Wherein the rake swings upwardly to discharge the raked material and moves in the same direction about its axis to return to its original position.
(1) Note. There are usually two or more sets of rake-teeth which are successively thrown into raking position. While one set of teeth is in raking position the other remains inoperative.
SEE OR SEARCH CLASS
172, Earth Working,
237, and the subclasses there noted, for an earth working tool swung around an axis intermittently due to draft force.
