US3784098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail fastening
Assignee: Traverses En Beton Arme Systeme Vagneux SA
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Filing: 1972-07-03
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Granted: 1974-01-08
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Expires: 1992-07-03
Abstract
Abstract A rail fastening comprises a resilient U-shaped clip the base of which is supported against the sleeper with the free outer ends of the clip arms engaging the rail foot. Holding down means acting against an intermediate portion of the arms stresses the clip to clamp the rail foot. The intermediate arm portions are circularly curved in a vertical plane, and the holding down means engaging the curved portions has a complementary shape. This enables greater deflection of the clip for a given clamping pressure. The outer end portions are flattened where they engage the rail foot.
Inventors
- 👤 M Serafin
- 👤 M Decubber
- 👤 B Oise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:39
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/02; E01B9/28; E01B9/30; E01B9/303
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A rail fastening comprising a resilient rail clip which is substantially U-shaped in plan and comprises a base portion engageable with a sleeper mounting and two arms extending laterally away from the base portion, the free outer end portions of which arms are engageable with the rail foot, wherein a portion of each arm intermediate its free outer end portion and the base portion of the clip is substantially circularly curved in a vertical plane for engaging holding down means of complementary shape, and each said outer end portion narrows in thickness and increases in widths from adjacent the said intermediate portion towards the outer free end, a plane extending tangentially from the lower faces of the said free outer end portions passing above the said base portion when the clip is in unstressed condition.
Claim 2
Dependent Claim
135 words
A rail fastening comprising a resilient rail clip which is substantially U-shaped in plan and comprises a base portion engageable with a sleeper mounting and two arms extending laterally away from the base portion, the free outer end portions of which arms are engageable with the rail foot, wherein a portion of each arm intermediate its free outer end portion and the base portion of the clip is substantially circularly curved in a vertical plane for engaging holding down means of complementary shape, and each said outer end portion narrows in thickness and increases in widths from adjacent the said intermediate portion towards the outer free end, a plane extending tangentially from the lower faces of the said free outer end portions passing above the said base portion when the clip is in unstressed condition.
Claim 3
Dependent Claim
41 words
A rail fastening according to claim 1 wherein the said tangential plane makes an angle of between about 3* and about 12* with a plane containing the upper surface of the said base portion when the clip is in unstressed condition.
Claim 4
Dependent Claim
14 words
A rail fastening according to claim 2 wherein the said angle is approximately 10*.
Claim 5
Dependent Claim
83 words
A rail fastening according to claim 1, wherein the holding down means comprises a sleeper bolt and a bearing member engageable with the said circularly curved intermediate arm portions, and a nut on said bolt for urging said bearing member against said clip for stressing said clip, abutments means provided on the sleeper engaging said circularly curved intermediate portions of said arm from the side opposite said bearing means to predetermine the clamping force developed by said clip when said nut is tightened.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |