Conveyor lubricating apparatus

Claim 1

APPARATUS FOR LUBRICATING A CONVEYOR MOVING ALONG A PREDETERMINED PATH AND PROVIDED WITH LUBRICANT FITTINGS COMPRISING A SUPPORT MOUNTED ADJACENT THE PATH OF TRAVEL OF THE CONVEYOR, A YOKE MOUNTED FOR ROTATION ON SAID SUPPORT, A PNEUMATIC CYLINDER MOUNTED IN SAID YOKE FOR PIVOTAL MOVEMENT ABOUT AN AXIS PERPENDICULAR TO THE ROTATIONAL AXIS OF SAID YOKE, AN AIR OPERATED PISTON MOUNTED IN SAID CYLINDER AND BIASED BY AIR PRESSURE TO EXTEND ONE END THEREOF AXIALLY FROM THE CYLINDER AND BEING MOVABLE AXIALLY AWAY FROM EXTENDED POSITION UPON RELEASE OF PRESSURE IN THE CYLINDER, A LUBRICATING NOZZLE MOUNTED ON SAID ONE END OF SAID PISTON, MEANS ENGAGEABLE WITH THE CONVEYOR AT A PICK-UP POINT IN THE PATH OF TRAVEL OF A LUBRICANT FITTING AS IT APPROACHES THE HEAD FOR CAUSING ROTATION OF SAID CYLINDER SUCH THAT THE NOZZLE ENGAGES A LUBRICANT FITTING ON THE CONVEYOR AND FIRST AND SECOND RESILIENT MEANS FOR RESPECTIVELY YIELDABLY BIASING SAID YOKE AND SAID CYLINDER INTO THE PICK-UP POSITION THEREOF, THE CYLINDER BEING MOVABLE AGAINST THE PRESSURE OF SAID RESILIENT MEANS AND THE NOZZLE BEING RETRACTABLE AGAINST THE AIR PRESSURE ACTING ON SAID PISTON SO AS TO YIELDABLY SEAT ON THE LUBRICANT FITTING, THE ENGAGEMENT OF SAID NOZZLE AND FITTING ROTATING SAID HEAD UNDER CONTROL OF THE CONVEYOR TO A LUBRICANT INJECTION POSITION WHEREIN SAID NOZZLE IS GENERALLY PERPENDICULAR TO THE PATH OF TRAVEL OF THE CONVEYOR FITTING, SAID HEAD BEING FURTHER SO ROTATABLE UNTIL THE FITTING MOVES OUT OF ENGAGEMENT WITH THE HEAD, THEREBY PERMITTING SAID RESILIENT MEANS ACTING ON SAID YOKE AND CYLINDER AND THE AIR PRESSURE ACTING ON SAID PISTON TO REVERSE THE MOVEMENT OF SAID NOZZLE SO THAT IT IS RETURNED THEREBY TO THE PICK-UP POSITION, SAID LURBICATING NOZZLE BEING BIASED AXIALLY TOWARD THE PICKUP POSITION AS LONG AS PRESSURE IS MAINTAINED IN THE CYLINDER AND BEING RETRACTED WITH THE PISTON TO AN INACTIVE POSITION UPON CUT-OFF OF THE PRESSURE.