US PATENT SUBCLASS 172 / 552
.~.~ Laterally extending bar or blade with skeleton support (e.g., lawn mower type, etc.)

Current as of: June, 1999
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172 /   HD   EARTH WORKING

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
540  DF  .~ Tool has circumferentially spaced teeth, tines, blades or the like {13}
552.~.~ Laterally extending bar or blade with skeleton support (e.g., lawn mower type, etc.) {1}
553  DF  .~.~.~> Toothed bar or blade

DEFINITION

Classification: 172/552

(under subclass 540) Apparatus in which a laterally extending bar or earth working blade portion is held on a rotatable support by openwork or spaced supporting means.

(1) Note. The general appearance of these devices is usually very similar to that of the conventional lawn mower.

SEE OR SEARCH THIS CLASS, SUBCLASS:

31, for similar rolling earth working elements combined with means for shifting surface material without soil disturbance (e.g., combined with rake).

121, for driven earth working elements having laterally extending blades or skeleton support.

SEE OR SEARCH CLASS 301, Land Vehicles: Wheels and Axles,

52, for vehicle wheels composed of two or more parallel rims connected one to the other by cleats.