US4368845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad crossing structure
Assignee: PARK RUBBER COMPANY A CORP OF
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Filing: 1981-03-02
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Granted: 1983-01-18
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Expires: 2001-03-02
Abstract
Abstract A railroad crossing structure for providing an improved devil strip. In particular, the invention proposes to bridge the span between adjacent sets of tracks with bridge members of steel or other like material of sufficient strength and rigidity. These bridge members preferably correspond in number to the ties supporting the rails in the area of the crossing, and are secured to them in any suitable fashion. The bridge members may be leveled to provide a flat horizontal surface by notching the ties to receive the ends of the bridge members. The space between the ends of the bridge members and the rails are filled with shims. Thereafter, an elastomeric surface is provided atop the bridge members, using elastomeric pads preferably of the type disclosed in the above-mentioned U.S. Pat. No. 4,093,120. Elastomeric pads of the type disclosed in this patent are preferred since the pads can be easily affixed atop the bridge members because no spikes are required. When the area between the rails is provided with similar elastomeric pads as disclosed in this patent, the resulting railroad crossing structure is entirely covered with an elastomeric surface.
Inventors
- 👤 John A. Perry
- 👤 Frank M. Perry
- 👤 Gerald P. Konczyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
A railroad crossing structure for use with a highway railroad crossing having at least two sets of tracks with a devil strip between them, each of said sets of tracks having a pair of spaced, substantially parallel rails, a plurality of elongated ties subtending and supporting said rails and being disposed transversely thereof, each of said plurality of elongated ties being comprised of a short tie extending beneath said pair of rails of one set of tracks and a longer tie which spans said devil strip and extends beneath said pair of rails of the other one of said set of tracks, the positioning of said short tie and said longer tie of each adjacent elongated tie being alternated, whereby a unitary crossing structure is provided, means for securing said rails to said ties, and a plurality of elastomeric pads secured atop and supported by said ties, said plurality of elastomeric pads being proportioned to span said devil strip and to abut against the one rail of each track adjacent said devil strip, whereby the devil strip between adjacent sets of tracks is provided with an elastomeric surface.
Claim 2
Dependent Claim
188 words
A railroad crossing structure for use with a highway railroad crossing having at least two sets of tracks with a devil strip between them, each of said sets of tracks having a pair of spaced, substantially parallel rails, a plurality of elongated ties subtending and supporting said rails and being disposed transversely thereof, each of said plurality of elongated ties being comprised of a short tie extending beneath said pair of rails of one set of tracks and a longer tie which spans said devil strip and extends beneath said pair of rails of the other one of said set of tracks, the positioning of said short tie and said longer tie of each adjacent elongated tie being alternated, whereby a unitary crossing structure is provided, means for securing said rails to said ties, and a plurality of elastomeric pads secured atop and supported by said ties, said plurality of elastomeric pads being proportioned to span said devil strip and to abut against the one rail of each track adjacent said devil strip, whereby the devil strip between adjacent sets of tracks is provided with an elastomeric surface.
Claim 3
Dependent Claim
39 words
The railroad crossing structure of claim 1, further comprising shim means atop said ties and disposed between said rails, whereby a flat support surface extending substantially from rail-to-rail across said devil strip is provided to support said elastomeric pads.
Claim 4
Dependent Claim
96 words
The railroad crossing structure of claim 2, wherein each of said elastomeric pads has a flexible plate of a generally concave cross-section imbedded within it, securement means affixed to the opposite sides of said flexible plate along the longitudinal edges thereof and tie down means extending longitudinally through said elastomeric pad and secured respectively to the opposite side edges of said flexible plate by means of said securement means; and anchor means for securing said elastomeric pads atop said bridge members, said tie down means being secured at the opposite ends thereof to said anchor means.
Claim 5
Dependent Claim
39 words
The railroad crossing structure of claim 3, wherein the adjoining edges of said elastomeric pads are formed with complimentary interlocking means, whereby the edges of said pads abutted and secured together are sealed so as to be substantially moisture-proof.
Claim 6
Dependent Claim
36 words
The railroad crossing structure of claim 3, further comprising a plurality of said elastomeric pads in end-to-end relationship, said tie down means extending longitudinally through said pads in end-to-end relationship to secure said pads in place.
Claim 7
Dependent Claim
40 words
The railroad crossing structure of claim 5, wherein the abutting edges of said pads all are correspondingly formed with complimentary interlocking means, whereby the edges of said pads abutted and secured together are sealed so as to be substantially moisture-proof.
Claim 8
Dependent Claim
16 words
The railroad crossing structure of claim 3, wherein said tie down means comprises a steel cable.
Claim 9
Dependent Claim
16 words
The railroad crossing structure of claim 3, wherein said tie down means comprises a steel rod.
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |