Patent US3847037A successfully refreshed from Google Patents.
US3847037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct joining tool
Assignee: Individual
•
Filing: 1973-06-25
•
Granted: 1974-11-12
•
Expires: 1993-06-25
Abstract
Abstract A duct joining tool in the form of a pair of pliers having convexly shaped duct engaging flanges mounted to the outer extremities of the work engaging portion thereof.
Inventors
- 👤 E Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:45
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/02; B25B27/00; B25B27/14; B25B27/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A duct joining tool comprising a pair of arms disposed in crossed relation, a pivot means extending through said arms at their point of crossing and connecting said arms together for relative pivotal movement, said arms including a pair of cooperating handle portions at one end and a pair of opposing work engaging portions at the other end, each said work engaging portions including a convexly shaped inwardly facing duct engaging flange connected to an end portion of each said work engaging portions.
Claim 2
Dependent Claim
83 words
A duct joining tool comprising a pair of arms disposed in crossed relation, a pivot means extending through said arms at their point of crossing and connecting said arms together for relative pivotal movement, said arms including a pair of cooperating handle portions at one end and a pair of opposing work engaging portions at the other end, each said work engaging portions including a convexly shaped inwardly facing duct engaging flange connected to an end portion of each said work engaging portions.
Claim 3
Dependent Claim
15 words
The structure of claim 1 wherein one of said work engaging portions is substantially C-shaped.
Claim 4
Dependent Claim
16 words
The structure of claim 2 wherein the other of said work engaging portions is substantially straight.
Claim 5
Dependent Claim
40 words
The structure of claim 1 wherein each said work engaGing portions include a pair of spaced apart convexly shaped inwardly facing duct engaging flanges, each said pair of flanges connected to an end portion of each said work engaging portions.
Claim 6
Dependent Claim
10 words
The structure of claim 1 wherein said flanges are round.
Claim 7
Dependent Claim
10 words
The structure of claim 1 wherein said flanges are tapered.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |