Power loader

Claim 1

A DRIVE-IN, DRIVE-OUT TYPE OF POWER LOADER FOR A TRACTOR HAVING A FORE-AND-AFT EXTENDING BODY WITH FRONT AND REAR ENDS SUPPORTED ON TRACTION MEANS, THE LATTER INCLUDING TRANSVERSE AXLE STRUCTURE EXTENDING TO OPPOSITE SIDES OF THE TRACTOR BODY, SAID LOADER COMPRISING: A USHAPED RIGID FRAME HAVING LATERALLY EXTENDING SIDE BEAMS EXTENDING FOR DISPOSITION ON OPPOSITE SIDES OF THE TRACTOR BODY FROM REAR ENDS ADJACENT THE AXLE STRUCTURE TO FORTRANSVERSE BEAM PORTION CLOSELY ADJACENT AND ACROSS THE FRONT END OF THE TRACTOR BODY, EACH OF SAID SIDE BEAMS HAVING A VERTICAL POST THEREON BETWEEN THE FRONT AND REAR END; FORWARDLY PROJECTING LOAD CARRYING BOOM STRUCTURE PIVOTED TO THE POSTS AND HAVING A LOAD CARRIAGE FORWARD OF THE TRACTOR; EXTENSIBLE HYDRAULIC MEANS EXTENDING BETWEEN THE U-SHAPED FRAME AND BOOM STRUCTURE FOR RAISING AND LOWERING THE BOOM STRUCTURE; UPPER AND LOWER LATERALLY DISPOSED BRACKET STRUCTURE ADAPTED FOR RIGID SUPPORT ON THE FORWARD END OF THE TRACTOR AND EXTENDING AND OPENING FORWARDLY TO RECEIVE THE TRANSVERSE BEAM PORTION; VERTICAL BRACKET STRUCTURE ADAPTED FOR RIGID SUPPORT ON THE AXLE STRUCTURE, SAID VERTICAL BRACKET STRUCTURE HAVING UPWARDLY INCLINED CAM SURFACES; CAM ENGAGING MEANS ON THE REAR ENDS OF THE SIDE BEAMS ENGAGEABLE WITH THE RESPECTIVE CAM SURFACES UPON DOWNWARD MOVEMENT OF THE REAR ENDS AND EFFECTING FORE-AND-AFT POSITIONING OF THE LATTER IN PROPER TRACTOR-MOUNTED POSITION; RELEASABLE FASTENER MEANS FOR CONNECTING SAID FRAME REAR ENDS TO THE VERTICAL BRACKET STRUCTURE; AND GROUND ENGAGING UPRIGHT STANDS ON OPPOSITE SIDES OF THE FRAME AND DETACHABLY CONNECTED AT THEIR UPPER ENDS TO THE BOOM STRUCTURE AT POINTS THEREON CLOSELY TO BUT REARWARDLY OF THE SPECIFIC CENTER OF GRAVITY OF THE LOADER WHEREBY THE LOADER WILL BE SLIGHTLY OVERBALANCED FORWARDLY OF THE STANDS AND SAID BOOM STRUCTURE WILL SUPPORT THE LOADER ON THE FORWARD LOAD CARRIAGE AND THE STANDS WHEN DETACHED FROM THE TRACTOR, AND SAID HYDRAULIC UNITS MAY EFFECT RAISING AND LOWERING OF THE REAR ENDS OF THE SIDE BEAMS.