ratchet allowing for carrying out the continuous cut of the cover without needing to carry out the complete rotation of the crank handle it being enough to carry out consecutive tilt movements in both directions of the crank handle itself which can be achieved by means of said ratchet this solution allows for carrying out the opening of any container supported on a surface such as the kitchen countertop tabletop etc without the necessity that the height of the container is greater than or equal to the length of the crank handle optionally said crank handle can be articulated through a point of the intermediate length thereof defining two parts one of which could in certain circumstances tilt outwards and be situated such that it forms an angulation with regard to the other part thereby achieving the reduction of the length of said crank handle which would facilitate the actuation thereof to complement the description being made and for the purpose of helping to better understand the features of the invention according to a preferred practical embodiment example thereof a set of drawings is attached as an integral part of said description wherein the following has been shown in an illustrative and non limiting manner fig1 shows a side perspective view of the can opener.