US4147304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad crossing and process for fabrication thereof
Assignee: Individual
•
Filing: 1977-05-23
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Granted: 1979-04-03
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Expires: 1997-05-23
Abstract
Abstract This invention relates to concrete railroad crossings and a process of constructing such railroad crossings which are essentially isolated from all moving parts of the rail system through the employment of compressible foam material to separate the surface of the rails, ties, and other track handware normally in direct contact with a concrete crossing. The crossing is supported on the sub-grade between the rail ties.
Inventors
- 👤 Benjamin G. Blyton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:46
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A method of constructing a concrete roadway crossing for a railroad comprising the steps of, installing on both sides of each rail a layer of polyethylene or polyurethane compressible foam material having a minimal two pound foam density along the rail flangeways, rail ties, and track hardware, so as to fully cover those portions thereof normally exposed to direct contact with the concrete crossing, said layer precluding direct contact between the concrete of said concrete crossing and the rails and ties, leveling the rail bed so that the land area between the ties is coplanar with the top surface of the tie, pouring concrete over both the ties and the rail bed therebetween in the area defined by the rails and in the area defined by the rails and adjacent roadway, said concrete making direct contact with the land area between the ties and the layer of compressible foam material, allowing the concrete crossing thus constructed and being supported only on the land area between the ties to harden to traffic bearing strength.
Claim 2
Independent Claim
173 words
A method of constructing a concrete roadway crossing for a railroad comprising the steps of, installing on both sides of each rail a layer of polyethylene or polyurethane compressible foam material having a minimal two pound foam density along the rail flangeways, rail ties, and track hardware, so as to fully cover those portions thereof normally exposed to direct contact with the concrete crossing, said layer precluding direct contact between the concrete of said concrete crossing and the rails and ties, leveling the rail bed so that the land area between the ties is coplanar with the top surface of the tie, pouring concrete over both the ties and the rail bed therebetween in the area defined by the rails and in the area defined by the rails and adjacent roadway, said concrete making direct contact with the land area between the ties and the layer of compressible foam material, allowing the concrete crossing thus constructed and being supported only on the land area between the ties to harden to traffic bearing strength.
Claim 3
Dependent Claim
86 words
A railroad grade crossing consisting of; A. a railroad crossing base or sub-grade, B. superimposed on the base, a set of rails, ties, and track hardware which secure said rails to said ties, C. a compressible foam material covering the entire top surfaces of all rail ties and covering the entire rail flangeways, including said track hardware and, D. paving material constituting the upper surface of said grade crossing, said paving material positioned over the compressible foam and supported solely by the sub-grade between the ties.
Claim 4
Dependent Claim
86 words
A railroad grade crossing consisting of; A. a railroad crossing base or sub-grade, B. superimposed on the base, a set of rails, ties, and track hardware which secure said rails to said ties, C. a compressible foam material covering the entire top surfaces of all rail ties and covering the entire rail flangeways, including said track hardware and, D. paving material constituting the upper surface of said grade crossing, said paving material positioned over the compressible foam and supported solely by the sub-grade between the ties.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |