Harvesters – Motorized harvester – Including cutter yieldably mounted on its drive means
Patent
1980-08-20
1981-09-22
Hirsch, Paul J.
Harvesters
Motorized harvester
Including cutter yieldably mounted on its drive means
30276, A01D 5000, A01D 5300
Patent
active
042902576
ABSTRACT:
An attachment for the lower end of a vertical drive-shaft of a wheel-mounted power mower of the rotary lawn mower type comprises a balanced assembly of centrally-bored shaft-engaging hub together with a plurality of equi-distantly spaced radially extending arms each of which carries a boss or lateral enlargement adjacent its outer end for receiving a quickly and easily replaceable flexible cutting line which projects freely therefrom in the general direction of the arm by which it is carried. The lower end of the vertical drive-shaft of the prime mover of the rotary mower, which ordinarily receives the mid-section of a rigid metallic cutting blade that is sharpened adjacent each of its ends, is attached to the hub of the rotary assembly of the invention, suitable adapter means being provided for accommodating driveshafts of different sizes. The upper surfaces of the arms which extend radially from the hub are provided with means for generating air currents in a vertical direction during the cutting operation which will cause the vegetation to extend upwardly prior to and during its being cut. A preferred embodiment includes anti-friction bearing means carried on the lateral extensions on the outer ends of the radially-extending arms for supporting the replaceable flexible cutting lines for free rotation upon their axes upon contact with the vegetation during the rotation of the hub, which thereby substantially reduces wearing of the flexible lines by its frictional contact with the vegetation.
REFERENCES:
patent: 4054993 (1977-10-01), Kamp et al.
patent: 4062114 (1977-12-01), Luick
patent: 4065913 (1978-01-01), Fisher et al.
patent: 4097991 (1978-07-01), Proulx
patent: 4112653 (1978-09-01), Ballas et al.
patent: 4126990 (1978-11-01), Fisher et al.
patent: 4201034 (1980-05-01), Frantello
patent: 4232505 (1980-11-01), Walto
Geib, Jr. Robert U.
Hirsch Paul J.
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