Slip-resistant differential

Claim 1

A SLIP-RESISTANT DIFFERENTIAL UNIT, COMPRISING: A PAIR OF OPPOSED POWER OUTPUT SHAFTS; AXIALLY ALIGNED DIFERENTIAL SIDE GEARS FIXED IN OPPOSED RELATION ON THE INNER ENDS OF SAID SHAFTS; A DIFFERENTIAL CASTING ROTATABLY MOUNTED AT EITHER SIDE THEREOF WITH RESPECT TO THE RESPECTIVE SHAFTS AND SURROUNDING SAID SIDE GEARS; RING GEAR MEANS FOR APPLYING POWER TO SAID CASING; A PINION SHAFT MOUNTED TRANSVERSELY IN SAID CASING AND EXTENDING BETWEEN SAID SIDE GEARS; A PAIR OF PINION GEARS ROTATABLY MOUNTED ON SAID SHAFT AND EACH MESHING AT EITHER SIDE THEREOF WITH SAID SIDE GEARS, SAID PINION GEARS BEING PROVIDED ON THEIR INNER ENDS WITH INWARDLY DIRECTED FRICTION FACES; A PAIR OF FRICTION PLATES MOUNTED BETWEEN SAID SIDE GEARS AND HAVING OUTWARDLY DISPOSED FRICTION FACES DIRECTLY ALIGNED WITH CORRESPONDING FACES PROVIDED ON THE INNER ENDS OF SAID SIDE GEARS; MEANS FOR BIASING SAID FRICTION PLATES OUTWARDLY INTO TIGHT FRICTIONAL ENGAGEMENT WITH SAID SIDE GEARS; AND A PAIR OF MOUNTING BLOCKS CONNECTED BETWEEN SAID FRICTION PLATES AND ON OPPOSITE SIDES OF SAID PINION SHAFTS, SAID MOUNTING BLOCKS EACH BEING PROVIDED WITH FRICTION SURFACES AT EITHER END THEREOF FOR COOPERATION WITH THE FRICTION FACES ON THE INNER ENDS OF SAID PINION GEARS WHEREBY RELATIVE ROTATION OF SAID SIDE GEARS WILL MOVE SAID MOUNTING BLOCKS INTO ENGAGEMENT WITH RESPECTIVE PINION GEARS TO PREVENT ROTATION THEREOF.