Harvesters – Motorized harvester – Including cutter yieldably mounted on its drive means
Patent
1995-09-07
1997-09-02
Melius, Terry Lee
Harvesters
Motorized harvester
Including cutter yieldably mounted on its drive means
56 121, 56DIG9, 56DIG18, 30276, 7167, A01D 3468
Patent
active
056619600
ABSTRACT:
A handle assembly, especially useful on power line trimmers, includes a fore arm rest or fore arm "contacting element" which retains the user's arm, a first handle positioned directly in line with a trough in said fore arm rest, and a second handle positioned to a side of the fore arm rest and first handle. In operation, the user's first hand and fore arm act in concert to direct the power tool, while the user's second hand acts to sweep the power tool from side to side, whereby the user's fore arm acts as a fulcrum at the fore arm rest of the handle assembly. By providing three points of contact with the user, the handle assembly allows the user to engage in a sweeping motion that is less strenuous and more easily controlled. In addition, the handle assembly provides better balancing of the power tool, and assists in maneuvering the power tool. Ideally, the first handle will pivot to any of a number of angles along an arc in alignment with the trough of the fore arm rest in order to accommodate the ergonomic requirements of a variety of different sized individuals. In the case of a power line trimmer, it is advantageous to have wheels on the protective housing which shrouds the cutting head which can be selectively rotated into a ground engaging position, or stored out of the way in a non-contacting position at the discretion of the user. A locking mechanism connected to the pivot plates on which the wheels are mounted is used to lock the wheels to roll along lines that are offset from perpendicular to the pole connecting the handle assembly to the cutting head by equal and opposite angles, thus permitting the line trimmer to be rolled in a sweeping fashion without the wheels changing directions at the end of each sweep.
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patent: 5287683 (1994-02-01), Smith
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Bowen James H.
Smith Walker
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