Sliding double doors, particularly for railway and tramway vehicles
AssigneeFiat Ferroviaria Savigliano S.p.A.
InventorCarlo Racca
Life of this patent
Estimating the term…
Abstract
Sliding doors, particularly for railway and tramway vehicles, comprise two opposing doors which are movable relative to a doorway between an emplaced closed position and a withdrawn open position by guide means and motorized drive means. The drive means include a motorized chain transmission connected to the two doors to effect their opening and closing sliding movements, and rotatable cam means defining, for each door, an arcuate track with which feeler means connected to the two doors cooperate to effect, in the initial phase of the opening sliding movement and in the final phase of the closing sliding movement of these doors respectively, the withdrawal and the emplacement of the doors relative to the doorway.
Claims4
Sliding doors, particularly but not exclusively for railway and tramway vehicles, of the type comprising means defining a doorway;
- two opposing doors movable relative to the doorway between a closed position in which the doors are emplaced in the doorway and closed together and an open position in which the doors are withdrawn from the doorway and spaced from each other;
- guide means for guiding the doors in their opening and closing movements, and motorised drive means for effecting these opening and closing movements, wherein the improvement consists in the drive means including:
- a motorised chain transmission connected to the two doors and movable in one direction and in the opposite direction respectively to effect the simultaneous opening and closing sliding movements of the doors;
- respective members connecting the chain transmission to the two doors;
- respective rotatable cam means defining an arcuate track for each door, each track having an initial portion in the form of an arc of a spiral and a final portion in the form of an arc of a circle, and
- respective feeler means connected to the doors and cooperating with the respective arcuate tracks to effect, in the initial phase of opening sliding movement and in the final phase of closing sliding movement of the two doors respectively, the withdrawal and emplacement of the doors relative to said doorway.
Dependencies are inferred from the claim text.