Railways: surface track – Rail seats – Cushions
Patent
1990-11-16
1992-11-24
Huppert, Michael S.
Railways: surface track
Rail seats
Cushions
238382, 238336, E01B 962
Patent
active
051655985
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
Cross-Reference to Related Application
This application is a National Phase of Patent EP 89,/00,607 filed May 30, 1989 and based, in turn, upon German National application G 88 07 195.2 filed Jun. 1, 1988 under the International Convention.
The invention relates to a resiliently mounted rail for rail vehicles, wherein the laterally limiting surfaces located below the rail head abut against the inner lateral surfaces of a frame, flanking the rail whereby in the area of abutment the lateral limiting surfaces of the rail and/or the inner lateral surfaces of the frame are subdivided into two segments--a lower and an upper segment--each of them tapering downwardly.
BACKGROUND OF THE INVENTION
In known rails of the aforementioned kind, the shape of the characteristic curve resulting from the presence of the elastic intermediate layer when the rail is under load is solely determined by the characteristics of the material of the elastic intermediate layer. This is particularly disadvantageous in a rail with standard rail profile (U.S. Pat. No. 3,525,472), because here the angle formed by the lateral limiting surfaces of the rail below the rail head with the vertical is very large in the upper segment and very small in the lower segment, so that when the characteristic curve for the vertical load of the rail is correctly established, the elastic intermediate layers are too hard for the horizontally occurring load, while when the characteristic curve for the horizontal load of the rail is correctly established, the elastic intermediate layers are too soft for the vertical load. Therefore, in practice there is always a compromise solution, which does not offer an optimal shape of the characteristic curve in any load direction. In a rail of this type, the sound attenuation is extraordinarily low.
An improved sound damping is achieved with another known rail, wherein in the area of the rail web a rectilinearly downward tapering area is provided, over which the rail abuts against a frame via elastic intermediate layers, the inner lateral surfaces of the frame running also rectilinearly (DE-OS 35 40 128). In this rail, the lateral surfaces limiting the rail below the rail head, as well as the inner lateral surfaces limiting the frame form respectively only one angle with the vertical. This allows for a more correct setting of the characteristic curve.
OBJECT OF THE INVENTION
It is the object of the invention to improve a rail of the aforementioned kind, so that it is possible to establish an optimal characteristic curve for each application and in a way which is superior to the aforementioned known rail.
SUMMARY OF THE INVENTION
According to this invention, in the upper segment the lateral limiting surfaces of the rail form with the vertical an angle ranging between 0.degree. and 10.degree., in the lower segment the lateral limiting surfaces of the rail form with the vertical an angle ranging between 15.degree. and 30.degree. and the inner lateral limiting surfaces of the frame form with the vertical an angle ranging between 5.degree. and 30.degree..
According to a feature of the invention, the inner lateral limiting surfaces of the frame form an angle with the vertical, which ranges between 15.degree. and 40.degree., in the lower segment, the inner lateral surfaces of the frame form an angle with the vertical ranging between 0.degree. and 10.degree., and the lateral limiting surfaces of the rail form with the vertical an angle between 0.degree. and 30.degree..
This selection of angles in the upper and lower segments of the lateral limiting surfaces makes it possible to establish to a large extent an optimal characteristic curve.
The angles can be so selected that the angle formed in the upper segment by the surfaces defining the rail and the vertical equals approximately 3.degree., the angle formed in the lower segment by the surfaces defining the rail with the vertical equals approximately 20.degree., and the angle formed by the inner lateral limiting surfaces of the frame with the v
REFERENCES:
patent: 223052 (1879-12-01), Mack
patent: 2670136 (1954-02-01), Moses
patent: 3295760 (1967-01-01), Moses
patent: 3358927 (1967-12-01), Hein et al.
patent: 3387781 (1968-06-01), Moses et al.
patent: 3417922 (1968-12-01), Dargier
patent: 3525472 (1970-08-01), Sato
patent: 3826423 (1974-07-01), McClung
patent: 3945566 (1976-03-01), Bush
patent: 4527736 (1985-07-01), Ortwein
patent: 4775103 (1988-10-01), Ortwein
Dubno Herbert
Eller James
Huppert Michael S.
Ortwein Hermann
LandOfFree
Resiliently mounted rail for rail vehicles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Resiliently mounted rail for rail vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resiliently mounted rail for rail vehicles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-918094