Seafloor attachment bolts

Details Seafloor attachment bolts Seafloor attachment bolts

1980-05-22

1982-02-09

Britts, Ramon S.

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

Having separate expander means

Including sleeve and distinct tapered expander

411 70, 411361, F16B 1306

Patent

active

043147844

ABSTRACT:
A fastener assembly for securing structures to the seafloor including a st of circular cross-section having a frusto-conically shaped head on a leading end for insertion into a prepared borehole and a mandril section at the other end having annular grooves around its perimeter. An expansible sleeve is disposed around the shaft in interference fit with the borehole so that when the shaft is pulled upward, the head will force the expansible member to expand against the sides of the borehole. The shaft is disposed with the grooved section extending through an aperture in a workpiece and a malleable collar is positioned around the shaft resting on the workpiece. A conventional blind riveting installation tool may be used to pull the shaft upward to engage the expansible sleeve in the borehole and to swage the malleable collar to the grooved shaft against the workpiece.

REFERENCES:
patent: 1031462 (1912-07-01), Paine
patent: 2531048 (1950-11-01), Huck
patent: 3139786 (1964-07-01), Ardell
patent: 3296919 (1967-01-01), Williams
patent: 3515028 (1970-06-01), Patton
patent: 3709089 (1973-01-01), Seetaram
patent: 3766819 (1973-10-01), Giannuzzi
patent: 4094223 (1978-06-01), Fischer

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