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US 6,684,567 B2Granted
Plug door drive system
AssigneeWestinghouse Air Brake Tecnologies Corporation
InventorsPeter Heidrich, Paul A. Skalak, Robert L. Oakley
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AssigneeWestinghouse Air Brake Tecnologies Corporation
InventorsPeter Heidrich, Paul A. Skalak, Robert L. Oakley
Estimating the term…
Drive system for moving a load along a curved path. The drive system includes a base for mounting the drive system, the base having a curved track for guiding the load along the curved path. There is a load engaging mechanism mounted on the base for movement relative to the base, the load engaging mechanism being for moving the load. The load engaging mechanism has a curved track engaging roller for engaging the curved track. A linear drive mechanism including a linearly driven member is mounted on the base. The linearly driven member includes a driving pivot. A drive link is attached to the driving pivot at a drive force receiving end of the drive link, the drive link including a driven pivot at a drive force communicating end of the drive link. The driven pivot is attached to the load engaging mechanism, whereby linear motion of the driving pivot causes motion of the load along the curved path.
A drive system for moving a load along a curved path, said drive system comprising:
A drive system for a plug door of a vehicle having a sidewall, said drive system for moving said plug door along a curved path between a closed position substantially within said sidewall of said vehicle and an open position adjacent said sidewall of said vehicle, said drive system comprising:
A drive system for a pair of biparting plug doors consisting of a first door and a second door, said biparting plug doors for a vehicle having a sidewall, said drive system moving said first door along a first curved path between a first door closed position substantially within said sidewall of said vehicle and a first door open position adjacent said sidewall of said vehicle, said drive system simultaneously moving said second door between a second door closed position substantially within said sidewall of said vehicle and a second door open position adjacent said sidewall of said vehicle, said drive system comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Characterised by the movements of the door: both swinging and sliding
For wings sliding horizontally more or less in their own plane: consisting of two or more independent parts movable each in its own guides
With transversely moving track: specially adapted for use in railway-cars or mass transit vehicles
Braking devices, e.g. checks; Stops; Buffers: buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
Term ended 18 Dec 2021 (estimated)
The present invention relates, in general, to drive systems for moving a load along a curved track and, more particularly, the invention relates to sliding plug doors for transit type vehicles.
Sliding plug doors for transit vehicles require a drive system which can move the doors along curved paths. When such a door is in its closed position, it is substantially flush with the side wall of the vehicle. When it is opened, it initially moves outward and then moves longitudinally, along the wall, outside the vehicle. Such doors, generally, are guided in that curved motion by rollers engaging a curved track.
A drive for such a door system includes a motor connected to a power conversion unit which applies motive power in both the outward and longitudinal directions, so that the door travels along the curved track.
FIG. 1 is an elevation view from outside of a transit vehicle having plug doors which are in their closed positions.
FIG. 2 is an outside elevation view of a portion of a transit vehicle having plug doors which are in their opened positions.
FIG. 3 is a horizontal section taken along line 3—3 in FIG. 1 showing the doors in their closed positions within the sidewall of the vehicle.
Prior to proceeding to the much more detailed description of the present invention, it should be noted that identical components which have identical functions have been identified with identical reference numerals throughout the several views illustrated in the drawing figures for the sake of clarity and understanding of the invention.
In applications where the requirements are not specified it may be desirable to utilize a pneumatic drive mover.
Attention is now directed to FIGS. 1 through 4 which illustrate the application to which the presently preferred embodiment of the invention is directed.