US PATENT SUBCLASS 172 / 355
.~.~.~ Alternately usable tools rocked about wheel axis

Current as of: June, 1999
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172 /   HD   EARTH WORKING

329  DF  GUIDED BY WALKING ATTENDANT; SUPPORTED, PROPELLED, OR HELD IN POSITION BY ATTENDANT {7}
351  DF  .~ Guided or propelled by walking attendant and with ground support or draft means {11}
354  DF  .~.~ With wheel {5}
355.~.~.~ Alternately usable tools rocked about wheel axis

DEFINITION

Classification: 172/355

(under subclass 354) Apparatus comprising a plurality of interconnected earth working elements which may only be in ground contact at different times and being connected to pivot on the axis of rotation of the wheel to engage the desired earth working element with the ground.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136, for diverse tools useable alternately only.