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AssigneeBrissonneau et Lotz Marine
InventorsJean Havard, Christian Ravet
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A system and method are provided to facilitate disengagement of two mechanisms engaged with one another with a high stress therebetween, such as in rack locking arrangements used on offshore platforms. The first mechanism (e.g., a rack) is mobile in relation to the second mechanism (e.g., a pair of locking jaws) which serves as a locking mechanism for the first mechanism. The level of stress between the first and second mechanisms is measured, and the measurement is converted into an electrical control signal. This signal is used to control motor-driven force applying elements (e.g., pinions) in engagement with the first mechanism. The force applying elements are controlled in such a manner as to apply force to the first mechanism sufficient to offset the aforementioned stress between the first and second mechanisms, thereby permitting friction-free disengagement of the mechanisms.
A method of facilitating disengagement of a vertically displaceable rack and a locking member of an offshore platform lifting mechanism, the locking member having teeth in locked engagement with complementary teeth of the rack with a high vertical stress between the engaged teeth of the locking member and the rack, the locking member being displaceable transversely away from the rack to disengage therefrom and transversely toward the rack to lockingly engage therewith, said method comprising the steps of:
Dependencies are inferred from the claim text.