Patent ID: 8702601

Claim:
A medical access device for creating an access to a body for a minimally invasive intervention, comprising a hollow body, assembled from at least two parts having longitudinally extending edges, said at least two parts being assembled along its respective longitudinally extending edges, each part having a distal body portion and, at an angle to the latter, a proximal portion, said distal body portions, when assembled along its edges, result in a distal body with laterally outwardly standing proximal body portions, and when moving said laterally outwardly standing proximal body portions inwardly together along said edges along a curved transition area, a proximal hollow body results with laterally outwardly standing distal body portions, a sealing cap fitted onto a proximal end of said proximal hollow body, and a locking mechanism locking said assembled proximal hollow body portions, wherein said locking mechanism having at least one hook projecting from an edge of a proximal body portion, said hook having a nose extending from proximal to distal, and having a recess in an edge joining said edge having said hook, said recess being cut into said edge opposite to said hook and said recess opens to said hook, a shape of said recess is in that, when moving said proximal parts inwardly together by rolling said edges to be joined in a first direction along said curved transition area, said nose of said hook enters said recess from proximal to distal without a relative movement between hook and proximal part having said hook, and said recess blocks a movement of said hook out of said recess in a direction perpendicular to surfaces of said edges, thereby blocking a pulling away of joined edges, and wherein said nose moves out of said recess, without a relative movement between said hook and said proximal part having said hook, when moving said joined proximal parts by rolling it in a second direction counter to said first direction along said curved transition area.