US3086478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trolley track
Assignee: Columbus McKinnon Corp
•
Filing: 1959-05-25
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Granted: 1963-04-23
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Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Schreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/22; E01B25/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A TROLLEY TRACKWAY DEVICE COMPRISING A GENERALLY BOX-SECTIONED TRACK MEMBER INCLUDING OPPOSED VERTICAL SIDEWALLS LEADING INTO INTURNED GENERALLY HORIZONTAL BOTTOM RAIL FLANGE PORTIONS THE EDGES OF WHICH ARE RELATIVELY SPACED TO PROVIDE A TROLLEY SUSPENSION SLOTWAY THEREBETWEEN, SAID RAIL FLANGE PORTIONS BEING FORMED SO AS TO INCLINE UPWARDLY TOWARD SAID SLOTWAY, TROLLEY MEMBERS WITHIN THE TRACK MEMBER HAVING WHEELS THEREON, SAID WHEELS HAVING CYLINDRICAL TREAD PORTIONS ENGAGING ON THE RAIL FLANGE PORTIONS ON A POINT CONTACT, WHEREBY CONSTANT LOADING ON THE TROLLEY MEMBERS WILL CAUSE THE RAIL FLANGE PORTIONS TO DEFLECT DOWNWARDLY THUS SHIFTING THE POINT CONTACT.
Claim 2
Dependent Claim
97 words
A TROLLEY TRACKWAY DEVICE COMPRISING A GENERALLY BOX-SECTIONED TRACK MEMBER INCLUDING OPPOSED VERTICAL SIDEWALLS LEADING INTO INTURNED GENERALLY HORIZONTAL BOTTOM RAIL FLANGE PORTIONS THE EDGES OF WHICH ARE RELATIVELY SPACED TO PROVIDE A TROLLEY SUSPENSION SLOTWAY THEREBETWEEN, SAID RAIL FLANGE PORTIONS BEING FORMED SO AS TO INCLINE UPWARDLY TOWARD SAID SLOTWAY, TROLLEY MEMBERS WITHIN THE TRACK MEMBER HAVING WHEELS THEREON, SAID WHEELS HAVING CYLINDRICAL TREAD PORTIONS ENGAGING ON THE RAIL FLANGE PORTIONS ON A POINT CONTACT, WHEREBY CONSTANT LOADING ON THE TROLLEY MEMBERS WILL CAUSE THE RAIL FLANGE PORTIONS TO DEFLECT DOWNWARDLY THUS SHIFTING THE POINT CONTACT.
References Cited (Backward Citations)
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Cited
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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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |