Abstract: A self-stopping mobile chair system comprising: a chair including a base, a joint and a seat coupled to the base via the joint to allow a movement of the seat relative to the base between a fore position and an aft position; a locking mechanism configurable between: an engageable state in which the locking mechanism locks the seat upon the seat being in a rated position between the fore and aft positions, the seat movable toward the rated position to be locked by the locking mechanism, and a disengaged state in which the seat is movable between the fore and aft positions unhindered; and an actuator connected between the seat and the locking mechanism to configure the locking mechanism either in the disengaged state upon the seat bearing a force or in the engageable state absent the force. There is also provided a movement stopping system for a mobile chair.

Abstract: A self-locking system comprising a state selector for detecting the intent of an occupant to rise from a chair and then automatically causing a lock to block the mobility functions of the chair. The state detector is responsive to movement of an upper portion of the body of the occupant while the occupant is still supported in a normal seated position on the seat of the chair, thereby advantageously allowing the locking of the mobility functions of the chair to occur before the occupant starts to lift his weight from the seat of the chair.