Device for tilling beneath the transmission casing of a rotary cultivator

Claim 1

CULTIVATOR APPARATUS OF THE CLASS DESCRIBED, COMPRISING: AN ELONGATED CULTIVATOR SHAFT FOR SUPPORTING CULTIVATOR BLADES, SAID SHAFT EXTENDING TRANSVERSELY OF THE DIRECTION OF TRAVEL OF THE CULTIVATOR AND ABOVE THE GROUND BEING CULTIVATED; A TRANSMISSION FOR DRIVING SAID SHAFT IN ROTATION ABOUT ITS LONGITUDINAL AXIS DURING SAID TRAVEL OF SAID CULTIVATOR, SAID TRANSMISSION INCLUDING A CASING SURROUNDING AND ENCLOSING LATERALLY SPACED PORTIONS OF SAID SHAFT; A BLADE SUPPORT MEMBER MOUNTED ON SAID SHAFT FOR ROTATION THEREWITH ADJACENT TO SAID CASING; A CULTIVATOR BLADE HAVING A FREE END PORTION ENGAGEABLE WITH THE GROUND BEING CULTIVATED, THE OTHER END PORTION BEING CONNECTED TO SAID SUPPORT MEMBER FOR PIVOTAL MOVEMENT ABOUT AN AXIS SPACED FROM AND EFFECTIVELY PERPENDICULAR TO THE ROTATIONAL AXIS OF SAID SHAFT, SAID FREE END PORTION, IN ITS ENTIRETY, BEING SPACED RADIALLY OUTWARDLY FROM SAID AXIS OF PIVOTAL MOVEMENT THROUGHOUT THE ENTIRE RANGE OF SAID PIVOTAL MOVEMENT; RESILIENT MEANS YIELDINGLY URGING SAID BLADE TO A POSITION WHEREIN CLEARANCE IS PROVIDED BETWEEN SAID BLADE AND SAID TRANSMISSION; AND STOP MEANS LIMITING SAID PIVOTAL MOVEMENT TO A PREDETERMINED RANGE OF ANGULAR DISPLACEMENT, SAID FREE END PORTION BEING POSITIONED DIRECTLY BENEATH SAID TRANSMISSION WHILE SAID CULTIVATOR BLADE IS IN ENGAGEMENT WITH SAID GROUND BY THE FORCE RESULTING FROM SAID ENGAGEMENT AND AWAY FROM SAID TRANSMISSION BY SAID RESILIENT MEANS TO CLEAR SAID CASING DURING MOVEMENT OF SAID FREE END PORTION ABOVE THE GROUND.