Drill marker lift

Claim 1

THE COMBINATION WITH A GRAIN DRILL HAVING A PAIR OF MARKERS, ONE PIVOTALLY FASTENED ADJACENT EACH END THEREOF, SAID MARKERS EACH BEING ALTERNATELY MOVABLE FROM A FIRST GROUND ENGAGING MARKING POSITION TO A SECOND GROUND CLEARING POSITION, A PLURALITY OF FURROW OPENER ASSEMBLIES, AND POWER MEANS OPERATIVE FOR MOVING SAID FURROW OPENER ASSEMBLIES SELECTIVELY ALTERNATELY BETWEEN FIRST PLANTING AND SECOND GROUND CLEARING POSITIONS, OF: A DRILL MARKER LIFT INCLUDING A MAIN FRAME MEMBER FIXEDLY ATTACHED WITH RESPECT TO ONE END OF SAID DRILL, AN ACTUATOR LEVER PIVOTALLY FASTENED WITH RESPECT TO SAID MAIN FRAME MEMBER, MEANS OPERABLY CONNECTING SAID MARKERS AND SAID ACTUATOR LEVER SO WHEN SAID ACTUATOR LEVER MOVES TO A FIRST LEVER POSITION A FIRST OF SAID MARKERS IS IN SAID FIRST MARKER POSITION AND A SECOND OF SAID MARKERS IS IN SAID SECOND MARKER POSITION AND WHEN SAID ACTUATOR LEVER MOVES TO A SECOND LEVER POSITION SAID FIRST MARKER IS IN SAID SECOND MARKER POSITION AND SAID SECOND MARKER IS IN SAID FIRST MARKER POSITION. CAM MEANS FIXEDLY ATTACHED TO SAID ACTUATOR LEVER, A LINK HAVING A CAM FOLLOWER ENGAGEABLE WITH SAID CAM MEANS, AND MEANS CONNECTED BETWEEN SAID LINK AND SAID FURROW OPENER ASSEMBLIES AND BEING OPERATVE TO MOVE SAID LINK TO ENGAGE SAID CAM MEANS AND THEREBY CAUSE SAID LEVER TO MOVE ALTERNATELY TO SAID FIRST LEVER POSITION AND TO SAID SECOND LEVER POSITION IN RESPONSE TO MOVEMENT OF SAID FURROW OPENER ASSEMBLIES TO THEIR FIRST PLANTING POSITION.