US3775587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for evacuation of impurities forming in welding processes
Assignee: Individual
•
Filing: 1972-08-08
•
Granted: 1973-11-27
•
Expires: 1992-08-08
Abstract
Abstract A device for evacuation of impurities forming in welding processes with supply of protective gas comprises a tube rotatably mounted on the welding tool and surrounding said tool clearance, said tube being provided at its front end portion with an intake opening and having a laterally projecting coupling piece which serves as a handle and is connected to a suction hose.
Inventors
- 👤 E Lindkvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A device for evacuation of smoke and other airborne impurities formed during the use of welding apparatus having means for supplying a protective gas surrounding a central welding wire guide enclosed by a nozzle for ejecting the protective gas around the weld, said device comprising an evacuating tube rotatably mounted on and surrounding the welding tool and spaced therefrom, said tube being provided at its front end portion with an intake opening, a coupling element mounted on and projecting laterally from said tube, a suction hose connected to said coupling element, said coupling element including a sleeve rotatably mountEd on said tube, the circumferential wall of said tube and said sleeve being provided with corresponding openings therein whereby the passage formed by said combined openings leading to the suction hose may be regulated by relative rotation of one of said evacuation tube and said sleeve with respect to the other.
Claim 2
Independent Claim
150 words
A device for evacuation of smoke and other airborne impurities formed during the use of welding apparatus having means for supplying a protective gas surrounding a central welding wire guide enclosed by a nozzle for ejecting the protective gas around the weld, said device comprising an evacuating tube rotatably mounted on and surrounding the welding tool and spaced therefrom, said tube being provided at its front end portion with an intake opening, a coupling element mounted on and projecting laterally from said tube, a suction hose connected to said coupling element, said coupling element including a sleeve rotatably mountEd on said tube, the circumferential wall of said tube and said sleeve being provided with corresponding openings therein whereby the passage formed by said combined openings leading to the suction hose may be regulated by relative rotation of one of said evacuation tube and said sleeve with respect to the other.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1 and further comprising means for locking the sleeve in a predetermined angular position with respect to said tube.
Claim 4
Dependent Claim
34 words
A device as claimed in claim 1 and further comprising a conical screen ring mounted on the nozzle for ejecting the protective gas at a position adjacent the intake opening of said evacuating tube.
Claim 5
Dependent Claim
53 words
A device as claimed in claim 1 wherein the intake opening of said evacuation tube comprises two concentric, mutually rotatable, tube-like elements each having oblique, wedge-shaped recesses in the outer circumference thereof, whereby, when aligned, said concentric elements permit welding in corners and when offset, prevent excess air from entering said evacuation tube.
Claim 6
Dependent Claim
31 words
A device as claimed in claim 1 and further comprising telescopic means mounted on said coupling element for selectively withdrawing airborne impurities laterally of the intake opening of said evacuating tube.
Claim 7
Dependent Claim
32 words
A device as claimed in claim 5 wherein said telescopic means is provided with an intake opening adjacent its outer end, said means telescoping longitudinally of the axis of the welding tool.
Claim 8
Dependent Claim
18 words
A device as claimed in claim 1, wherein said coupling element is rotatably mounted on said evacuation tube.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |