US3354987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladders
Assignee: Werner Co
•
Filing: 1965-09-16
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Granted: 1967-11-28
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Richard L Werner
- 👤 Lawrence A Kocina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:49
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/082; E06C7/085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994; Y10T29/49943
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A JOINT FOR A LADDER RAIL HAVING A RUNG OPENING IN SAID RAIL, COMPRISING A RUNG, A TUBULAR FERRULE, SAID FERRULE HAVING A TUBULAR BODY PORTION INCLUDING A SUBSTANTIALLY PERIPHERALLY DISPOSED PREFORMED ANNULUS OF PREDETERMINED RELATIVELY GREATER RADIAL EXTENT THAN THE REMAINDER OF SAID BODY PORTION AND EXTENDING RADIALLY OUTWARDLY THEREOF, A SHOULDER PORTION, AN END PORTION OF LESSER DIAMETER THAN SAID SHOULDER PORTION PROJECTING OUTWARDLY OF SAID RAIL OPENING, THE SAID PREFORMED ANNULUS ABUTTING SUBSTANTIAL PORTIONS OF ONE SIDE OF THE SAID RAIL SURROUNDING THE RUNG OPENING, THE SAID SHOULDER PORTION OF THE FERRULE CLOSELY FITTED WITHIN THE SAID OPENING AND REINFORCING PORTIONS OF THE RAIL SURROUNDING THE SAME, THE END PORTION FORMED INTO A SECOND ANNULUS OF RELATIVELY LESSER CIRCUMFERENCE THAN SAID PREFORMED ANNULUS COMPRESSIVELY ENGAGING PORTIONS PERIPHERALLY SURROUNDING THE RUNG OPENING ON AN OPPOSITE SIDE OF SAID RAIL, THE SAID PREFORMED ANNULUS AND SHOULDER AFFORDING SUPPORT BOTH AXIALLY AND RADIALLY.
Claim 2
Dependent Claim
153 words
A JOINT FOR A LADDER RAIL HAVING A RUNG OPENING IN SAID RAIL, COMPRISING A RUNG, A TUBULAR FERRULE, SAID FERRULE HAVING A TUBULAR BODY PORTION INCLUDING A SUBSTANTIALLY PERIPHERALLY DISPOSED PREFORMED ANNULUS OF PREDETERMINED RELATIVELY GREATER RADIAL EXTENT THAN THE REMAINDER OF SAID BODY PORTION AND EXTENDING RADIALLY OUTWARDLY THEREOF, A SHOULDER PORTION, AN END PORTION OF LESSER DIAMETER THAN SAID SHOULDER PORTION PROJECTING OUTWARDLY OF SAID RAIL OPENING, THE SAID PREFORMED ANNULUS ABUTTING SUBSTANTIAL PORTIONS OF ONE SIDE OF THE SAID RAIL SURROUNDING THE RUNG OPENING, THE SAID SHOULDER PORTION OF THE FERRULE CLOSELY FITTED WITHIN THE SAID OPENING AND REINFORCING PORTIONS OF THE RAIL SURROUNDING THE SAME, THE END PORTION FORMED INTO A SECOND ANNULUS OF RELATIVELY LESSER CIRCUMFERENCE THAN SAID PREFORMED ANNULUS COMPRESSIVELY ENGAGING PORTIONS PERIPHERALLY SURROUNDING THE RUNG OPENING ON AN OPPOSITE SIDE OF SAID RAIL, THE SAID PREFORMED ANNULUS AND SHOULDER AFFORDING SUPPORT BOTH AXIALLY AND RADIALLY.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |