(under subclass 35) Apparatus in which a tooth, tine or like earth working part is so freely pivotally mounted on a driven rotary carrier that during carrier rotation centrifugal forces cause the free end of said tooth, tine, or like to swing to a radial position relative to the axis of rotation of such carrier.
(1) Note. This definition includes teeth or tines which are freely pivotally connected to a rotary carrier by means of a flexible chain.
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91+, for other teeth, tines or like earth working parts which are movably mounted on a driven carrier, the movement being caused (1) by a drive means or (2) by flexure of a resilient tooth, tine or like earth working part on encountering an overload or (3) by the turning of a rolling blade when the same contacts the ground.