Degreaser

Claim 1

FOR USE IN A PARTS CLEANING MACHINE COMPRISING A TANK ADAPTED TO CONTAIN A CLEANING FLUID, SAID TANK HAVING OPPOSED SIDE WALLS, MEANS FOR AGITATING THE FLUID WITHIN SAID TANK DURING A CLEANING OPERATION, SAID MEANS INCLUDING AN IMPELLER DISPOSED WITHIN SAID TANK ADJACENT EACH OF SAID SIDE WALLS, A DRIVE SHAFT CONNECTED TO EACH OF THE IMPELLERS, EACH OF SAID SHAFTS EXTENDING THROUGH THE ADJACENT SIDE WALL OF SAID TANK, A BEARING SLEEVE CONNECTED TO THE OUTER SURFACE OF SAID SIDE WALLS, BEARING MEANS FOR ROTATABLY SUPPORTING SAID SHAFTS IN SAID RESPECTIVE BEARING SLEEVE, THE IMPROVEMENT OF SEALING MEANS DISPOSED ABOUT EACH OF SAID SHAFTS BETWEEN THE SIDE WALL AND BEARING MEANS THEREOF TO PREVENT LEAKAGE OF FLUID FROM SAID TANK TO SAID BEARING MEANS, EACH OF SAID SEALING MEANS INCLUDING A MECHANICAL SEAL ON THE TANK SIDE OF SAID BEARING MEANS, MEANS FORMING AN AIR SEAL ON THE TANK SIDE OF SAID MECHANICAL SEAL, AND A FLEXIBLE LIP SEAL DISPOSED ABOUT SAID SHAFT BETWEEN SAID AIR SEAL AND SAID MECHANICAL SEAL, SAID LIP SEAL FUNCTIONING AS A ONE WAY CHECK TO PREVENT THE BACK PRESSURE OF SAID RESPECTIVE AIR SEALS FROM ACTING AGAINST THE SEALING EFFECT OF THE MECHANICAL SEALS AND TO ENHANCE THE OPERATION OF SAID SEALING MEANS WHEN THE AIR SEALS ARE RENDERED INOPERATIVE, AND A SECOND MORE FEATHERY LIP SEAL DISPOSED ABOUT SAID SHAFT BETWEEN THE TANK AND SAID AIR SEALS TO EFFECT UNIFORM DISTRIBUTION OF AIR ABOUT THE ENTIRE CIRCUMFERENCE OF SAID SHAFT AND TO PREVENT THE LEAKAGE OF FLUID FROM SAID TANK TO SAID AIR SEAL WHEN THE LATTER ARE RENDERED INOPERATIVE.