US4076038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping tee cutter having relieved sidewall
Assignee: Phillips Petroleum Co
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Filing: 1976-01-05
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Granted: 1978-02-28
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Expires: 1996-01-05
Abstract
Abstract A tapping tee cutter for cutting plastic pipe is provided which comprises an externally threaded plug body attached to a thin-walled, hollow band cutter having a cutting edge with the portion of the band wall nearest the cutting edge having an external diameter at least as great as the cutting edge and forming a shoulder with an adjacent portion of the band cutter wall having a relieved external diameter sufficiently less than the diameter of the cutting edge so that frictional contact between the relieved diameter and a pipe wall being tapped is minimized.
Inventors
- 👤 Ralph A. Wynne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:24
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/26; F16L47/34; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123; Y10T408/00; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A cutter for a tapping tee for cutting plastic pipe comprising: a. a band cutter terminating in a cutting edge, said cutter having a portion of the cutter wall near the cutting edge of an external diameter at least equal to the diameter of the cutting edge and forming a shoulder with an adjacent portion of the cutter wall, said adjacent portion of the cutter wall having a relieved external diameter sufficiently less than the diameter of the cutting edge to minimize the frictional contact between the relief diameter and the cut wall of a pipe being tapped.
Claim 2
Dependent Claim
98 words
A cutter for a tapping tee for cutting plastic pipe comprising: a. a band cutter terminating in a cutting edge, said cutter having a portion of the cutter wall near the cutting edge of an external diameter at least equal to the diameter of the cutting edge and forming a shoulder with an adjacent portion of the cutter wall, said adjacent portion of the cutter wall having a relieved external diameter sufficiently less than the diameter of the cutting edge to minimize the frictional contact between the relief diameter and the cut wall of a pipe being tapped.
Claim 3
Dependent Claim
44 words
A cutter of claim 1 wherein said cutter is a thin-walled, hollow, cylindrical band cutter that extends from its end opposite the cutting edge from a cylindrical, co-axial, externally threaded plug body member attached for rotative movement in a through-bore of a tapping tee.
Claim 4
Dependent Claim
33 words
A cutter of claim 2 wherein said threaded plug body member is indented with a geometric depression suitable for the insertion of a tool for turning the tapping plug within a tapping tee.
Claim 5
Dependent Claim
38 words
A cutter of claim 2 wherein said threaded plug body member has a vent hole passing therethrough connecting the space within the hollow internal diameter of the cutter with the opposite external surface of the threaded plug body.
Claim 6
Dependent Claim
20 words
A cutter of claim 2 wherein said cutting edge is the same diameter as the external diameter of the cutter.
Claim 7
Dependent Claim
21 words
A cutter of claim 2 wherein the diameter of the cutting edge is less than the external diameter of the cutter.
Claim 8
Dependent Claim
31 words
A cutter of claim 6 wherein the cutting edge diameter is less than one-half the difference between the external major diameter of the cutter and the internal diameter of the cutter.
Claim 9
Dependent Claim
21 words
In combination a service tee for tapping plastic pipe with an internally threaded through-bore fitted with a cutter of claim 1.
Claim 10
Dependent Claim
21 words
In combination a service tee for tapping plastic pipe with an internally threaded through-bore fitted with a cutter of claim 2.
Claim 11
Dependent Claim
21 words
In combination a service tee for tapping plastic pipe with an internally threaded through-bore fitted with a cutter of claim 6.
Claim 12
Dependent Claim
21 words
In combination a service tee for tapping plastic pipe with an internally threaded through-bore fitted with a cutter of claim 7.
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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |