Filament trimmer with adjustable cutoff blade
OwnerBart T. Ellson, Chadwick A. Shaffer +1inventors
InventorsBart T. Ellson, Chadwick A. Shaffer, Thomas J. Beckey
Life of this patent
Estimating the term…
Abstract
A filament trimmer includes a rotatable trimmer head having an outwardly extending filament. The trimmer has a rear shield and a front wire guard. A cutoff blade is adjustably mounted on the rear shield to move between two different radially inward and outward positions. In the radially outward position, the cutoff blade cuts off the filament at a length in which the filament extends beyond the front guard prior to the filament becoming shortened due to breakage or wear. In the radially inward position, the cutoff blade cuts off the filament at a length in which the filament extends short of the front guard prior to the filament becoming shortened due to breakage or wear.
Claims17
A filament trimmer, which comprises:
- a) a housing;
- b) a rotatable trimmer head on the housing with the trimmer head having a filament extending outwardly therefrom in a cutting plane when the trimmer head is rotated, wherein the trimmer head includes a filament feed system for replenishing the filament as the filament becomes shortened due to breakage or wear, the filament being provided with a predetermined length by a cutoff blade acting to sever any excess filament extending radially beyond the cutoff blade at the conclusion of a filament replenishment operation;
- c) means for permitting an operator to selectively vary the predetermined length of the filament provided by the cutoff blade.
A filament trimmer, which comprises:
- a) a rotatable trimmer head carried on a housing, wherein the trimmer head includes an outwardly extending filament that cuts vegetation when the trimmer head is rotated;
- b) at least one cutoff blade for establishing a predetermined length of the filament when the filament is new prior to the filament being shortened due to breakage or wear;
- and
- c) wherein the cutoff blade is adjustably carried on the housing to allow the operator to selectively change the predetermined length of the filament.
A filament trimmer, which comprises:
- a) a rotatable trimmer head carried on a housing, wherein the trimmer head includes an outwardly extending filament that cuts vegetation when the trimmer head is rotated, wherein the trimmer head further includes a filament feed system that replenishes the length of the filament when the filament is shortened due to breakage or wear;
- b) a cutoff blade on the trimmer housing such that the filament contacts the cutoff blade as its length increases during replenishment of the filament by the filament feed system, wherein the cutoff blade cuts the filament to a predetermined length during filament replenishment;
- and
- c) wherein the cutoff blade is selectively movable by the operator between at least two different positions on the trimmer housing to allow the operator to select a longer or shorter predetermined length for the filament.
A filament trimmer, which comprises:
- a) a rotatable trimmer head having an outwardly extending filament;
- b) a rear shield and a front guard;
- c) a cutoff blade adjustably mounted on the rear shield to move between two different radially inward and outward positions;
- d) wherein the cutoff blade, in the radially outward position thereof, cuts off the filament at a length in which the filament extends beyond the front guard prior to the filament becoming shortened due to breakage or wear;
- and
- e) wherein the cutoff blade, in the radially inward position thereof, cuts off the filament at a length in which the filament extends short of the front guard prior to the filament becoming shortened due to breakage or wear.
Dependencies are inferred from the claim text.