Floor mats for automobiles

Claim 1

A FLOOR MAT FOR AUTOMOBILES COMPRISING AN IMPERFORATE FLEXIBLE MOLDED BOTTOM MAT HAVING A PLURALITY OF UPSTANDING INTEGRAL RIBS ON ITS UPPER FACE AND DIVIDING THE UPPER FACE INTO A PLURALITY OF ISOLATED CONCAVITIES WITH IMPERFORATE BOTTOM AND SIDE WALLS, A THIN FLEXIBLE COVER MAT OF WATERPROOF MATERIAL DETACHABLY OVERLYING SAID UPPER FACE AND HAVING A PLURALITY OF REINFORCING LUGS DEPENDING FROM THE UNDERSURFACE THEREOF, SAID LUGS BEING ACCOMMODATED IN SPACES BETWEEN SAID RIBS OF THE BOTTOM MAT AND BEING ADAPTED TO ENGAGE LATERAL FACES OF THE RIBS FOR LIMITING LATERAL MOVEMENT OF THE COVER MAT RELATIVE TO THE BOTTOM MAT, AND SAID LUGS BEING OF SMALLER CROSS SECTION THAN THE CROSS SECTION OF THE SPACES IN WHICH THEY ARE RECEIVED, TAKEN AT THE SAME DEPTH, AND SAID LUGS OF THE COVER MAT BEING OF SUCH LENGTH IN THE DIRECTION NORMAL TO THE UNDER SURFACE OF THE COVER MAT THAT THEIR LOWER ENDS ARE SUBSTANTIALLY AT THE UPPER FACES OF THE BOTTOM MAT AT THE LOCATIONS BETWEEN THE RIBS.