Claims
- 1. A movable step apparatus comprising:
a) a frame; b) an inner step member operatively mounted to said frame, said inner step member including a substantially horizontally disposed upper surface; c) a middle step member operatively mounted to said frame, said middle step member including a substantially horizontally disposed upper surface; d) an outer step member operatively mounted to said frame, said outer step member including a substantially horizontally disposed upper surface; e) a drive mechanism operatively associated with said inner, middle and outer step members for varying a vertical position of said inner, middle and outer step members between a first position wherein said inner, middle and outer step members are at different vertical elevations, to a second position wherein said inner, middle and outer step members are substantially coplanar, while maintaining said substantially horizontally disposed upper surfaces of said inner, middle and outer step members respectively in a substantially horizontal plane; f) at least one first linkage pivotally connecting said inner step member and said middle step member to said frame; and g) at least one second linkage pivotally connecting said outer step member to said middle step member.
- 2. A movable step apparatus according to claim 1, wherein said drive mechanism is a pneumatic prime mover.
- 3. A movable step apparatus according to claim 1, wherein said drive mechanism is an electric prime mover.
- 4. A movable step apparatus according to claim 1, wherein said drive mechanism is a hydraulic prime mover.
- 5. A movable step apparatus according to claim 1, wherein said at least one first linkage is a plurality of first linkages disposed at each end of said inner step member and at each end of said middle step member.
- 6. A movable step apparatus according to claim 1, wherein said at least one second linkage is a plurality of second linkages disposed at each end of said middle step member and at each end of said outer step member.
- 7. A passenger ingress and egress system disposed within a transit vehicle for accommodating a street platform disposed approximately 8 inches above top of rail and further accommodating a commuter platform disposed approximately 50 inches above the top of rail, said vehicle including a stairwell cavity disposed within a floor surface, said vehicle further including a door portal aperture disposed adjacent said stairwell cavity, said transit vehicle additionally including a door cavity disposed between an outer vehicle wall and an inner vehicle wall, said door cavity further disposed at each end of said door portal aperture, said passenger ingress and egress system comprising:
(a) a first door for at least partially covering and uncovering said door portal aperture, said first door disposed for substantially linear movement within said door portal aperture to its closed position, said first door further disposed for substantially linear movement within said door cavity to its open position; (b) a second door for at least partially covering and uncovering said door portal aperture, said second door disposed adjacent said first door, said second door disposed for substantially linear movement within said door portal aperture to its closed position, said second door further disposed for substantially linear movement within said door cavity to its open position; (c) a movable step apparatus disposed within said stairwell cavity, said movable step apparatus for facilitating ingress and egress of passengers to and from said transit vehicle from and onto said street platform, said movable step apparatus further facilitating ingress and egress of passengers to and from said transit vehicle from and onto said commuter platform, said movable step apparatus disposed adjacent said first door, said movable step apparatus further disposed adjacent said second door; and (d) a gap reduction apparatus disposed within said movable step apparatus for reducing a gap between said commuter platform and said movable step apparatus.
- 8. A passenger ingress and egress system according to claim 7, wherein said movable step apparatus comprising:
a) a frame; b) an inner step member operatively mounted to said frame, said inner step member including a substantially horizontally disposed upper surface; c) a middle step member operatively mounted to said frame, said middle step member including a substantially horizontally disposed upper surface; d) an outer step member operatively mounted to said frame, said outer step member including a substantially horizontally disposed upper surface; e) a drive mechanism operatively associated with said inner, middle and outer step members for varying the vertical position of said inner, middle and outer step members between a first position wherein said inner, middle and outer step members are at different vertical elevations to enable ingress and egress of passengers to and from said transit vehicle from and onto said street platform, to a second position wherein said inner, middle and outer step members are substantially coplanar with said floor surface of the transit vehicle to enable ingress and egress of passengers to and from said transit vehicle from and onto said commuter platform, while maintaining said substantially horizontally disposed upper surfaces of said inner, middle and outer step members respectively in a substantially horizontal plane; f) at least one first linkage pivotally connecting said inner step member and said middle step member to said frame; and g) at least one second linkage pivotally connecting said outer step member to said middle step member.
- 9. A passenger ingress and egress system according to claim 8, wherein said drive mechanism is a pneumatic prime mover.
- 10. A passenger ingress and egress system according to claim 8, wherein said drive mechanism is an electric prime mover.
- 11. A passenger ingress and egress system according to claim 8, wherein said drive mechanism is a hydraulic prime mover.
- 12. A passenger ingress and egress system according to claim 8, wherein said at least one first linkage is a plurality of first linkages disposed at each end of said inner step member and at each end of said middle step member.
- 13. A passenger ingress and egress system according to claim 8, wherein said at least one second linkage is a plurality of second linkages disposed at each end of said middle step member and at each end of said outer step member.
