Earth working – With drive means for tool or cleaner – Guided by walking attendant
Patent
1990-02-15
1991-04-23
Reese, Randolph A.
Earth working
With drive means for tool or cleaner
Guided by walking attendant
172 76, 172 19, 172260, A01B 4504, A01B 6326
Patent
active
050092707
ABSTRACT:
Various earthworking machines make use of an oscillatory blade, such as the herein referred to sod cutter. Instead of employing two handles, one of which raises and lowers the blade and the other of which handles, when tightened, maintains the blade at a selected depth, only a single handle is employed. When the handle is manually moved forwardly, the blade is lowered and when moved rearwardly the blade is raised, but when the single handle is moved to the left the blade is locked at the depth that has been determined by the forward movement of the handle, this handle movement to the left camming a shiftable gear rack into engagement with a fixed gear rack to maintain the adjusted blade depth. Handle movement to the right allows a coil spring to disengage the racks. A stop, when appropriately set, enables the selected depth to be re-established after each raising of the blade whenever no change in blade depth is needed.
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Reese Randolph A.
Thompson Jeffrey L.
Turfco Manufacturing Incorporated
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