Patent ID: 8020256

Claim:
A pivot device comprising: a first hinge part; a second hinge part pivotably connected to the first hinge part about a pivot axis; a blocking device comprising a first element with a friction surface and a second element with a second friction surface; wherein first element is operatively connected to the first hinge part and the second element is operatively connected to the second hinge part; a drive comprising a first thread associated with the first hinge part and a second thread associated with the second hinge part; wherein, when pivoting the first and second hinge parts relative to one another from an initial position into a pivoted position, the first and second threads interact with each other such that the first and second friction surfaces glide across one another and move axially past each other in an axial direction of the pivot axis as a pivot angle between the first and second hinge parts increases; wherein, as the pivot angle increases relative to the initial position, a friction force between the first and second friction surfaces increases and the friction force secures the first and second hinge parts relative to each other against accidental pivoting away from the pivoted position.