US4644127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of carrying out a treatment on metal pieces with the addition of an added material and with the use of a power laser
Assignee: Fiat Auto SpA
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Filing: 1985-08-20
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Granted: 1987-02-17
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Expires: 2005-08-20
Abstract
Abstract The method allows a treatment (cutting, welding, alloying or surface hardening, etc.) to be carried out on a metal piece with the addition of an added material and with the use of a power laser. The metal piece is heated locally and the added material is brought into a plastic or liquid state by means of laser radiation so as to fuse it with the piece. The added material used is a powder.
Inventors
- 👤 Aldo V. La Rocca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/18; B23K26/14; B23K26/144
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
A method for applying a powdered material to a metal piece by means of a power laser and gas stream assembly comprising: irradiating a first area on a surface of a metal piece with a laser beam from said power laser; conveying said powdered material through a portion of said laser beam by means of said gas stream to a second area on said surface smaller than and completely within said first area to bring said powdered material to a plastic or liquid state prior to contacting said surface; and moving said power laser and gas stream assembly and said metal piece relative to each other whereby the surface of the metal piece is preheated by said laser beam prior to the application of the powdered material in the plastic or liquid state to the surface and is postheated by said laser means after the application of the powdered material in the plastic or liquid state to the surface of said metal piece.
Claim 2
Independent Claim
163 words
A method for applying a powdered material to a metal piece by means of a power laser and gas stream assembly comprising: irradiating a first area on a surface of a metal piece with a laser beam from said power laser; conveying said powdered material through a portion of said laser beam by means of said gas stream to a second area on said surface smaller than and completely within said first area to bring said powdered material to a plastic or liquid state prior to contacting said surface; and moving said power laser and gas stream assembly and said metal piece relative to each other whereby the surface of the metal piece is preheated by said laser beam prior to the application of the powdered material in the plastic or liquid state to the surface and is postheated by said laser means after the application of the powdered material in the plastic or liquid state to the surface of said metal piece.
Claim 3
Dependent Claim
51 words
A method as set forth in claim 1 further comprising placing an additional metal piece adjacent said first mentioned metal piece with a gap therebetween and directing said laser beam and said gas stream containing powdered material onto the surfaces of said pieces adjacent said gap to weld said pieces together.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |