Patent US3683657A successfully refreshed from Google Patents.
US3683657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe fitting tool
Assignee: Individual
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Filing: 1970-05-18
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Granted: 1972-08-15
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Expires: 1990-05-18
Abstract
Abstract A pipe fitting tool comprises a former having a head and a shank. The head has a recess allowing insertion through a hole in the wall of a pipe although the width of the head is greater than the greatest width of the hole. The former may then be rotated and withdrawn from the hole to form an annular flange around the hole for insertion of a branch pipe.
Inventors
- 👤 Fred Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:00
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/298; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49442
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
In a pipe fitting tool including a former for insertion through a hole in a pipe, and for being rotatably withdrawn to expand the hole to form an externally projecting annular flange at the periphery thereof, the improvement wherein said former comprises a forming head, a shank connected to said head and having a maximum cross-sectional dimension at said connection to said head which is less than that of said hole, said head being elongated in a direction normal to a rotative axis of said shank and having a length measured from one end to the other crosssection said elongated direction which is greater than the maximum cross-section dimension of said hole, and having a width disposed normal to both said shank axis and said length, said head width being less than said maximum dimension of said hole, and wherein said head has an elongated recess therein disposed in a surface thereof adjacent said connection to said shank for receiving therein an edge portion of the pipe at said hole, thereby enabling the head to be inserted through the hole.
Claim 2
Dependent Claim
180 words
In a pipe fitting tool including a former for insertion through a hole in a pipe, and for being rotatably withdrawn to expand the hole to form an externally projecting annular flange at the periphery thereof, the improvement wherein said former comprises a forming head, a shank connected to said head and having a maximum cross-sectional dimension at said connection to said head which is less than that of said hole, said head being elongated in a direction normal to a rotative axis of said shank and having a length measured from one end to the other crosssection said elongated direction which is greater than the maximum cross-section dimension of said hole, and having a width disposed normal to both said shank axis and said length, said head width being less than said maximum dimension of said hole, and wherein said head has an elongated recess therein disposed in a surface thereof adjacent said connection to said shank for receiving therein an edge portion of the pipe at said hole, thereby enabling the head to be inserted through the hole.
Claim 3
Dependent Claim
69 words
A pipe fitting tool according to claim 1, wherein said elongated recess is aligned in its lengthwise direction substantially normal to said elongated dimension of said head and has a depth which extends angularly with respect to the shank axis from said head surface adjacent the shank toward one of said ends of said head on the opposite side on said shank from said head surface adjacent said shank.
Claim 4
Dependent Claim
41 words
A pipe fitting tool according to claim 2, wherein the depth of the recess is such that the distance from the floor of the recess to said one end of the head is less than said maximum dimension of the hole.
Claim 5
Dependent Claim
55 words
A pipe fitting tool according to claim 3, wherein said connection of said shank to said head is centered intermediate said ends of said head, and said head is tapered toward said respective longitudinal ends of the head and away from said shank on surfaces of said head which are longitudinally opposed of said shank.
Claim 6
Dependent Claim
17 words
A pipe fitting tool according to claim 4, wherein said tapered surfaces are arcuate in cross section.
Claim 7
Dependent Claim
20 words
A pipe fitting tool according to claim 5, wherein said longitudinally spaced ends of the head have substantially parallel surfaces.
Claim 8
Dependent Claim
18 words
A pipe fitting tool according to claim 6, wherein the transverse extremities of the head are substantially flat.
References Cited (Backward Citations)
US2213574A
Cited
US3468147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |