US3287997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slug retaining pipe tap
Assignee: MB Skinner Co
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Filing: 1964-02-25
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Granted: 1966-11-29
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Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Mcmurray
- 👤 Eugene C Knoblock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123; Y10T29/00; Y10T29/49; Y10T29/49403; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/558; Y10T408/5583; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A MEMBER ADAPTED TO BE SCREW-THREADED IN A T FITTING CONNECTED TO A STEEL WALLED FLUID-CONTAINING MEMBER TO BE TAPPED AND TO A DISCHARGE CONDUIT, COMPRISING AN ELONGATED STEEL MEMBER HAVING A SCREW-THREADED END PORTION, AND A PUNCHING END PORTION OF SMALLER CROSS-SECTIONAL DIMENSION THAN SAID THREADED END PORTION, SAID PUNCHING END PORTION HAVING A BORE OPEN AT ITS END, COAXIAL WITH SAID PUNCH AND OF AN AXIAL DIMENSION GREATER THAN THE THICKNESS OF THE WALL TO BE TAPPED, THE TIP OF SAID PUNCHING END PORTION BEING DEFINED BY AT LEAST TWO SURFACE PORTIONS CONVERGENT TOWARD THE AXIS OF SAID BORE ON ALL RADII AND OF CURVED SHAPE ON ALL PLANES TRANSVERSE OF THE AXIS OF SAID PUNCH, EACH OF SAID CONVERGING SURFACE PORTIONS HAVING A LONGITUDINAL AXIS OFFSET FROM THE AXIS OF SAID BORE, AND EACH CONVERGING SURFACE INTERSECTING A SIMILAR SURFACE PORTION TO FORM LONGITUDINALLY FORWARDLY CONVERGING RIDGES EXTENDING FROM THE OUTER SURFACE TO NEAR THE BORE OF SAID PUNCHING END PORTION.
Claim 2
Dependent Claim
164 words
A MEMBER ADAPTED TO BE SCREW-THREADED IN A T FITTING CONNECTED TO A STEEL WALLED FLUID-CONTAINING MEMBER TO BE TAPPED AND TO A DISCHARGE CONDUIT, COMPRISING AN ELONGATED STEEL MEMBER HAVING A SCREW-THREADED END PORTION, AND A PUNCHING END PORTION OF SMALLER CROSS-SECTIONAL DIMENSION THAN SAID THREADED END PORTION, SAID PUNCHING END PORTION HAVING A BORE OPEN AT ITS END, COAXIAL WITH SAID PUNCH AND OF AN AXIAL DIMENSION GREATER THAN THE THICKNESS OF THE WALL TO BE TAPPED, THE TIP OF SAID PUNCHING END PORTION BEING DEFINED BY AT LEAST TWO SURFACE PORTIONS CONVERGENT TOWARD THE AXIS OF SAID BORE ON ALL RADII AND OF CURVED SHAPE ON ALL PLANES TRANSVERSE OF THE AXIS OF SAID PUNCH, EACH OF SAID CONVERGING SURFACE PORTIONS HAVING A LONGITUDINAL AXIS OFFSET FROM THE AXIS OF SAID BORE, AND EACH CONVERGING SURFACE INTERSECTING A SIMILAR SURFACE PORTION TO FORM LONGITUDINALLY FORWARDLY CONVERGING RIDGES EXTENDING FROM THE OUTER SURFACE TO NEAR THE BORE OF SAID PUNCHING END PORTION.
References Cited (Backward Citations)
US2990731A
Cited
US3142205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |