US PATENT SUBCLASS 172 / 488
.~ Single lift actuator for plural relatively movable tools

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

452  DF  WITH ACTUATOR ADAPTED TO LIFT TOOL FOR TRANSPORT ON WHEELED FRAME OR BROADLY CLAIMED IMPLEMENT {37}
488.~ Single lift actuator for plural relatively movable tools {1}
489  DF  .~.~> Tools relatively moved during lift

DEFINITION

Classification: 172/488

(under subclass 452) Apparatus comprising a plurality of earth working elements which are movable relative to each other and in which a single actuator is provided for lifting all the earth working elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

138+, for diverse tools which are vertically adjusted by a single actuator and move relative to one another when adjusted.

456, for devices having side groups of tools which are movable inwardly toward a vertically movable central group.

462, for plural tools which are spring-biased down and raised as a unit.