US3606402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking means for adjacent pipe sections
Assignee: SMITH FIBERGLASS PRODUCTS Inc A DE CORP
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Filing: 1969-07-02
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Granted: 1971-09-20
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Expires: 1989-07-02
Abstract
Abstract A KEY ADAPTED TO BE INSERTED INTO A CHANNEL DEFINED BY OPPOSED GROOVES IN TELESCOPED PIPE SECTIONS PROVIDES MEANS FOR RELEASABLY LOCKING THE PIPE SECTIONS TO EACH OTHER. THE KEY IS, THE CROSS SECTION, AN HEXAGONAL POLYGON HAVING TWO SURFACES THAT ARE RADIALLY SPACED APART AND PARALLEL TO THE LONGITUDINAL AXIS OF THE PIPE. THE DIMEN- SION BETWEEN THE RADIALLY SPACED SURFACES IS LESS THAN THAT OF THE AXIALLY SPACED VERTICES OF THE KEY. THE VERTICES OF THE KEY ARE DEFINED BY SIDE WALLS THAT ARE POSITIONED AT AN ANGLE NOT GREATER THAN 45* WITH RESPECT TO THE LONGITUDINAL AXIS OF THE PIPE.
Inventors
- 👤 Jonas Medney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/12; F16L37/14; F16L37/142; F16L37/148
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |