Title: Apparatus for excavation and earth removal from aquatic bottoms

Abstract: A floatable apparatus provided with a lifting element for displacing it between the surface and bottom of a water basin has at least two jaws or grippers which are suitable for use as a clam-shell bucket or the like. The jaws are suspended from the lifting element and are articulated with respect to one another. The lifting element is constituted by a principal floatable buoyant caisson which permits the apparatus to be placed in a state of immersion or of floatation. At least one floatation chamber is associated with each of the jaws to achieve selectably a net density thereof equal to, less than or greater than that of water. The jaws are carried by the principal caisson.

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Inventors: Lespinasse, Pierre

Application Number: 759976
Filing Date: 1977-01-17
Publication_date: 1979-04-24
Assignee:
Primary Class(es): 37/309 37/313, 37/340, 114/53, 114/55, 414/23
Other Classes:
US Patent Ref:

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Other Refs: 175998111372584527 OF136188145268312712306046

Jul, 1971	DE
Jan, 1957	FR
, 1878	GB
Dec, 1919	GB
Jul, 1920	GB
Jun, 1929	GB
Aug, 1971	SU

Primary Examiner: Crowder, Clifford D.
Assistant Examiner:
Attorney: Greigg; Edwin E.