Self-propelled/tow-behind, variable width stump cutting machine
US-7398805-B2Abstract
A self-propelled stump cutting apparatus which also functions as a tow-behind type, resultant of a telescoping tongue hitch. The apparatus is narrowed in width, while in work mode with tow wheels suspended above ground by removing the detachable tow wheel assemblies. Self-propulsion is accomplished by the employment of a unique, retractable, hydraulically motivated tractor axle assembly. This assembly is located on a hinged sub-frame attached to the apparatus main frame. The tractor axle assembly is forcibly positioned and locked by way of a mechanical assembly which is motivated by the vertical movement of the hydraulically maneuvered cutting wheel boom. A major additional feature is the novel direct coupling of the cutting wheel driving hydraulic motor to the cutting wheel axle shaft. This is accomplished by the employment of a compact, self-aligning internal shaft coupling which eliminates commonly used costly and inefficient belt drive systems.
Patent figures（8）
Source status & events
No source-status events are recorded.