A top and bottom disk with central bores axially aligned for receipt of a through bolt fastener. The disks have descending and ascending integral cylindrical tubes respectively. The descending top disk tube has a side wall vertical channel leading to an eccentric hole in the top disk at one end. The inner diameter of the top disk cylindrical tube is slightly larger than the outer diameter of the bottom disk cylindrical tube and receives the bottom disk tube in axial alignment within a through hole in a two-sided honeycomb panel. Ridges on a surface of each disk, in contact with a honeycomb panel side, seal the disk in place after epoxy is inserted into the eccentric hole in the top disk.

Mechanical sandwich panel spacer with improved torque resistant anchorage

Compression fitting for use in a two-sided honeycomb panel

A honeycomb panel with a threaded fastener secured thereto wherein the fastener has a flanged portion (12) abutting the outer surface of the upper plate member of the panel and its bulged portion (17) within the core of the honeycomb panel but cooperative with the flange (12) to captively secure such fastener into the honeycomb panel.

Fasteners for honeycomb structures

Load distributing system for panels incorporating honeycomb core

A fastener insert which develops clamping anchorage to a panel skin by forming a bulbed secondary head in a shell by compression resulting from drawing a nut into the shell under interfering engagement between the two, and secondary anchorage in the panel core by a plurality of petals which are expanded into the core by action of an annular head on the nut as the nut is drawn into the shell.

Double anchoring mechanical sandwich panel fastener insert

An integral hold out spring and built-in stop ring is provided on a threaded bolt. The bolt is adapted to be inserted through a hole in a panel. The hold out spring and built-in stop ring is inserted into a bore in the bolt, the hold out spring portion extending out of a slot in the bolt and the built-in stop ring portion entering a groove adjacent the nose of the bolt. In one embodiment of the invention, a washer having inwardly extending tabs is installed on the shank of the bolt prior to insertion of the built-in stop ring portion, the tabs riding in grooves extending along the outer body of the bolt and stopped in their downward movement by engagement with the built-in stop ring portion.

Mechanical sandwich panel spacer with improved torque resistant anchorage

Citations

Compression fitting for use in a two-sided honeycomb panel

Fasteners for honeycomb structures

Load distributing system for panels incorporating honeycomb core

Double anchoring mechanical sandwich panel fastener insert

Spring form captive panel fastener assembly

References

Press insert having angular knurlings

Blind, self-locking, floating anchor nut

Related Papers (5)

Sandwich panel spacer with torque resistant mechanical anchorage

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