Front end loaders for refuse trucks and the like

Claim 1

A FRONT END LOADER FOR RAISING, DUMPING AND LOWERING REFUSE BOXES INTO A TRUCK HAVING A WHEELED CHASSIS, A FRONT END DRIVER''S CAB AND A LOAD CARRYING BODY MOUNTED ON SAID CHASSIS REARWARDLY OF SAID CAB, SAID FRONT END LOADER COMPRISING A LOADER FRAME FIXEDLY MOUNTED ON SAID CHASSIS AND EXTENDING OVER SAID CAB AND THE FORWARD END OF SAID TRUCK BODY, SAID LOADER FRAME INCLUDING A PAIR OF LATERALLY SPACED VERTICALLY DISPOSED GIRDERS BENT DIAGONALLY UPWARDLY AND REARWARDLY OVER SAID CAB TO AND IN SPACED RELATIONSHIP OVER THE FORWARD END OF SAID TRUCK BODY, A PAIR OF CHANNEL SHAPED SKIP TRACKS MOUNTED ON EACH SAID GIRDER, ONE SKIP TRACK FOLLOWING THE SAID GIRDER THROUGHOUT ITS ENTIRE LENGTH WHILE THE OTHER SKIP TRACK FOLLOWS SAID GIRDER ALONG THE VERTICAL PORTION THEREOF AND IS SPACED IN A GENERALLY FLAT ARCH SHAPED FROM ABOVE THE SAID UPWARD AND REARWARDLY PORTION OF SAID GIRDER, AN ENDLESS POWER CHAIN MOUNTED ON THE SUPPORTED BY EACH GIRDER ALONG THE ENTIRE LENGTH THEREOF WITH THE POWER FLIGHT OF SAID POWER CHAIN DISPOSED ALONG THE FORWARDLY DISPOSED FACE OF SAID GIRDER, A SKIP INCLUDING A PAIR OF LOADER ARMS EACH PIVOTALLY CONNECTED TO DOUBLE TRUNNIONS RUNNING IN SAID ONE SKIP TRACK AND BY A FIXED ARM TRACK AT A POINT SPACED RUNNING IN SAID OTHER SKIP TRACK AT A POINT SPACED ABOVE AND LATERALLY OF SAID DOUBLE TRUNNIONS, SAID FIXED ARMS HOLDING SAID LOADER ARMS AND SAID DOUBLE AND SINGLE TRUNNIONS IN RIGHT ANGULAR RELATIONSHIP TO EACH OTHER, MEANS LATERALLY SPACING SAID TRUNNIONS OF EACH LOADER ARM IN ALIGNMENT WITH THEIR SKIP TRACKS, MEANS CONNECTING EACH LOADER ARM TO SAID POWER FLIGHT OF SAID POWER CHAIN, AND MANUALLY CONTROLLED HYDRAULIC MEANS MOVING SAID POWER CHAINS IN A SELECTED DIRECTION WHEREBY TO LIFT SAID LOAD ARMS AND A LOAD BOX ENGAGED THEREBY TO AND FROM A DUMPING POSITION, THE SAID LOADER ARMS TURNING OVER A LOAD BOX CARRIED THEREBY RESPONSIVE TO THE DOUBLE TRUNNIONS RUNNING ALONG EACH SAID ONE SKIP TRACK AND SAID SINGLE TRUNNION RUNNING ALONG SAID OTHER SKIP TRACK AS SAID LOADER ARMS CARRYING SAID LOAD BOX ARE RAISED BY SAID POWER CHAINS FIRST VERTICALLY ALONG SAID SKIP TRACKS AND THEN UPWARDLY AND REARWARDLY BEYOND THE VERTICAL PORTION OF SAID SKIP TRACKS.