Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1996-11-06
1998-10-06
Dorner, Kenneth J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 38, 411 39, 411 43, 411 54, 411 55, F16B 1304, F16B 1306
Patent
active
058167617
ABSTRACT:
We achieved extended fatigue endurance and high pre-load in a structural blind fastener by combining the best features of screw type and pull type blind fasteners. We replaced fatigue critical details from the shear plane with close tolerance, slip fit, core bolt and outer bolt shanks to obtain the desired structural load paths while retaining anchoring features of screw type fasteners to introduce adequate pre-load. Our fasteners are compatible with currently available blind bolt insertion tooling. The present invention pertains to a lightweight version of the structural blind fastener wherein we set the backside anchor collar with matching threads that engage between the outer sleeve bolt and inner core bolt.
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Briscoe R. Todd
Cassatt Gary G.
Dorner Kenneth J.
Hammar John C.
Santos Robert G.
The Boeing Company
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