A door system for an elevator installation having an elevator car, the door system including a pivotable first car door leaf mounted at a car door opening and a pivotable first shaft door leaf mounted at a shaft door opening of the elevator installation. At least a part of the shaft door opening is closed by the first shaft door leaf in a closed position thereof and a shaft door plane is formed along the shaft door leaf. At least a part of the car door opening is closed by the first car door leaf in a closed position thereof and a car door plane is formed along the car door leaf. The car door leaf, in an open position thereof, extends through the shaft door plane, or the shaft door leaf, in an open position thereof, extends through the car door plane.

Elevator landing door lock assemblies and elevator landing doors having a lock with a keyway accessible from a landing of an elevator system, the lock operable to lock and unlock a landing door and a disengageable link operably connected to the lock and configured to prevent unlocking of the landing door when the disengageable link is not engaged. When an elevator car is aligned with the landing door, the disengageble link is engaged and completed such that the lock is operable to unlock and open the landing door, and, when an elevator car is not aligned with the landing door, the lock is not operable.

Elevator landing door lock assemblies and elevator landing doors having a lock with a keyway accessible from a landing of an elevator system, the lock operable to lock and unlock a landing door and a disengageable link operably connected to the lock and configured to prevent unlocking of the landing door when the disengageable link is not engaged. When an elevator car is aligned with the landing door, the disengageble link is engaged and completed such that the lock is operable to unlock and open the landing door, and, when an elevator car is not aligned with the landing door, the lock is not operable.

A distance sensor device for monitoring a lock clearance of an elevator door locking device of an elevator car door operator is arranged to one of the following: a static structure of the elevator door operator or a hanger plate of the elevator car door operator. The distance sensor device is configured to obtain distance data in a direction parallel to the lock clearance of the elevator door lock device, when the elevator door is locked by the elevator door locking device. The obtained distance data represents the lock clearance of the elevator door lock device. An elevator car door operator includes the distance sensor device and a method monitors a lock clearance of an elevator door locking device of an elevator car door operator.

The invention relates to an elevator system comprising an elevator car which has two car doors with electrically controllable door elements. A first car door is arranged on a first car wall and comprises a first electrically controllable door element. A second car door is arranged on a second car wall and comprises a second electrically controllable door element. The first door element and the second door element each have at least two visual permeability states, wherein a first visual permeability state allows a passenger to see through the door element and wherein a second visual permeability state obstructs a passenger's view through the door element. An elevator controller determines a car door to be opened and controls the door element of the car door to open in accordance with the first visual permeability state to allow viewing through the door element of the car door to be opened.

The invention relates to an elevator system comprising an elevator car which has two car doors with electrically controllable door elements. A first car door is arranged on a first car wall and comprises a first electrically controllable door element. A second car door is arranged on a second car wall and comprises a second electrically controllable door element. The first door element and the second door element each have at least two visual permeability states, wherein a first visual permeability state allows a passenger to see through the door element and wherein a second visual permeability state obstructs a passenger's view through the door element. An elevator controller determines a car door to be opened and controls the door element of the car door to open in accordance with the first visual permeability state to allow viewing through the door element of the car door to be opened.

The object of the invention is an insulated landing door of an elevator, which door comprises at least one door panel that opens and closes in the lateral direction and is provided with a glass surface plate, which door panel comprises a frame structure supporting the door panel and an edge beading on the front edge of the door panel and an insulation element. The insulation element is composed of one or more glass plates, and that there is an air gap between the glass surface plate and the glass insulation element.

The object of the invention is an insulated landing door of an elevator, which door comprises at least one door panel that opens and closes in the lateral direction and is provided with a glass surface plate, which door panel comprises a frame structure supporting the door panel and an edge beading on the front edge of the door panel and an insulation element. The insulation element is composed of one or more glass plates, and that there is an air gap between the glass surface plate and the glass insulation element.

Locking system (10) for a sliding door (2) with respect to a constraint structure comprising a latch (4), associable to the sliding door (2) or to the constraint structure, rotatable or rotatably translatable between a configuration of locking and a configuration of release of the door (2), a keyhole member (6), connectable to the other between the constraint structure or the sliding door (2), which delimits a holding edge (8) that, in the locking configuration, is engaged by the latch (4) to prevent movement of the, sliding door (2) with respect to said structure, the keyhole member (6) being manually operable to move the holding edge (8) and the latch (4) apart, when the latter is in the locking configuration.

A device for preventing excess speed, which is caused by an energy store, of a door leaf, includes a door leaf displaceable between an open position and a closed position, an energy store coupled with the door leaf, which energy store provides energy for the closing movement of the door leaf in the event of failure of the electrical energy supply, a door drive coupled with the door leaf, wherein electrical energy can be induced in the door drive when closing movement of the door leaf takes place, and a door control, which activates the door drive and which is suitable for regulation of the speed of movement of the door leaf, wherein the door control is operable by the induced electrical energy when the electrical energy supply fails, and a method of operating an elevator door.