| 摘要 |
A blind fastener which can be installed by access to one side only of a workpiece (42, 43) comprises a pin (11), a sleeve (21), and an abutment member (32). The pin extends inside the sleeve and engages the sleeve at one end (24). The other end of the sleeve has a radially enlarged head (25). The sleeve is of one piece and has a radially expandable portion. The abutment member is adjacent to the sleeve head and abuts a frangible element (28) of the sleeve head. The sleeve is inserted into an aperture in a workpiece with the expandable portion protruding beyond the blind face (46) of the workpiece and the head abutting the near face (45) of the workpiece. A pulling force is applied to the part of the pin extending beyond the abutment member and the expandable part of the sleeve expands radially to form a blind head (49) against the blind face of the workpiece. The frangible element then breaks and the abutment member moves along the pin. The abutment member is then secured to the pin. |
