(under subclass 618) Grab devices having cooperating jaw portions similar in shape to the two halves of a clamshell which are relatively movable to provide a grapple type of bucket.
SEE OR SEARCH CLASS
37, Excavating,
340, or 341 for clamshell bucket type dredgers, and subclass 461 for clamshell buckets, per se.
212, Traversing Hoists, all subclasses entitled "grab", for clamshell bucket type of grabs constituting the load engaging portion of various types of traversing hoists.
