Power tool

Claim 1

AN ELECTRICALLY POWERED TOOL COMPRISING: A POWER UNIT HOUSING, DRIVE MEANS POSITIONED WITHIN SAID POWER UNIT HOUSING INCLUDING A DRIVE SHAFT, A GEAR ON ONE END OF SAID SHAFT, A FIRST BEARING FOR SUPPORTING THE END OF SAID SHAFT WHICH IS REMOTE FROM SAID GEAR, A SECOND BEARING IN SAID POWER UNIT HOUSING SUPPORTING THE END OF SAID SHAFT CARRYING SAID GEAR, A HUB FORMED ON THE END OF THE SECOND BEARING ADJACENT THE GEAR WITH THE HUB OUTER DIAMETER BEING CONCENTRIC WITH THE SECOND BEARING INNER DIAMETER, MEANS FOR SECURING SAID BEARINGS IN SAID POWER UNIT HOUSING FOR SUPPORTING SAID SHAFT FOR ROTATION, A TOOL HEAD HOUSING SEPARABLE FROM SAID POWER UNIT HOUSING ADAPTED TO COOPERATE WITH SAID POWER UNIT HOUSING, GEAR MEANS POSITIONED WITHIN SAID TOOL HEAD HOUSING TO ENGAGE AND BE DRIVEN BY SAID DRIVE SHAFT GEAR, TOOL WORK OUTPUT MEANS DRIVEN BY SAID GEAR MEANS, AN INTERMEDIATE PLATE FORMING A WALL OF SAID TOOL HEAD HOUSING TO BE ALIGNED WITH SAID POWER UNIT HOUSING ADJACENT SAID GEAR, AN APERTURE FORMED IN SAID PLATE TO SNUGLY RECEIVE SAID HUB, SAID APERTURE BEING ACCURATELY POSITIONED SO THAT SAID GEAR EXTENDS INTO SAID TOOL HEAD HOUSING TO PROPERLY ENGAGE SAID GEAR MEANS, AND FASTENING MEANS FOR RELEASABLY SECURING SAID INTERMEDIATE PLATE TO SAID POWER UNIT HOUSING WHILE SAID SHAFT AND HUB EXTEND THROUGH SAID APERTURE, SAID FESTENING MEANS HAVING LOOSE TOLERANCES IN A PLANE PARALLEL TO SAID PLATE SO THAT THE FASTENING MEANS DOES NOT PRECISELY POSITION THE PLATE IN SAID PLANE AND THE PLATE IS PRIMARILY LOCATED WITHIN SAID PLANE ONLY BY SAID HUB AND SAID APERTURE.