Pile release mechanism

Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor

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Details

405228, E02B 1702, E02D 500

Patent

active

045765235

ABSTRACT:
A mechanism for releasing a pre-installed pile attached to a pile guide connected to an offshore platform is supported in the pile and includes pile latch means rotatable from a latch position in which one end extends through an opening in the pile and engages the upper end of the pile guide to a retracted unlatched position in which the entire latch means is located within the pile. The inner end of the latch means is connected to a collapsible compression linkage assembly which when in one position maintains the latch means in its latch position and when moving from the one position to another collapsed position causes the latch means to rotate to its unlatched position within the pile. A slide plate capable of causing the linkage assembly to collapse when moving downwardly from a first position to a second position is releasably held in the first position by shearable means. The linkage assembly includes two pairs of linkage arms, one connecting latch pins to the inner end of the latch means and floating pins and the other connecting the floating pins to pivot pins. The slide plate contains inwardly slanting surfaces which engage the floating pins when the slide plate moves downwardly to move the floating pins outwardly and cause collapse of the linkage assembly. The slide plate is released from its first position and moves downwardly by the force of a follower which extends from the surface into the upper end of the pile and engages the upper end of the slide plate.

REFERENCES:
patent: 1581442 (1926-04-01), Hawkins
patent: 2460352 (1949-02-01), Jensen
patent: 3186745 (1965-06-01), Lyles
patent: 3841665 (1974-10-01), Capot
patent: 4322182 (1982-03-01), Ostgaard

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