Self-propelled/tow-behind, variable width stump cutting machine

Details Self-propelled/tow-behind, variable width stump cutting machine Self-propelled/tow-behind, variable width stump cutting machine

2005-06-28

2008-07-15

Self, Shelley (Department: 3725)

Woodworking

Special-work machine

Stump removing

C144S218000

Reexamination Certificate

active

07398805

ABSTRACT:
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.

REFERENCES:
patent: 3568740 (1971-03-01), Speakman
patent: 3620271 (1971-11-01), Loyer
patent: 4690183 (1987-09-01), Eilertson
patent: 5203388 (1993-04-01), Bowling
patent: 5289859 (1994-03-01), Minton et al.
patent: 5829497 (1998-11-01), Maroney
patent: 7011124 (2006-03-01), Morey

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