US 7,398,639 B2Granted

Wheel double gears chain drive of reel cutter gears

OwnerSteven Wayne Hartmaninventor

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Abstract

The invention provides a lawn cutting device utilizing high-tech, lightweight bicycle parts, low-friction bearing assemblies, air-filled bicycle-type tires and a double-overdrive gearing system. The device has a body portion, handlebar, a blade assembly, and a variety of combination of wheel gears, gear rings, and chains, which result in a device which a blade assembly which moves at extremely rapid speeds, powered by the rotation of the wheels. Because of its reliance on low-friction bearings, a minimal amount of force exerted on the wheels is transformed in an extremely efficient manner into the rotation of the blade assembly, resulting in an environmentally friendly, energy efficient cutting device that avoids the pollution, inefficiency, and strain associated with traditional gas, electric, and human-powered lawnmowers.

Claims7

Dependent claims

A cutting device comprising:

a) a body portion;
b) a handlebar coupled to one end of the body portion;
c) at least two wheels coupled to the body portion, each of the at least two wheels including a wheel gear ring;
d) a blade assembly coupled to the body portion, where the blade assembly comprises at least one blade;
and
e) two blade assembly drive trains, where each blade assembly drive train comprises a first gear ring coupled on one end of the blade assembly, a first chain attached on one end to the first gear ring, a second gear ring attached to the other end of the first chain, a third gear ring attached to the second gear ring, and a second chain attached on one end to the third gear ring and on the other end to the wheel gear ring;
and
whereby a user pushes the cutting device using the handlebar, causing the wheel gear ring of each wheel to rotate, which in turn causes the second chain and third gear ring to rotate, causing the second ring and the first chain to rotate, causing the first gear ring of each blade assembly drive train and the blade assembly to rotate, causing the at least one blade to cut a contacted surface.

5 more elements

Dependencies are inferred from the claim text.