Patent US3397291A successfully refreshed from Google Patents.
US3397291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining rib and pin for third rail contact shoe
Assignee: Amsted Industries Inc
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Filing: 1966-12-15
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Granted: 1968-08-13
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Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Maloney Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:05
CPC Classifications
B; B60; B60L; B60L5/00; B60L5/38; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN AN ELECTRICAL CONTACT SHOE ASSEMBLY FOR A VEHICLE, THE COMBINATION OF A FULCRUM HAVING MEANS FOR ATTACHMENT TO THE VEHICLE, A PAD HAVING A BOTTOM SURFACE FOR ENGAGEMENT WITH AN ASSOCIATED SOURCE OF ELECTRICAL CURRENT, A TONGUE ON SAID PAD RECEIVED WITHIN A SLOT OF SAID FULCRUM, SPRING MEANS BEARING AGAINST UPWARDLY AND DOWNWARDLY FACING SURFACES OF THE TONGUE AND FULCRUM, RESPECTIVELY, AT ONE SIDE OF THE SLOT FOR URGING SAID PAD AND FULCRUM INTO INTERENGAGEMENT AT THE OPPOSITE SIDE OF THE SLOT, A KEYWAY ON THE PAD ABOVE THE SLOT, A KEY EXTENDING THROUGH THE KEYWAY AND SEATED AT ITS ENDS AGAINST UPWARDLY FACING SURFACES OF THE FULCRUM, SAID KEY HAVING LINE CONTACT WITH THE PAD IN SAID KEYWAY AND
Claim 2
Dependent Claim
122 words
IN AN ELECTRICAL CONTACT SHOE ASSEMBLY FOR A VEHICLE, THE COMBINATION OF A FULCRUM HAVING MEANS FOR ATTACHMENT TO THE VEHICLE, A PAD HAVING A BOTTOM SURFACE FOR ENGAGEMENT WITH AN ASSOCIATED SOURCE OF ELECTRICAL CURRENT, A TONGUE ON SAID PAD RECEIVED WITHIN A SLOT OF SAID FULCRUM, SPRING MEANS BEARING AGAINST UPWARDLY AND DOWNWARDLY FACING SURFACES OF THE TONGUE AND FULCRUM, RESPECTIVELY, AT ONE SIDE OF THE SLOT FOR URGING SAID PAD AND FULCRUM INTO INTERENGAGEMENT AT THE OPPOSITE SIDE OF THE SLOT, A KEYWAY ON THE PAD ABOVE THE SLOT, A KEY EXTENDING THROUGH THE KEYWAY AND SEATED AT ITS ENDS AGAINST UPWARDLY FACING SURFACES OF THE FULCRUM, SAID KEY HAVING LINE CONTACT WITH THE PAD IN SAID KEYWAY AND
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |