Isolation mounting system for railroad car steps and running boards
AssigneeRailroad Steps & Boards, LLC
InventorJohn R. Perry, Jr.
Life of this patent
Estimating the term…
Abstract
A mounting system is provided for securing a metal support surface to a metal bracket on a railroad car. The invention is improved by a compressible, energy absorbing arrangement secured intermediate the support surface and the bracket for preventing metal to metal contact between the support surface and the bracket and absorbing vibrational energy caused by movement of the railroad car.
Claims11
A mounting system for securing a support surface to a railroad car to isolate the support surface from the twisting and vibration of the railroad car to reduce fatigue of the support surface, the mounting system comprising:
- a plurality of compressible, energy absorbing bushings positioned between the support surface and the railroad car such that the support surface is spaced from the railroad car by the plurality of bushings;
- and
- a plurality of bolts each associated with one of the bushings, each bolt having an expanded head and a depending shaft, the expanded head being positioned above the support surface and in operative contact with the bushing to isolate the bolt from the support surface, depending shaft extending through the support surface and secured to the railroad car such that the combination of the plurality of bolts and bushings secure the support surface to the railroad car,
- wherein the plurality of bolts compress the plurality of bushings between the support surface and the railroad car and the plurality of bushings are each further compressed upon relative movement between the support surface and the railroad car to isolate the support surface from the railroad car.
A mounting system for securing a support surface to a bracket on a railroad car to isolate the support surface from the twisting and vibration of the railroad car to reduce the fatigue of the support surface, the mounting system comprising:
- a plurality of compressible, energy absorbing bushings positioned between the support surface and the railroad car, each bushing having an upstanding neck protruding through an opening formed in the support surface;
- and
- a plurality of bolts each associated with one of the bushings, each bolt having an expanded head and a depending threaded shaft, the expanded head being positioned in operative contact with the upstanding neck of the bushing to isolate the bolt from the support surface, the threaded shaft extending through the upstanding neck of the bushing and the support surface, the threaded shaft being secured to the railroad car to secure the support surface and the bushing to the railroad car,
- wherein the expanded head of the boll is spaced from the support surface by the upstanding neck of the bushing such that the plurality of bolts compress the plurality of bushings between the support surface and the railroad car and the plurality of bushings are further compressed upon relative movement between the support surface and the railroad car to isolate the support surface from the railroad car.
Dependencies are inferred from the claim text.