Attachment for drive shaft of rotary lawn mowers

Details Attachment for drive shaft of rotary lawn mowers Attachment for drive shaft of rotary lawn mowers

1978-02-24

1980-02-26

Mancene, Louis G.

Harvesters

Cutting

Cutter members

30276, 56 127, A01D 5518

Patent

active

041899059

ABSTRACT:
A vertically extending attachment for the vertically extending drive-shaft of a rotary lawn mower, edger or trimmer comprises a centrally apertured flexible and longitudinally compressible spool which is encased within a rigid cylindrical sleeve of lesser length with a centrally apertured washer at each end which contacts the corresponding ends of the centrally apertured flexible and longitudinally compressible spool. An elongated centrally disposed adjustable bolt extends through the device with its upper end threaded for reception in the usual screw-threaded recess in the lower end of the aforementioned drive-shaft. A heavy duty monofilament or non-metallic cutting strand is wrapped around the aforementioned spool so as to provide at least two free-travelling ends which extend outwardly through relatively short radially disposed tubes which are mounted in evenly spaced alignment with communicating apertures in the sidewall of the rigid sleeve. The exterior of the rigid sleeve is preferably provided with air-agitating vanes. Two of such flexible and longitudinally compressible spools may be employed in tandem, to thus provide storage for greater length of cutting line.

REFERENCES:
patent: 2529486 (1950-11-01), Clarkson et al.
patent: 2706096 (1955-04-01), Rufle
patent: 3018602 (1962-01-01), Diesterweg
patent: 3126693 (1964-03-01), Renn
patent: 3343351 (1967-09-01), Freedlander et al.
patent: 3601960 (1971-08-01), Buechler
patent: 4043103 (1977-08-01), Lakin et al.
patent: 4047299 (1977-09-01), Bair
patent: 4077191 (1978-03-01), Pittinger, Jr. et al.
patent: 4086700 (1978-05-01), Inada
patent: 4104796 (1978-08-01), Sheldon

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