(under subclass 35) Apparatus in which a power drive to an earth working element is periodically interrupted.
(1) Note. Such intermittent drives generally employ mutilated or interrupted gears or cam operated drive clutches.
SEE OR SEARCH THIS CLASS, SUBCLASS:
36, for subsurface shears or nippers which comprise earth working portions which are periodically brought into engagement one with the other and then separated in order to cut or pinch subsurface material or growth, the means for imparting such movement generally being a power drive which is periodically interrupted.
40, for a vibrating earth working element.
90, for an apparatus supported by an irregular or off center ground wheel or support which gives an intermittent motion to an earth working element.
