US3827631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail mounting pad
Assignee: Syntex Rubber Corp
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Filing: 1972-12-29
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Granted: 1974-08-06
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Expires: 1992-12-29
Abstract
Abstract A pad for use in a rail mounting assembly to dampen the rail vibration while providing electrical insulation between a rail and a tie, particularly where positive retention of the pad against lateral slippage is accomplished independently of the means used to secure the rail to the tie. Retention against lateral slippage is provided by disposing embossments on the pad which mate into socket recesses in the tie. Wear, permanent set, and cracking are alleviated by disposing apertures through the embossments to interrupt the lateral propagation of the strain wave caused by compressive stress imposed on the rail mounting assembly from rolling train wheels. Dampening of rail vibration is supplemented by cooperatively configuring the embossments and the socket recesses to develop desired spring forces upon compression of the pad.
Inventors
- 👤 E Kirik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:30
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/68; E01B9/685; E01B9/686
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A mounting pad for interfacing between a rail and a tie, comprising: a bearing portion configured to locate under the rail within the parameters thereof, said bearing portion being compressible under stress to dampen rail vibration; and at least one embossment protruding from said bearing portion with an aperture extending through said embossment and said bearing portion, said embossment being configured to engage a socket recess in the tie for developing a bearing interface thereagainst in translating shear stress to retain said pad against lateral slip, said aperture allowing flow of compressed pad material into the socket recess and said embossment being arranged on said pad to interrupt propagation of a compressive strain wave thereacross.
Claim 2
Dependent Claim
115 words
A mounting pad for interfacing between a rail and a tie, comprising: a bearing portion configured to locate under the rail within the parameters thereof, said bearing portion being compressible under stress to dampen rail vibration; and at least one embossment protruding from said bearing portion with an aperture extending through said embossment and said bearing portion, said embossment being configured to engage a socket recess in the tie for developing a bearing interface thereagainst in translating shear stress to retain said pad against lateral slip, said aperture allowing flow of compressed pad material into the socket recess and said embossment being arranged on said pad to interrupt propagation of a compressive strain wave thereacross.
Claim 3
Dependent Claim
23 words
The pad of claim 1 wherein said embossment is cylindrically configured and develops a bearing interface of equal magnitude in any lateral direction.
Claim 4
Dependent Claim
32 words
The pad of claim 1 wherein said embossment is a rectangular strip and develops a bearing interface of greatest magnitude in a direction perpendicular to the longitudinal axis of said rectangular strip.
Claim 5
Dependent Claim
42 words
The pad of claim 1 wherein said embossment is configured to compress into the socket recess in proportion to compressive stress on the rail, said embossment developing a spring force when compressed to supplement the rail vibration dampening of said bearing portion.
Claim 6
Dependent Claim
15 words
The pad of claim 1 wherein a plurality of embossments protrude from said bearing portion.
Claim 7
Dependent Claim
43 words
The pad of claim 5 wherein said embossments are configured to compress into the socket recesses in proportion to compressive stress on the rail, each said embossment developing a spring force when compressed to supplement the rail vibration dampening of said bearing portion.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |