Lawnmower blade with yieldable opposite outer cutting sections

Details Lawnmower blade with yieldable opposite outer cutting sections Lawnmower blade with yieldable opposite outer cutting sections

1992-12-23

1993-12-21

Melius, Terry Lee

Harvesters

Motorized harvester

Including cutter yieldably mounted on its drive means

56255, 56295, A01D 3468

Patent

active

052712125

ABSTRACT:
A lawnmower blade includes a center blade section having an opening for mounting and fastening the blade to the lower end of a mower drive shaft and a pair of opposite outer blade sections containing cutting edges. The outer blade sections are substantially equal in length to one another. Also, the blade includes a pair of assemblies defining yieldable articulating joints attaching one end portion of each outer blade section to one of the opposite end portions of the center blade section such that each outer blade section can both pivot upwardly and rotate backwardly relative to the forward direction of blade rotation and to the respective one opposite end portion of the center blade section so as to yield upon striking an object and thereby prevent damage to the engine crankshaft or the cutting edges. The outer blade sections are capable of restoring to straightened longitudinal alignment with the center blade section, after passing the object, due to response to centrifugal force imposed on the outer blade sections by their rotation with the center blade section.

REFERENCES:
patent: 3507104 (1970-04-01), Kline et al.
patent: 4313297 (1982-02-01), Maier
patent: 4471603 (1984-09-01), Veltin, Jr.
patent: 4525990 (1985-07-01), Zweegers
patent: 4594843 (1986-06-01), Andersson et al.
patent: 5090186 (1992-02-01), Anderson

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