US PATENT SUBCLASS 37 / 429
.~.~ With significant apron structure or manipulation

Current as of: June, 1999
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37 /   HD   EXCAVATING

411  DF  SCOOP OR EXCAVATING AND TRANSPORTING CONTAINER {7}
412  DF  .~ Supported on vehicle between longitudinally spaced ground supports {9}
429.~.~ With significant apron structure or manipulation {1}
430  DF  .~.~.~> Actuated by fluid means

DEFINITION

Classification: 37/429

With significant apron structure or manipulation:

(under subclass 412) Apparatus wherein the significance is attributed to the way in which the gate components are arranged or put together to form a particular shape or to the improvement in the operational control of the gate. [figure] [caption]A - Earth; B - Bowl; C - Digging edge; D - Apron mechanism; E - Apron control cable; F - Ground wheels

(1) Note. Apron usually assists in the loading of the bowl, closes the loaded bowl, and is elevated for dumping. The simplest type of apron is a one-piece plate, usually curved, having mounting arms that are pivoted on the bowl side walls so that the lower edge of the apron moves from elevated position to closed position in an arc of a circle struck about the axis formed by the mounting pivot.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424+, for coaction between apron or elevator and bowl.