US3277683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punch for pipe tapping t fitting
Assignee: MB Skinner Co
•
Filing: 1964-02-25
•
Granted: 1966-10-11
•
Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Knoblock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:51
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/292; F; F16; F16L; F16L41/00; F16L41/04; F16L41/045; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123; Y10T408/00; Y10T408/89; Y10T408/907; Y10T408/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PUNCH ADAPTED TO BE SCREW-THREADED IN A T FITTING CONNECTED TO A STEEL WALLED FLUID CONTAINING MEMBER TO BE TAPPED TO CONVEY FLUID TO A CONDUIT CONNECTED TO SAID FITTING, COMPRISING AN ELONGATED STEEL MEMBER HAVING A SCREW-THREADED END PORTION, A SHANK PORTION OF SMALLER DIAMETER THAN SAID THREADED END PORTION, AND A PUNCHING END PORTION OF SMALLER CROSS-SECTIONAL DIMENSION THAN SAID SHANK PORTION, SAID PUNCHING END PORTION HAVING A TAPERED TIP OF CURVED NON-CIRCULAR CROSS-SECTIONAL SHAPED ON ALL TRANSVERSE PLANES THEREOF AND CHARACTERIZED BY CONVERGING RIDGES EXTENDING ALONG SAID TIP AT OPPOSITE SIDES THEREOF AND CONSTITUTING WORK-ENGAGING HOLEFORMING PARTS OF SAID TIP AS SAID PUNCH IS ROTATED TO ADVANCE IT AXIALLY TO AND THROUGH THE WALL TO BE TAPPED.
Claim 2
Dependent Claim
121 words
A PUNCH ADAPTED TO BE SCREW-THREADED IN A T FITTING CONNECTED TO A STEEL WALLED FLUID CONTAINING MEMBER TO BE TAPPED TO CONVEY FLUID TO A CONDUIT CONNECTED TO SAID FITTING, COMPRISING AN ELONGATED STEEL MEMBER HAVING A SCREW-THREADED END PORTION, A SHANK PORTION OF SMALLER DIAMETER THAN SAID THREADED END PORTION, AND A PUNCHING END PORTION OF SMALLER CROSS-SECTIONAL DIMENSION THAN SAID SHANK PORTION, SAID PUNCHING END PORTION HAVING A TAPERED TIP OF CURVED NON-CIRCULAR CROSS-SECTIONAL SHAPED ON ALL TRANSVERSE PLANES THEREOF AND CHARACTERIZED BY CONVERGING RIDGES EXTENDING ALONG SAID TIP AT OPPOSITE SIDES THEREOF AND CONSTITUTING WORK-ENGAGING HOLEFORMING PARTS OF SAID TIP AS SAID PUNCH IS ROTATED TO ADVANCE IT AXIALLY TO AND THROUGH THE WALL TO BE TAPPED.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |