Revolving seat, in particular for a rail vehicle

A seat comprising a moveable upper part (14) for receiving at least one occupant, said moveable upper part being carried by a fixed lower part forming a substructure (16), and means (28) for turning the upper part (14) backwards and forwards,

• wherein the turning means (28) comprises
• a pivot (30) connecting the upper part (14) and the substructure (16), an axis (Z) of the pivot (30) being substantially vertical,
• a bearing-forming slide (36) mounted within the upper part (14) so as to be displaceable in rotation about the pivot (30) and in translational motion substantially perpendicular to the axis (Z) of the pivot (30), and
• first and second complementary cams (46, 48) carried respectively by the substructure (16) and the upper part (14), wherein one of the cams comprises a developing profile imparting a predetermined turning travel to the upper part (14),
• wherein the first cam forms a finger (46) integral with the substructure (16), and the second cam forms a guide (48) having a developing profile and formed in the upper part (14), the guide (48) extending substantially parallel to a plane perpendicular to the axis (Z) of the pivot (30).

A seat comprising a moveable upper part (14) for receiving at least one occupant, said moveable upper part being carried by a fixed lower part forming a substructure (16), and means (28) for turning the upper part (14) backwards and forwards,

• wherein the turning means (28) comprises
• a pivot (30) connecting the upper part (14) and the substructure (16), an axis (Z) of the pivot (30) being substantially vertical,
• a bearing-forming slide (36) mounted within the upper part (14) so as to be displaceable in rotation about the pivot (30) and in translational motion substantially perpendicular to the axis (Z) of the pivot (30),
• first and second complementary cams (46, 48) carried respectively by the substructure (16) and the upper part (14), wherein one of the cams comprising a developing profile imparting a predetermined turning travel to the upper part (14), and
• releasable means (50) for locking the upper part (14) relative to the substructure (16).

A rail vehicle comprising a seat having a moveable upper part (14) for receiving at least one occupant, said moveable upper part being carried by a fixed lower part forming a substructure (16), and means (28) for turning the upper part (14) backwards and forwards,

• wherein the turning means (28) comprises
• a pivot (30) connecting the upper part (14) and the substructure (16), an axis (Z) of the pivot (30) being substantially vertical,
• a bearing-forming slide (36) mounted within the upper part (14) so as to be displaceable in rotation about the pivot (30) and in translational motion substantially perpendicular to the axis (Z) of the pivot (30), and
• first and second complementary cams (46, 48) carried respectively by the substructure (16) and the upper part (14), the first cam comprising a developing profile and forming a guide for the second cam extending substantially parallel to a plane perpendicular the axis of the pivot so as to impart a predetermined turning travel to the upper part (14).