- 14. A passenger ingress and egress system according to claim 7, wherein said gap reduction apparatus includes:
(a) a gap reduction member having a horizontally disposed stepping surface, said gap reduction member movable in a substantially horizontal plane, said gap reduction member further movable in a direction substantially perpendicular to a linear movement path of said first door, said gap reduction member further movable in a direction substantially perpendicular to a linear movement path of said second door; and (b) a drive mechanism for moving said gap reduction member in a substantially horizontal plane.
- 15. A passenger ingress and egress system according to claim 14, wherein drive mechanism is a pneumatic prime mover.
- 16. A passenger ingress and egress system according to claim 14, wherein drive mechanism is an electric prime mover.
- 17. A passenger ingress and egress system according to claim 14, wherein drive mechanism is a hydraulic prime mover.
- 18. A passenger ingress and egress system disposed within a transit vehicle for accommodating a street platform and further accommodating a commuter platform, said vehicle including a stairwell cavity disposed within a floor surface, said vehicle further including a door portal aperture disposed adjacently said stairwell cavity, said transit vehicle additionally including a door cavity disposed between an outer vehicle wall and an inner vehicle wall, said door cavity further disposed at each end of said door portal aperture, said passenger ingress and egress system comprising:
(a) a door for covering and uncovering said aperture, said door disposed for substantially linear movement within said door portal aperture to its closed position, said door further disposed for substantially linear movement within said door cavity to its open position; (b) a movable step apparatus disposed within said stairwell cavity, said movable step apparatus being for facilitating ingress and egress of passengers to and from said transit vehicle from and onto said street platform, said movable step apparatus facilitating ingress and egress of passengers to and from said transit vehicle from and onto said commuter platform, said movable step apparatus disposed adjacent said door; and (c) a gap reduction apparatus disposed within said movable step apparatus for reducing a gap between said commuter platform and said movable step apparatus.
- 19. A passenger ingress and egress system according to claim 18, wherein said movable step apparatus includes:
a) a frame; b) an inner step member operatively mounted to said frame, said inner step member including a substantially horizontally disposed upper surface; c) a middle step member operatively mounted to said frame, said middle step member including a substantially horizontally disposed upper surface; d) an outer step member operatively mounted to said frame, said outer step member including a substantially horizontally disposed upper surface; e) a drive mechanism operatively associated with said inner, middle and outer step members for varying a vertical position of said inner, middle and outer step members between a first position wherein said inner, middle and outer step members are at different vertical elevations to enable ingress and egress of passengers to and from said transit vehicle from and onto said street platform, to a second position wherein said inner, middle and outer step members are substantially coplanar with said floor surface of said transit vehicle to enable ingress and egress of passengers to and from said transit vehicle from and onto said commuter platform, while maintaining said substantially horizontally disposed upper surfaces of said inner, middle and outer step members respectively in a substantially horizontal plane; f) at least one first linkage pivotally connecting said inner step member and said middle step member to said frame; and g) at least one second linkage pivotally connecting said outer step member to said middle step member.
- 20. A passenger ingress and egress system according to claim 19, wherein said drive mechanism is a pneumatic prime mover.
- 21. A passenger ingress and egress system according to claim 19, wherein said drive mechanism is an electric prime mover.
- 22. A passenger ingress and egress system according to claim 19, wherein said drive mechanism is a hydraulic prime mover.
- 23. A passenger ingress and egress system according to claim 19, wherein said at least one first linkage is a plurality of first linkages disposed at each end of said inner step member and at each end of said middle step member.
- 24. A passenger ingress and egress system according to claim 19, wherein said at least one second linkage is a plurality of second linkages disposed at each end of said middle step member and at each end of said outer step member.
- 25. A passenger ingress and egress system according to claim 18, wherein said gap reduction apparatus including:
(a) a gap reduction member having a horizontally disposed stepping surface, said gap reduction member movable in a substantially horizontal plane, said gap reduction member further movable in a direction substantially perpendicular to a linear movement path of said door; and (b) a drive mechanism for moving said gap reduction member in the substantially horizontal plane.
- 26. A passenger ingress and egress system according to claim 25, wherein drive mechanism is a pneumatic prime mover.
- 27. A passenger ingress and egress system according to claim 25, wherein drive mechanism is an electric prime mover.
- 28. A passenger ingress and egress system according to claim 25, wherein drive mechanism is a hydraulic prime mover.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is related to and claims priority from U.S. Provisional Patent Application Serial No. 60/336,777 filed on Nov. 12, 2001. This application is also related to the invention disclosed in U.S. Pat. No. 3,957,284 titled “Movable steps for transit vehicle”. The teachings of U.S. Pat. No. 3,957,284 are incorporated into this document by reference thereto.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60336777 |
Nov 2001 |
US |