(under subclass 322) Apparatus in which an unstable frame carrying the ground wheel is moved with respect to the ground by the actuator.
(1) Note. For the meaning of "actuator" see the class definition.
(2) Note. It is sometimes difficult to say whether or not a part should be considered a frame carrying the ground wheel or merely a frame carrying an earth working element. The frame carrying the ground wheel is the running gear of the apparatus. If it is shown as supporting a seat for the attendant or directly attached to a hitch means such as a tongue it is considered to be the running gear or "frame" of the definition.
(3) Note. The "unstable frame carrying the gound wheel" of the definition is a frame which relies on a draft connection to a propelling means such as a tractor or horse or on the contact of an earth working tool with the ground to keep it in a fixed position, e.g., a two wheeled frame is unstable while one with more than two wheels on different axes is stable. A frame is considered to be unstable if it is "unstable" in any position of adjustment, e.g., as when an actuator causes a wheel of a stable frame to leave the ground to thereby cause the frame to be of the "unstable" type. See subclasses 395+ for a stable wheeled frame carrying an earth working element, the stable frame being tilted about the axis of a wheel by a vertical adjustment of another wheel relative to the frame.
SEE OR SEARCH CLASS
171, Unearthing Plants or Buried Objects, 109, for an apparatus comprising an unearthing unit on a vehicular break frame.
