Grass trimming device
OwnerPaul F. Seiboldinventor
Life of this patent
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Abstract
The trimming device has a blade driven by a shaft to have each end pass over cutting teeth at the edge of a circular cutting plate. The drive mechanism is a motor having an enclosed speed reducing unit for driving a shaft at a low speed when rotating the blade. The circular cutting plate is secured to the bottom of the motor housing through the center of which the driven shaft extends. A bail for a handle having a switch and a receptacle for the prongs of a plug on a cord is pivotally mounted on the housing to be positioned at a small angle to the circular cutting plate and 90.degree. therefrom in a vertical position. An extension handle may be applied to the end of the short handle to have the device swing therefrom.
Claims15
In a grass trimming device, a shaft, a motor for driving said shaft, a circular plate having a central opening and radially disposed cutting teeth throughout the outer circumferential edge with a notch provided ahead of each tooth, said plate being disposed in fixed relation relative to said motor with said shaft extending through said opening, a cutting blade of narrow width having a length substantially equal to the diameter of said plate, said blade having a central aperture through which said shaft extends and secured in driving relation therewith with the cutting edges offset but in parallel relation with the centerline of the blade which is aligned with the center of the shaft, said blade cutting edges being in scissors relation with said radially disposed cutting edges, and a handle attached to said assembly and extending outwardly substantially normal to said plate to permit the motor and plate to be moved by said handle in any direction with no more than half of said teeth engaging the grass to be cut at any one time as one end of the cutting blade advances to cut the grass in a notch at one tooth only at any one time with a scissors cutting action to thereby substantially reduce the power required to operate the blade of the trimming device.
Dependencies are inferred from the claim text.