HAVING TOOL OVERLOAD SHIFT CONTROLLED BY A FLUID PRESSUREDEVICE:
(under the class definition) Apparatus including (a) an earth working element; (b) means permitting the element to change position with respect to the ground, or with respect to its supporting or propelling means, when it meets an obstacle while being drawn over the ground, and (c) a fluid pressure responsive means (e.g., a hydraulic system) to yieldingly resist the change in position of the element.
(1) Note. The patents classified herein include overload shift mechanisms of the type found in this class, either in subclasses 261+ or subclasses 705+, but also with the recitation of fluid pressure responsive means to control the overload shifting. This subclass is intended to provide a locus for fluid pressure responsive tool overload shift mechanisms.
SEE OR SEARCH CLASS
111, Planting,
151, for a trip mechanism claimed in combination with a planting machine.
