US PATENT SUBCLASS 37 / 395
.~ Boom-type

Current as of: June, 1999
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37 /   HD   EXCAVATING

394  DF  CABLE-OPERATED (E.G., DRAGLINE) {3}
395.~ Boom-type {2}
396  DF  .~.~> Including means to control digging, hoisting, and dumping
397  DF  .~.~> Including mounting or support structure (e.g., boom support, sheave or pulley support)

DEFINITION

Classification: 37/395

Boom-type:

(under subclass 394) Apparatus including an elongated member from which the strand extends to the scoop or bucket. [figure] [caption]A - Vehicle; B - Boom; C - Drag cable; D - Drag bucket

(1) Note. Boom usually consists of a mast, crane body, or other supporting structure.

(2) Note. The boom-type excavator usually has four motions: (a) loading, which is accomplished by pulling the bucket toward the machine with a drag cable attached to the bucket chain; (b) hoisting, which is accomplished by a second cable from the bucket-chain hoist over the boom point sheave; (c) swinging and returning, which are accomplished by interrelated manipulation of the drag cable and the hoisting cable via a gear train; (d) dumping of the bucket, which is controlled by means of an equalizing dump cable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

182, for an excavator having an orange-peel bucket.

341, for a dredger having a tool in the form of a shovel or bucket.

461, for an excavator with a clamshell bucket.

SEE OR SEARCH CLASS 212, Traversing Hoists,

199+, for apparatus having boom including supporting structure; subclasses 255+ for a vertically swinging boom; subclasses 347+ for a subcombination under the class definition including an elongated structural member disclosed as being part of a traversing hoist.

254, Implements or Apparatus for Applying Pushing or Pulling Force,

264+, for apparatus for hauling or hoisting a load, including a driven device which contacts and pulls on cable.

414, Material or Article Handling,

569, for a vertically swinging load support including a hoist or a dragline; subclass 570 for an endless or a rotary carrier and a dragline scoop; subclasses 592+ for an elevator or a hoist with loading and unloading means; subclasses 680+ for a vertically swinging load support.