Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Reexamination Certificate
2001-03-15
2002-12-10
Schwartz, Christopher P. (Department: 3613)
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
C303S127000, C188S107000, C188S170000
Reexamination Certificate
active
06491352
ABSTRACT:
BACKGROUND
The present invention relates generally to rail cars for an integral/semi-integral intermodal train employing a segmented roll-on/roll-off system. More particularly, the rail cars can be connected together to form segments of an integral train for carrying freight, such as semi-trailers, wherein each train segment has an integrated arrangement composed of different types of rail car platforms, including an adapter platform, intermediate platforms and a loading ramp platform. The present invention relates, in particular, to an apparatus for the automatic application and release of parking brakes for the rail cars. An intermodal train platform system is described in applicants co-pending application Ser. No. 09/252,204 filed Feb. 22, 1999, which is hereby incorporated by reference herein in its entirety.
SUMMARY
Adapter, intermediate and ramp platform rail car platforms are provided for forming an intermodal train for carrying standard over-the-highway semi-trailers. The intermodal train can have a standard locomotive pulling one or more identical train segments. Each segment can have eleven or more platforms and may be loaded or unloaded independently of any other segment using a self contained, roll-on/roll-off system. This system can have an integral ramp on at least one end of each segment, for use by a hostler tractor and/or the semi-trailers as they are being loaded or unloaded. The platforms which make up each segment can be connected by articulated joints so as to eliminate longitudinal slack and reduce costs. At least one platform should be equipped with a standard knuckle coupler at standard height to permit the segments to be pulled by any existing locomotive.
In order to permit carriage of non-railroad trailers, a very good ride quality is required; and this can be provided by premium trucks and a low 36½ inch deck height, both of which combine to permit stable operation at high speed. High speed operation is also made possible by a brake system providing actual train average braking ratios of eighteen percent nearly double that available with standard equipment. Use of this braking system can permit the Steel Turnpike to operate at speeds thirty percent higher than AAR standard freight trains, while stopping within the same distance.
Several sub-systems intended to speed performance and enhance reliability can be provided on each segment. These are the “Electronic Assisted Air Brake,” “Health Monitoring” and “Trailer Tie-Down” subsystems. A “Locomotive Interface Unit” subsystem is also required if former subsystems are to be used to best effectiveness.
In a preferred embodiment of the present invention a spring applied, air released parking brake is provided for the intermodal train. The parking brake is only permitted to apply when normal air brake cylinder pressure is lost, and preferably only to a degree approximating the loss of normal full service brake cylinder pressure. Manual release of the parking brake is provided should it become necessary or desirable to move a rail car without first charging the brake pipe.
Other details, objects, and advantages of the invention will become apparent from the following detailed description and the accompanying drawing Figures of certain embodiments thereof.
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Buchanan Ingersoll P.C.
Kramer Devon
Schwartz Christopher P.
Westinghouse Air Brake Technologies Corporation
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