Cover for drainage tiles

Claim 1

A GATE ASSEMBLY FOR DRAINAGE TILES, COMPRISING, A CYLINDRICAL CLAMP MEMBER ADAPTED TO EMBRACE A CYLINDRICAL TILE, AN ARM PIVOTALLY CONNECTED TO SAID CLAMP MEMBER, A GATE UNIT HAVING A FRAME MEMBER CONNECTED TO SAID ARM, AT A POINT SPACED FROM SAID PIVOTAL CONNECTION TO SAID CLAMP MEMBER, AND A PLURALITY OF SPACED APART FINGER MEMBERS CONNECTED TO SAID FRAME MEMBER, SAID GATE UNIT ADAPTED TO PIVOT TO AN OPEN POSITION AT AN ANGLE TO THE END PLANE OF A TILE, AND TO A CLOSED POSITION ADJACENT THE END OF A TILE, SAID FINGERS HAVING A LENGTH SUFFICIENT TO EXTEND SUBSTANTIALLY ACROSS THE OPEN END OF A TILE, AND SAID FINGERS BEING DISPOSED IN A PLANE AT AN ANGLE TO A NORMAL TRANSVERSE PLANE TO SAID ARM WHEN SAID GATE UNIT IS IN SAID POSITION, SAID ARM HAVING PIVOTAL MEANS ON THE OPPOSITE SIDE OF SAID FINGER MEMBERS FROM THE POINT OF SAID FIRST MENTIONED PIVOTAL CONNECTION TO SAID CLAMP MEMBER, WHEREBY SAID GATE UNIT MAY BE REVERSED AND PIVOTALLY CONNECTED TO SAID CLAMP MEMBER BY SAID PIVOTAL MEANS THEREBY POSITIONING SAID FINGER MEMBERS AT AN ANGLE IN THE OPPOSITE DIRECTION FROM SAID NORMAL PLANE.