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US 5,857,529 AGranted
Weed uprooter
OwnerTranh T. Nguyeninventor
Life of this patent
Estimating the term…
Abstract
An apparatus for uprooting weeds comprising a rotatable handle, a base, a rotatable contacting assembly co-axial with the handle, and a co-axial co-directional rotation multiplying assembly linking the handle to the contacting means wherein the rotation of the contacting means is many times the rotation of the handle so that the weed uprooting action can be achieved by pulling the handle pependicularly by a short distance.
Claims26
An apparatus for uprooting weeds comprising:
- a handle rotating around a first axis mounted on
- a base to be laid down against the ground, said base comprising a substantially flat bottom and two vertical sides,
- a contacting means rotating around said first axis,
- a co-axial co-directional rotation multiplying means rotatably transmitting force applied transversally on said handle to said contacting means, said rotation multiplying means being mounted on said base and linking said handle to said contacting means, said rotation multiplying means comprises a first gear, said first gear being an inner gear rotating around said first axis mounted on said base, a second gear rotating around a second axis mounted on said base, a third gear rotating around a third axis mounted on said base, and a fourth gear rotating around said first axis and bearing said contacting means, the rotation of said first gear being transmitted to said second gear, the rotation of said second gear being transmitted to said third gear and the rotation of said third gear being transmitted to said fourth gear,
- whereby the rotation of said handle is multiplied by said co-axial co-directional rotation multiplying means causing said contacting means to rotate many times more than the rotation of said handle, and the leverage due to the length of said handle minimizes the effort required from the user.
2 more elements
A method for uprooting weeds comprising
- pushing a contacting means onto a weed,
- rotating said contacting means around a first axis, said first axis being mounted on a base comprising a substantially flat bottom and two vertical sides, by pulling a handle in a direction substantially perpendicular to said handle, said handle rotating around said first axis and being mounted on a top structure,
- reducing the rotation angle of said handle relative to the rotation angle of said contacting means by a co-axial co-directional rotation multiplying means mounted on said base said co-axial co-directional rotation multiplying means comprises a first gear, said first gear being an inner gear rotating around said first axis mounted on said base, a second gear rotating around a second axis mounted on said base, a third gear rotating around a third axis mounted on said base, and a fourth gear rotating around said first axis and bearing said contacting means, the rotation of said first gear being transmitted to said second gear, the rotation of said second gear being transmitted to said third gear and the rotation of said third gear being transmitted to said fourth gear.
Dependencies are inferred from the claim text.