US PATENT SUBCLASS 172 / 590
.~.~.~.~ Latch responsive to tractor motion

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

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
579  DF  .~ Plural groups of disks {5}
584  DF  .~.~ Horizontally angularly adjustable group {9}
589  DF  .~.~.~ Turning connection offset from draft connection {1}
590.~.~.~.~ Latch responsive to tractor motion

DEFINITION

Classification: 172/590

(under subclass 589) Apparatus comprising a detent means holding two parts against relative motion, which means is

responsive to a movement of the tractor hitched to the implement to release the detent.