Ships – Vessel raising and docking – Submerged
Patent
1979-10-05
1981-07-07
Basinger, Sherman D.
Ships
Vessel raising and docking
Submerged
114123, 114125, B63C 708
Patent
active
042768462
ABSTRACT:
An apparatus for use in recovering an article at least partially submerged in water comprises at least two floatable members each having an arm mounted thereon and whose buoyancy can be varied, each arm carrying a recovery member having gripping or scooping means. A pivot interconnects said arms so that their motion opposes that of the recovery members. A locking device for progressively and releasably locking the arms with respect to each other is provided such that on release thereof the pivot moves downwardly by gravity, causing the recovery members to come together in a caliper-like action. Pressure sensing means in recovery members feeds back information to the locking device to cause the arms to lock and prevent an increase in pressure is attained. A further embodiment does not need a locking device. Each of the floatable members is pivotally connected to one of the arms in an upward direction to a maximum elevation, the pivotable floatable members being arranged to stabilize the apparatus when they are elevated against rolling thereof. A further locking device is provided to hold each of the pivotable floatable members at least in the horizontal and in the maximum elevated positions. A method for recovering submerged articles using such an apparatus and a method for adjusting the buoyancy of an apparatus and improving its submerged stability by the use of pivotable floatable members is also disclosed.
REFERENCES:
patent: 863532 (1907-08-01), Hector
patent: 1691738 (1928-11-01), Powell
patent: 2280547 (1942-04-01), Scofield
patent: 3541986 (1970-11-01), Kriedt et al.
patent: 3782317 (1974-01-01), Kriedt et al.
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