US3754698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot gas fusion apparatus
Assignee: Boeing North American Inc
•
Filing: 1971-12-20
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Granted: 1973-08-28
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Expires: 1991-12-20
Abstract
Abstract A hydrazine compound in a carrier gas wherein the hydrazine compound is transformed into its gaseous state and the gaseous hydrazine is used by processing apparatus to bond metallic materials with a soldering material, to remove film compound formation from metallic surfaces, and to minimize porous formation in soldering materials which may be attached to metallic surfaces. The hydrazine compound is transported by the gaseous carrier and heated to a temperature that vaporizes the hydrazine and is used for reacting the gaseous hydrazine with the film formation on the metals or with the soldering material thereon to achieve excellent bonding characteristics and low conductivity joints.
Inventors
- 👤 J Bochinski
- 👤 J Linkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3615; B23K1/00; B23K1/012; B23K1/015; B23K35/38; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6606; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
17 words
The apparatus as stated in claim 1: said first and third means being made of stainless steel.
Claim 2
Dependent Claim
24 words
The apparatus as stated in claim 1, wherein: said fourth means includes an insulating member for insulating said fourth means from said third means.
Claim 3
Dependent Claim
27 words
The apparatus as stated in claim 1, including: valve means integral with the first and second means for controlling flow of the hydrazine compound and carrier gas.
Claim 4
Dependent Claim
24 words
The apparatus recited in claim 1, wherein: said fourth means comprises a heating chamber which surrounds at least a portion of said third means.
Claim 5
Dependent Claim
23 words
The apparatus recited in claim 1, wherein: said hydrazine compound has the formulation R1R2NNHR3 where R1, R2 and R3 are each hydrogen aliphatic.
Claim 6
Dependent Claim
30 words
The apparatus recited in claim 3, wherein: said fourth means includes an electrically powered heater, said insulating means positioned to electrically insulate said heater from the remainder of said apparatus.
Claim 7
Dependent Claim
14 words
The apparatus recited in claim 1, wherein: said carrier gas is an inert gas.
Claim 8
Dependent Claim
34 words
The apparatus recited in claim 4, wherein: said valve means includes a first valve device connected between said first and third means, and a second valve device connected between said second and third means.
Claim 9
Independent Claim
157 words
An apparatus used in a process for bonding metals with soldering material, which process utilizes a fluid compound and a carrier gas, comprising in combination: first means for retaining a fluid compound used in said bonding process, said first means comprised of a material that is non-reactive with said fluid compound; second means for retaining a carrier gas for conveying said fluid compound; third means connected to said first and second means for transporting a mixture of said fluid compound and said carrier gas, said third means having an opening for passing the mixture of said fluid compound and said carrier gas therethrough; and fourth means attached at said opening to said third means for heating the mixture, thereby transforming said fluid compound into its gaseous state and for directing the mixture in gaseous form at surfaces of said metals and soldering material thereby efficiently wetting the metals with the soldering material and consequently bonding the metals.
Claim 10
Independent Claim
104 words
An apparatus used in process of bonding metals with soldering material which process utilizes a hydrazine coMpound, comprising in combination: first means for retaining the hydrazine compound, said first means being of a material that is non-reactive with the hydrazine compound; second means connected to said first means and having an opening therein for passing the hydrazine compound therethrough; and third means connected at said opening at said second means for heating the hydrazine compound and directing the heated compound at the surfaces of the metals and soldering material thereby efficiently wetting the metals with the soldering material and thereby bonding together said metals.
Claim 11
Dependent Claim
75 words
In combination, first means for supplying a liquid hydrazine compound; second means for supplying a carrier gas; third means for mixing said carrier gas and said liquid hydrazine compound to form a mixture having a sufficiently low concentration of hydrazine such that said mixture is nonflammable; and fourth means for heating said mixture to transform said hydrazine to the gaseous state in said carrier gas and to direct the heated mixture to a work station.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |