Blind fastener with large bearing area

Details Blind fastener with large bearing area Blind fastener with large bearing area

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 19/10 (2006.01)

Patent

CA 2066681

2066681 9105172 PCTABS00004 A blind fastener (10) for fastening workpieces (38, 40) of a crushable or composite material and which provides a blind head (66) having a large bearing area against the adjacent blind side (62) of the workpieces (38, 40) and having a main sleeve (14) with a tapered nose (32) and an expandable sleeve (16) with the expandable sleeve (16) having a primary section (46) and a secondary section (48) with the secondary section (48) having a wall of reduced cross-sectional area and of a lower hardness and/or material strength than the primary section (46) such that after the secondary section (48) has moved past and been expanded over the tapered nose (32) the leading end (58) of the primary section (46) will substantially not move radially inwardly as it is moved over the tapered nose (32) and at a preselected axial or column load the secondary section (48) will substantially fold or collapse to form the blind head (66) with a large bearing area while the primary section (46) will substantially not buckle whereby the pin (12) can provide a visual and/or measurable indication that the fastener (10) has been installed in a proper grip condition.

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