Patent US3315893A successfully refreshed from Google Patents.
US3315893A
Expired / Lapsed
US
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Electrically insulating supporting means for a railway rail
Assignee: ESAB AB
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Filing: 1964-09-25
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Granted: 1967-04-25
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Thornander Gote Christ Ingemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:28
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/68; E01B9/681; E01B9/683; B; B61; B61L; B61L3/00; B61L3/02; B61L3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A RAIL SUPPORTING UNIT COMPRISING A RAIL SUPPORTING PLATE, MEANS FOR ATTACHING THE RAIL TO SAID PLATE, A BASE PLATE ATTACHED TO A TRACK SUBSTRUCTURE, AND A RESILIENT AND ELECTRICALLY INSULATING BLOCK INTERPOSED BETWEEN SAID SUPPORTING PLATE AND SAID BASE PLATE, SAID BLOCK COMPRISING AT LEAST THREE SUPERIMPOSED MEMBERS INCLUDING TWO SHEETS OF INSULATING MATERIAL, AT LEAST ONE OF WHICH IS NATURAL OR ARTIFICIAL RUBBER, AND AN ELECTRICALLY CONDUCTING INTERMEDIATE MEMBER SEPARATING SAID SHEETS, THE EDGE OF SAID INTERMEDIATE MEMBER BEING EXPOSED THROUGHOUT ITS PERIMETER, SAID PLATES AND SAID AT LEAST THREE INTERPOSED MEMBERS BEING BONDED TO EACH OTHER TO FORM A COHERENT UNIT.
Claim 2
Dependent Claim
104 words
A RAIL SUPPORTING UNIT COMPRISING A RAIL SUPPORTING PLATE, MEANS FOR ATTACHING THE RAIL TO SAID PLATE, A BASE PLATE ATTACHED TO A TRACK SUBSTRUCTURE, AND A RESILIENT AND ELECTRICALLY INSULATING BLOCK INTERPOSED BETWEEN SAID SUPPORTING PLATE AND SAID BASE PLATE, SAID BLOCK COMPRISING AT LEAST THREE SUPERIMPOSED MEMBERS INCLUDING TWO SHEETS OF INSULATING MATERIAL, AT LEAST ONE OF WHICH IS NATURAL OR ARTIFICIAL RUBBER, AND AN ELECTRICALLY CONDUCTING INTERMEDIATE MEMBER SEPARATING SAID SHEETS, THE EDGE OF SAID INTERMEDIATE MEMBER BEING EXPOSED THROUGHOUT ITS PERIMETER, SAID PLATES AND SAID AT LEAST THREE INTERPOSED MEMBERS BEING BONDED TO EACH OTHER TO FORM A COHERENT UNIT.
References Cited (Backward Citations)
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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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |