Leaf and pine straw mulching lawn mower attachment

Claim 1

A MULCHING CONSTRUCTION FOR LAWN MOWERS OF THE TYPE COMPRISING A DOWNWARDLY OPENING HOUSING HAVING A GENERALLY HORIZONTAL TOP WALL WITH A DEPENDING PERIPHERAL SKIRT HAVING A LATERAL OUTLET FOR THE DISCHARGE OF GRASS CUTTINGS FROM SAID HOUSING TOGETHER WITH A POWER SOURCE MOUNTED ON SAID HOUSING AND HAVING A VERTICAL POWER SHAFT WITH A BLADE THEREON DISPOSED IN SAID HOUSING; SAID CONSTRUCTION COMPRISING A RING SHAPED SCREEN DISPOSED WITHIN SAID HOUSING, MEANS SUPPORTING SAID SCREEN UPON SAID HOUSING, SAID SCREEN HAVING A CENTRAL OPENING IN ITS BOTTOM RECEIVING AND CLOSELY SURROUNDING SAID BLADE AND ADMITTING VEGETATION TO BE MULCHED, SAID SCREEN COMPRISING AN OPEN TOPPED ANNULAR COLLECTING CHANNEL CONSISTING OF INNER AND OUTER CYLINDRICAL WALLS CLOSED AND JOINED AT THEIR BOTTOM EDGES BY A BOTTOM WALL, SAID INNER WALL BEING CONTINUOUS AND UNBROKEN BUT HAVING THEREIN MULTIFARIOUS PERFORATIONS ESTABLISHING COMMUNICATION BETWEEN SAID CENTRAL OPENING AND SAID COLLECTING CHANNEL AND BEING OF SUFFICIENT SIZE TO COMMINUTE AND MULCH LEAVES AND PINE STRAWS BY PASSAGE THERETHROUGH FROM SAID CENTRAL OPENING INTO SAID CHANNEL, SAID OUTER WALL BEING IMPERFORATE BUT HAVING A MULCH DISCHARGE OPENING REGISTERING WITH SAID HOUSING LATERAL OUTLET AND A CLOSURE FOR THE TOP OF SAID CHANNEL.