Dishwasher drain airgap

Claim 1

APPARATUS FOR PROVIDING A DRAIN GAP COMPRISING AN OUTER CAP HAVING A CYLINDRICAL CAVITY WHICH IS OPEN AT ONE END, AN INNER CAP SMALLER THAN SAID OUTER CAP, MEANS SUPPORTING SAID INNER CAP WITHIN THE CAVITY OF SAID OUTER CAP, SAID INNER CAP HAVING A CYLINDRICAL CAVITY THEREIN WHICH IS OPEN AT ONE END, THE OPENINGS OF THE CAVITIES OF BOTH OF SAID CAPS FACING IN THE SAME DIRECTION, AN OUTFLOW PIPE HAVING ONE END EXTENDING INTO THE OUTER CAP CYLINDRICAL CAVITY AND COUPLED TO THE WALLS THEREOF, AN INFLOW PIPE HAVING A DIAMETER WHICH IS LESS THAN THAT OF SAID INNER CAP, MEANS SUPPORTING SAID INFLOW PIPE COAXIALLY WITHIN SAID OUTFLOW PIPE AND WITH ONE END EXTENDING WITHIN THE CAVITY OF SAID INNER CAP ADJACENT TO THE CLOSED END OF SAID INNER CAP CAVITY, AND AN OPENING IN THE WALLS OF SAID OUTER CAP FOR ADMITTING ATMOSPHERIC PRESSURE INTO THE SPACE BETWEEN SAID INNER CAP AND SAID OUTFLOW PIPE, SAID OUTFLOW PIPE HAVING THREADS FORMED IN ITS OUTER SURFACE, MEANS MOUNTED ON THE WALLS OF THE CAVITY OF SAID OUTER CAP FOR THREADABLY ENGAGING SAID OUTER CAP WITH THE THREADS ON SAID OUTFLOW PIPE''S OUTER SURFACE, AND A NUT THREADED ON SAID OUTFLOW PIPE''S OUTER WALLS FOR ENABLING SAID APPARATUS TO BE CLAMPED TO A SUPPORTING SURFACE BETWEEN SAID NUT AND THE END OF SAID OUTER CAP.