US3866830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric railroad crossing structure
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1973-09-07
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Granted: 1975-02-18
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Expires: 1993-09-07
Abstract
Abstract A railroad crossing structure which includes a plurality of elongated center section pad members and a plurality of elongated outside field section pad members. The pad members are of width substantially the same as the center spacing between adjacent cross ties which are fastened to and span adjacent cross ties. Each pad member comprises an elongated arch member having horizontal flanges extending along each side of the arch member which is adapted for respective connection to adjacent cross ties with the longitudinal axis of the arch member disposed substantially parallel to the axes of the ties. A plurality of tension support rods are connected in chordal position across the arch of the arch member and along the flanges which are adapted to support the arch member against spreading with consequent vertical deflection when a vertical load is imposed downwardly on the arch member. A rectangular elastomeric pad body corresponding in shape to the length and width of the arch member and flanges is bonded to the upper surfaces and the arch member.
Inventors
- 👤 Richard D Hein
- 👤 Gary L Fordyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/04
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
128 words
An elastomeric railroad crossing pad member comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch, B. said arch member being of width substantially the same as the center spacing of adjacent railroad ties, C. said arch member being adapted for respective connection through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties, D. a plurality of tension support means connected in chordal relation across the arch of said arch member and along the tops of said flanges, and E. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of sAid arch and said flanges.
Claim 2
Dependent Claim
128 words
An elastomeric railroad crossing pad member comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch, B. said arch member being of width substantially the same as the center spacing of adjacent railroad ties, C. said arch member being adapted for respective connection through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties, D. a plurality of tension support means connected in chordal relation across the arch of said arch member and along the tops of said flanges, and E. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of sAid arch and said flanges.
Claim 3
Dependent Claim
18 words
The pad member of claim 1 wherein said tension support means comprise carriage bolts connected across said arch.
Claim 4
Dependent Claim
18 words
The pad member of claim 1 wherein said tension support means comprise tie rods connected across said arch.
Claim 5
Dependent Claim
13 words
The pad member of claim 1 wherein said elastomeric pad body is neoprene.
Claim 6
Dependent Claim
16 words
The pad member of claim 1 wherein said elastomeric pad body is of 50-70 durometer hardness.
Claim 7
Dependent Claim
18 words
The pad member of claim 1 wherein grooves are defined in a longitudinal direction along said upper surface.
Claim 8
Dependent Claim
24 words
The pad member of claim 1 further including filler pads of selected thickness adapted to be disposed between said flanges and said railroad ties.
Claim 9
Dependent Claim
15 words
The pad member of claim 1 wherein the ends of said arch are beveled inwardly.
Claim 10
Dependent Claim
189 words
A railroad crossing structure including a plurality of elastomeric center section pad members and a plurality of elastomeric field section pad members with each pad member of said pad members comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch; B. said arch member being of width substantially the same as the center spacing of adjacent railroad ties; C. said arch member being respectively connected through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties; D. a plurality of tension support means connected in chordal relation across the arch of said arch member; E. said tension support means being adapted to support said arch against spreading responsive to imposition of a vertical load downwardly on said arch member; F. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of said arch and said flanges; and G. the arrangement being such that a mutual reinforcing and vertical load bearing relationship is established by adjacent said pad members.
Claim 11
Dependent Claim
189 words
A railroad crossing structure including a plurality of elastomeric center section pad members and a plurality of elastomeric field section pad members with each pad member of said pad members comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch; B. said arch member being of width substantially the same as the center spacing of adjacent railroad ties; C. said arch member being respectively connected through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties; D. a plurality of tension support means connected in chordal relation across the arch of said arch member; E. said tension support means being adapted to support said arch against spreading responsive to imposition of a vertical load downwardly on said arch member; F. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of said arch and said flanges; and G. the arrangement being such that a mutual reinforcing and vertical load bearing relationship is established by adjacent said pad members.
Claim 12
Dependent Claim
17 words
The structure of claim 9 wherein said tension support means comprise carriage bolts connected across said arch.
Claim 13
Dependent Claim
17 words
The structure of claim 9 wherein said tension support means comprise tie rods connected across said arch.
Claim 14
Dependent Claim
12 words
The structure of claim 9 wherein said elastomeric pad body is neoprene.
Claim 15
Dependent Claim
15 words
The structure of claim 9 wherein said elastomeric pad body is of 50-70 durometer hardness.
Claim 16
Dependent Claim
17 words
The structure of claim 9 wherein grooves are defined in a longitudinal direction along said upper surface.
Claim 17
Dependent Claim
20 words
The structure of claim 9 further including filler pads of selected thickness disposed between said flanges and said railroad ties.
Claim 18
Dependent Claim
15 words
The crossing structure of claim 9 wherein the ends of said arch are beveled inwardly.
Claim 19
Dependent Claim
145 words
An elastomeric railroad crossing pad member comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch, B. said arch member being adapted for respective connection through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties, C. a plurality of tension support means connected in chordal relation across the arch of said arch member and along the tops of said flanges. D. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of said arch and said flanges, and E. said pad member being adapted to establish a mutual reinforcing and vertical load bearing relationship with another said pad member when the two said pad members are adjacently connected to a common railroad tie.
Claim 20
Dependent Claim
145 words
An elastomeric railroad crossing pad member comprising: A. an elongated arch member having an upwardly extending arch and including horizontal flanges extending from each side of said arch, B. said arch member being adapted for respective connection through said flanges to adjacent railroad ties with the longitudinal axis of said arch member disposed substantially parallel to the axes of said railroad ties, C. a plurality of tension support means connected in chordal relation across the arch of said arch member and along the tops of said flanges. D. an elastomeric pad body defining a horizontal upper surface and bonded to the upper surfaces of said arch and said flanges, and E. said pad member being adapted to establish a mutual reinforcing and vertical load bearing relationship with another said pad member when the two said pad members are adjacently connected to a common railroad tie.
Claim 21
Dependent Claim
15 words
The pad member of claim 17 wherein the ends of said arch are beveled inwardly.
Claim 22
Dependent Claim
18 words
The pad member of claim 17 wherein said tension support means comprise carriage bolts connected across said arch.
Claim 23
Dependent Claim
13 words
The pad member of claim 17 wherein said elastomeric pad body is neoprene.
Claim 24
Dependent Claim
16 words
ThE pad member of claim 17 wherein said elastomeric pad body is of 50-70 durometer hardness.
Claim 25
Dependent Claim
18 words
The pad member of claim 17 wherein grooves are defined in a longitudinal direction along said upper surface.
Claim 26
Dependent Claim
21 words
The pad member of claim 17 further including filler pads of selected thickness disposed between said flanges and said railroad ties.
Claim 27
Dependent Claim
18 words
The pad member of claim 17 wherein said tension support means comprise tie rods connected across said arch.
Claim 28
Dependent Claim
13 words
The pad member of claim 24 wherein said elastomeric pad body is neoprene.
Claim 29
Dependent Claim
18 words
The pad member of claim 25 wherein grooves are defined in a longitudinal direction along said upper surface.
Claim 30
Dependent Claim
24 words
The pad member of claim 26 further including filler pads of selected thickness adapted to be disposed between said flanges and said railroad tie.
Claim 31
Dependent Claim
16 words
The pad member of claim 27 wherein said elastomeric pad body is of 50-70 durometer hardness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |