Back to results
US 10,589,759 B2Granted
Railway car truck friction shoe
AssigneeAmsted Rail Company, Inc.
InventorJohn Coseglia
Life of this patent
Estimating the term…
Abstract
A friction shoe includes a bottom base engaging and supported by a pair of support springs, and a sloped wall engaging the sloped support face of a bolster. The bottom base includes a cylindrical spring lug that has a center opening that extends through the spring lug. The bottom surface of the spring lug is flat and smooth and is configured to engage an additional concentrically nested support spring. The additional spring increases the force between the vertical support face of the wedge and the vertical wear plate of the side frame.
Claims20
A railway car truck comprising:
- two parallel side frames, each side frame having at least one vertical support face:
- a suspension spring assembly supported by the side frames;
- a bolster transversely mounted between the side frames and supported by the suspension spring assembly, the bolster having at least one sloped support face;
- an outer suspension spring;
- a first inner suspension spring that is concentric with the outer suspension spring;
- a second inner suspension spring that is concentric with the outer suspension spring and the first inner suspension spring, wherein the outer suspension spring, the first inner suspension spring, and the second inner suspension spring are concentrically nested;
- and
- a friction shoe comprising:
- two laterally spaced sloped walls each engaging one sloped support face of the bolster;
- a vertical wall engaging the vertical support face of the side frame;
- a bottom base engaging and supported by the outer suspension spring, the first inner suspension spring, and the second inner suspension spring, the bottom base including a cylindrical spring lug extending downwardly therefrom, the cylindrical spring lug having a center opening leading into a hollow area of the friction shoe and having a smooth flat bottom surface which engages the second inner suspension spring.
8 more elements
A railway car truck, the railway car truck comprising:
- an outer suspension spring;
- a first inner suspension spring that is concentric with the outer suspension spring;
- a second inner suspension spring that is concentric with the outer suspension spring and the first inner suspension spring, wherein the outer suspension spring, the first inner suspension spring, and the second inner suspension spring are concentrically nested;
- and
- a friction shoe comprising:
- a bottom base engaging and supported by the outer suspension spring, the first inner suspension spring, and the second inner suspension spring, the bottom base including a cylindrical spring lug extending downwardly therefrom, the cylindrical spring lug having a bottom surface that engages the second inner suspension spring;
- a sloped wall configured to engage a sloped support face of a bolster;
- and
- a vertical wall configured to engage a vertical support face of a side frame.
6 more elements
A railway car truck, comprising:
- an outer suspension spring;
- a first inner suspension spring that is concentric with the outer suspension spring;
- a second inner suspension spring that is concentric with the outer suspension spring and the first inner suspension spring, wherein the outer suspension spring, the first inner suspension spring, and the second inner suspension spring are concentrically nested;
- and
- a friction shoe comprising:
- a bottom base engaging the outer suspension spring, the first inner suspension spring, and the second inner suspension spring, the bottom base including a spring lug extending downwardly therefrom, the spring lug comprising:
- a hollow opening extending vertically through the spring lug;
- and
- a flat bottom surface, wherein the flat bottom surface provides a support surface that engages the second inner suspension spring.
6 more elements
Dependencies are inferred from the claim text.