEMENT FOR POSITIVELY RESISTING WITHDRAWAL OF THE SHANK ELEMENT FROM THE BORE.

Claim 2

A DEVICE OF THE TYPE DESCRIBED FOR CONNECTING FIRST WORKPIECE HAVING A SHANK ELEMENT WITH A SECOND WORKPIECE HAVING AN APERTURE THERETHROUGH, SAID DEVICE COMPRISING A MEMBER HAVING A SHANK PORTION FOR EXTENDING THROUGH THE WORKPIECE APERTURE, AND A HEAD PORTION INTEGRAL WITH A TRAILING END OF SAID SHANK PORTION FOR OVERLYING ONE SIDE OF THE APERTURED WORKPIECE, MEANS PROVIDING A BORE EXTENDING THROUGH SAID HEAD PORTION AND INTO SAID SHANK PORTION FOR RECEIVING SAID SHANK ELEMENT OF THE FIRST WORKPIECE, SAID MEMBER HAVING GENERALLY AXIALLY EXTENDING SLOT MEANS TRANSVERSING SAID HEAD AND SHANK PORTION AND TERMINATING SHORT OF THE ENTERING SHANK EXTREMITY, SAID SHANK PORTION INCLUDING A FIRST SECTION ADJACENT SAID HEAD PORTION INTERSECTED BY SAID SLOT MEANS AND HAVING A PREDETERMINED OUTER DIAMETER, A PLURALITY OF CIRCUMFERENTIALLY SPACED GENERALLY LONGITUDINALLY EXTENDING, RELATIVELY NARROW, RADIALLY DEFORMABLE RIBS ON AND PROJECTING LATERALLY OF SAID FIRST SECTION TO A LIMITED EXTENT FOR ENABLING THE DEVICE TO FIT SNUGLY WITHIN THE WORKPIECE APERTURES OF VARIOUS DIAMETERS, MEANS ON SAID SHANK PORTION PROVIDING LATERALLY EXTENDING RELATIVELY RIGID SHOULDER MEANS SPACED A PREDETERMINED DISTANCE FROM SAID HEAD AND LOCATED SUBSTANTIALLY AT ENTERING ENDS OF SAID RIBS FOR PROJECTING BEHIND THE APERTURED WORKPIECE WHEN THE DEVICE IS APPLIED THERETO, SAID SHOULDER MEANS INTEGRALLY JOINED WITH AND EXTENDING CIRCUMFERENTIALLY FROM OPPOSITE SIDES OF A COMPLEMENTARY RIB, THE CIRCUMFERENTIAL EXTENT OF SAID SHOULDER MEANS BEING SUBSTANTIALLY GREATER THAN THE CIRCUMFERENTIAL WIDTH OF SAID RIB WHEREBY TO PROVIDE THE REQUIRED SUPPORT FOR SAID RIB, SAID RIBS BEING DEFORMABLE AND ALSO PROVIDING SHOULDER MEANS ENGAGEABLE BEHIND THE APERTURED WORKPIECE WHEN THE APERTURED WORKPIECE HAS A THICKNESS LESS THAN SAID PREDETERMINED DISTANCE, SAID SHOULDER MEANS PROVIDING A RIGID SHOULDER SURFACE HAVING A DIAMETER AT LEAST SUBSTANTIALLY AS GREAT AS A DIAMETER OF A CIRCLE DEFINED BY RADIALLY OUTER EDGES OF SAID RIBS FOR ENABLING SAID LAST NAMED MEANS TO PROTECT SAID RIBS AGAINST PREMATURE DEFORMATION DURING APPLICATION OF THE DEVICE TO THE APERTURED WORKPIECE, AND MEANS PROJECTING INWARDLY FROM A WALL OF SAID BORE IN THE VICINITY OF SAID RELATIVELY RIGID SHOULDER SURFACE AND ENGAGEABLE IN A RECESS PROVIDED IN SAID SHANK ELEMENT FOR POSITIVELY RESISTING WITHDRAWAL OF THE SHANK ELEMENT FROM THE BORE.