US PATENT SUBCLASS 37 / 461
CLAMSHELL BUCKET

Current as of: June, 1999
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37 /   HD   EXCAVATING

461CLAMSHELL BUCKET {4}
184  DF  .~> Common pivot {1}
186  DF  .~> Contiguous pivots
187  DF  .~> Spaced pivots
188  DF  .~> Link-connected

DEFINITION

Classification: 37/461

CLAMSHELL BUCKET:

(under the class definition) Apparatus wherein the digging tool consists of two pivotally cooperating digging elements which are adapted to be dropped in the open position into the material to be excavated and then adapted to be closed, thereby encompassing the material between the two elements. [figure] [caption]A - Clamshell bucket; B - Closing line; C - Holding line; D - Boom; E - Tag line; F - Boom hoist rope; G - Track; H - Turntable

SEE OR SEARCH CLASS

294, Handling: Hand and Hoist-line Implements,

86.4+, for a grapple adapted for grasping a load and having a handling or hoist-line terminal.