Patent ID: 9701320
Date: 2017-07-11
CPC Classifications: B61B,E05B

Claim:
1. A mechanical lift seat comprising a guard rail capable of occupying a first lowered extreme position delimiting an enclosed space allowing to prevent a passenger from falling and a second raised extreme position in which the guard rail frees a space at the front of the seat to allow the disembarkation of one or several passenger(s), and a locking mechanism configured to lock the guard rail when the latter occupies a lowered position, wherein the locking mechanism comprises a bistable electromagnet provided with a rod movable between a first steady position in which the rod allows locking of the guard rail in the lowered position by interposing an obstacle on the upward trajectory described by a guard rail element to pass from the lowered position to the raised position, and a second steady position in which the rod allows unlocking of the guard rail in order to displace it to the raised position by displacement of the obstacle away from the upward trajectory described by the guard rail element.