US3790742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle
Assignee: Messer Griesheim GmbH
•
Filing: 1972-08-16
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Granted: 1974-02-05
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Expires: 1992-08-16
Abstract
Abstract Disclosed is a nozzle for a welding or plasma torch. The nozzle has an inner and an outer housing, each made of a different material. Thus, the inner housing, through which passes the plasma arc, is made of a highly heat resistant meterial. The outer housing is made of a highly heat conductive material for quickly conducting heat away from the inner housing.
Inventors
- 👤 R Auer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:24
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3457
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A nozzle of the type used in plasma cutting or welding torches, such torches having an electrode supported within a holder, said nozzle comprising: a first outer housing comprising heat conductive material and a second inner housing comprising heat resistant material being compounded into an integral piece with said first housing; said second housing having an aperture therein for directing a plasma or welding arc; said first housing conducting heat away from said second housing.
Claim 2
Dependent Claim
75 words
A nozzle of the type used in plasma cutting or welding torches, such torches having an electrode supported within a holder, said nozzle comprising: a first outer housing comprising heat conductive material and a second inner housing comprising heat resistant material being compounded into an integral piece with said first housing; said second housing having an aperture therein for directing a plasma or welding arc; said first housing conducting heat away from said second housing.
Claim 3
Dependent Claim
16 words
A nozzle as recited in claim 1 wherein said inner housing comprises sintered tungsten and copper.
Claim 4
Dependent Claim
15 words
A nozzle as recited in claim 2 wherein said outer housing is made of copper.
Claim 5
Dependent Claim
78 words
A nozzle as recited in claim 3 wherein said holder is hollow and has therewithin a cooling chamber, said chamber is defined by interior and exterior walls of said holder, said intErior wall surrounding a substantially cylindrical aperture, the electrode being supported within said cylindrical aperture, insulating means insulating the electrode from said holder; means for fixing said nozzle to one end of said holder for establishing an arc from the electrode through said nozzle to a workpiece.
Claim 6
Independent Claim
39 words
The method of making a nozzle for a plasma cutting or welding torch comprising: providing a mold; placing a core of heat resistant material in said mold; and placing a conductive material in a liquid state into said mold.
Claim 7
Independent Claim
39 words
The method of making a nozzle for a plasma cutting or welding torch comprising: providing a mold; placing a core of heat resistant material in said mold; and placing a conductive material in a liquid state into said mold.
Claim 8
Dependent Claim
23 words
The method as recited in claim 5 further comprising: permitting said conductive material to migrate into and bond with said core while solidifying.
Claim 9
Dependent Claim
47 words
The method as recited in claim 6 further comprising: the step of placing a core of heat resistant material in said mold includes selecting sintered porous tungsten for said core; the step of placing a conductive material in said mold includes pouring liquid copper into said mold.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |