Vegetation cutters

Details Vegetation cutters Vegetation cutters

1990-09-07

1991-11-12

Watts, Douglas D.

Cutlery

Cutting tools

With blade moving means

30347, A01D 5000

Patent

active

050636731

ABSTRACT:
A device for cutting vegetation has a housing rotatable about an axis, a rotatable spool within the housing storing a supply of flexible line having an end extending through an aperture in the housing into a cutting plane normal to the axis, and an arrangement for automatically letting out additional line by causing relative rotation between the spool and housing whenever the length of line extending into the cutting plane is less than a predetermined length. The automatic arrangement includes a series of angularly-spaced locking faces provided on the spool (or on a member connected thereto) or on the housing, and a balance bar pivotally mounted on the housing or on the spool with this balance bar having a member for engagement with the locking faces. The center of gravity of the balance bar is on the side of the pivot point opposite from the engagement member. In use, the balance of forces on the engagement member directs this member against the locking faces.

REFERENCES:
patent: 4274201 (1981-06-01), Oberg et al.
patent: 4285127 (1981-08-01), Zerrer et al.
patent: 4607431 (1986-08-01), Gay
patent: 4651421 (1987-03-01), Zerrer
patent: 4667410 (1987-05-01), Weid et al.
patent: 4817288 (1989-04-01), Hirose et al.
patent: 4866846 (1989-09-01), Hoffmann et al.
patent: 4897923 (1990-02-01), Collins
patent: 4926557 (1990-05-01), Haupt

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