US PATENT SUBCLASS 172 / 449
.~ Tool movable relative to mast while earth working


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

439  DF  MAST TYPE HITCH (E.G., THREE POINT HITCH, ETC.) {10}
449.~ Tool movable relative to mast while earth working


DEFINITION

Classification: 172/449

(under subclass 439) Apparatus in which an earth working element is free to move relative to the mast at least to a limited extent while the earth working element is performing its earth working function.

SEE OR SEARCH THIS CLASS, SUBCLASS:

440+, for apparatus comprising angled gangs liftable as a unit with one or more gangs movable relative to the mast while earth working.

450, for a mast-type hitch with tools swayable with respect to the propelling means but fixed with respect to the mast.

501+, for a tool liftable by an actuator on a wheeled frame and with a lost motion connection between the actuator and tool.

SEE OR SEARCH CLASS

280, Land Vehicles, 497, for articulated vehicles comprising a draft connection between the vehicles with vertically spaced connections to the leading vehicle.