US Patent 7134726 Armchair for public transport vehicles

The armchair comprises a seat where an armchair user is seated and at least one armrest that can be folded between a substantially horizontal position and a substantially vertical position, that is characterized in that the at least one armrest describes a downward trajectory when moved from the substantially horizontal position to the substantially vertical position. The armrest does not bother the armchair user when it is in its substantially vertical position, thus enabling manufacturers to exploit the maximum width allowed for this type of armchairs.