Snap lock device for plastic parts

Claim 1

A LOCKING DEVICE FOR TWO PLASTIC PARTS COMPRISING A PAIR OF HOOK MEMBERS ON ONE PART, A WALL ON THE OTHER PART, A PAIR OF HOLES THROUGH THE WALL POSITIONED COMPLEMENTARY TO THE POSITIONS OF THE HOOK MEMBERS, THE HOOK MEMBERS EACH HAVING A SHANK PORTION FOR EXTENDING THROUGH A HOLE FAR ENOUGH TO POSITION AN END OF THE SHANK BEYOND THE WALL, EACH HOOK MEMBER HAVING A LATERALLY PROJECTING HOOK PORTION ON THE LAST-NAMED END OF THE SHANK PORTION, THE HOOK PORTIONS BEING OPPOSITELY FACING AND BEING POSITIONED FOR CONTACTING THE SURFACES OF THE WALL BEYOND THE HOLES, THE PORTIONS OF THE WALL WHICH DEFINE THE SIDES OF THE HOLES OPPOSITE THE HOOK PORTIONS BEING FORMED AS TABS EXTENDING AT SUBSTANTIALLY RIGHT ANGLES TO THE SHANK PORTIONS, THE TABS BEING YIELDABLE WHEN THE HOOKS ARE PASSED THROUGH THE HOLE, THE PARTS BEING MOLDED PLASTIC, THE OPPOSITELY DIRECTED HOOK PORTIONS PREVENTING THE PARTS FROM SLIDING LATERALLY TO FREE THE HOOK PORTIONS FROM THE HOLES.