Scooter with tandem traction wheel drive

Claim 1

IN A SCOOTER WITH TANDEM TRACTION WHEEL DRIVE: (A) A SUPPORTING FRAME PROVIDED WITH A TERRAIN-ENGAGING STEERING WHEEL; (B) THE SUPPORTING FRAME DEFINING A PAIR OF LATERALLYSPACED SIDE FRAME MEMBERS; (C) A WHEEL CARRIAGE ASSEMBLY HAVING A PAIR OF LATERALLYSPACED PARALLEL AND UPRIGHT PLATES, EACH BEING DISPOSED ADJACENT TO ONE OF THE SIDE FRAME MEMBERS IN SUBSTANTIALLY PARALLEL RELATION THEREWITH; (D) A SUBSTANTIALLY HORIZONTAL TRANSVERSE JOURNAL AXLE SECURED TO THE SIDE FRAME MEMBERS TO EXTEND THROUGH THE SIDE PLATES AND ABOUT WHICH THE WHEEL CARRIAGE ASSEMBLY MAY SWING IN EITHER DIRECTION; (E) THE WHEEL CARRIAGE ASSEMBLY HAVING FRONT AND REAR TRACTION WHEELS MOUNTED ON SHAFTS THAT ARE SUPPORTED BY THE SIDE PLATES AND ARRANGED THEREBETWEEN FOR ENGAGING WITH THE TERRAIN; (F) AN ENGINE-SUPPORTING PLATE EXTENDING BETWEEN THE SPACED SIDE PLATES AND THE WHEELS CARRIAGE ASSEMBLY AND BEING SECURED THERETO; (G) AN ENGINE MOUNTED ON SAID SUPPORTING PLATE AND A VARIABLE SPEED DRIVE OPERABLE BY THE ENGINE, SAID DRIVE BEING DISPOSED BETWEEN THE SPACED SIDE PLATES AND SUPPORTED ON A SHAFT HAVING ITS ENDS JOURNALLED IN BEARINGS FIXED TO THE SIDE PLATES, SAID DRIVE BEING OPERATIVELY CONNECTED BY SPROCKET-CHAIN ASSEMBLIES TO BOTH TRACTION WHEELS TO DRIVE THE LATTER SIMULTANEOUSLY, THE SPROCKETS BEING MOUNTED ON SHAFTS, EACH OF THE LATTER BEING SUPPORTED IN BEARINGS FIXED TO THE SIDE PLATES; (H) THE SIDE PLATES TRACTION WHEELS, SUPPORTING PLATE, ENGINE AND VARIABLE SPEED DRIVE ALL BEING WITHDRAWNABLE AS A UNIT FROM THE SUPPORTING FRAME, WHEN THE TRANSVERSE JOURNAL AXLE IS REMOVED FROM THE SIDE FRAME MEMBERS OF THE SUPPORTING FRAME, WITHOUT DISMANTLING SAID VARIABLE SPEED DRIVE AND SPROCKETCHAIN ASSEMBLIES.