Fastening bolt assembly providing both axial and radial holding

Details Fastening bolt assembly providing both axial and radial holding Fastening bolt assembly providing both axial and radial holding

1992-05-29

1992-11-17

Lindsey, Rodney M.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Headed fastener element with nut, washer, securing means or cap

Securing means pivotable about axis transverse to fastener...

411371, 411915, F16B 2100

Patent

active

051637960

ABSTRACT:
A tubular and preferably elastomeric radial holding and centering expandable bushing having a bore sized to pass a threaded shank of a fastening bolt and having a radially enlarged flanged one end thereof. The bore tapering outwardly toward the periphery to create a conical cavity between the bushing body from the flange rearwardly. The cavity receives a tubular expansion insert having a tapered periphery and internal bore slightly larger than the diameter of the threaded shank of the fastening bolt which insert is positioned to the side of the tubular bushing remote from the head of said fastening bolt. A folding wing nut structure includes a trunion nut having a tapped bore threaded on said shank of the bolt, axially outwardly of the tubular expansion insert to the side opposite to the tubular bushing. The structure includes a pair of foldable wings. Tightening down of the fastening bolt against a load mounted between the head of the fastening bolt and the outer surface of a wall having a blind hole sized to and receiving the body of the tubular bushing causes the trunion nut to move towards the tubular expansion insert and to drive the expansion insert into the conical cavity radially expanding the bushing to exert radial holding forces on the wall about the periphery of the blind hole. The open wings of the folding wing nut structure abut the rear face of the wall to create axial forces tending to fixedly mount the object against the front surface of the wall.

REFERENCES:
patent: 2771262 (1956-11-01), Laystrom
patent: 3778539 (1973-12-01), Baier

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