Patent ID: 8424697

Claim:
A pressure cap, comprising: a closing part associable with an opening of a container; an engaging arrangement associable with a neck of said container, said engaging arrangement having a side body, said engaging arrangement being provided with a retaining arrangement for engaging in a projection of said container; a line of intended opening interposed between said side body and said closing part, said line of intended opening being defined by a fracturable arrangement having uneven resistance to fracturing, said line of intended opening and said closing part being positioned in relation to one another so that said fracturable arrangement breaks along said line of intended opening when said closing part is moved away from said side body; an opening promoting arrangement of said closing part provided with an activating surface on which a user exerts a force so that said fracturable arrangement is fractured substantially simultaneously to the removal of said closing part from said opening, wherein said fracturable arrangement comprises a fracturable wall having a variable thickness with a lesser thickness in a first zone nearer said activating surface and a larger thickness in a remaining zone or zones that are more distant from said activating surface so as to obtain a fracturable part provided with less resistance to breakage in an initial step of a first opening of said cap.