Patent US4626653A successfully refreshed from Google Patents.
US4626653A
Expired / Lapsed
US
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Method of and installation for spot-welding by laser beam
Assignee: Sciaky SAS
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Filing: 1984-06-18
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Granted: 1986-12-02
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Expires: 2004-06-18
Abstract
Abstract Method of and installation for spot-welding by laser beam, the method characterized in that the focusing means (3) undergoes displacement so that the point of focus (4) of the beam on the workpieces (4, 5) describes at least a path which is closed upon itself and of which the surface area of fusion obtained corresponds to the desired spot weld. The invention is applied to the welding of superposed workpieces.
Inventors
- 👤 Mario Sciaky
- 👤 Roland Cazes
- 👤 Georges Sayegh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/08; B23K26/082; B23K26/20; B23K26/21; B23K26/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A method of spot welding by laser beam comprising: emanating a laser beam from a generator; focusing the laser beam on a work piece; displacing the focused beam in a desired path on the work piece; modulating the power of the emanating laser beam at a first power level prior to displacement, at a second power level less than the first power level during a first portion of the displacement and at a third power level less than the second power level during a second portion of the displacement.
Claim 2
Independent Claim
89 words
A method of spot welding by laser beam comprising: emanating a laser beam from a generator; focusing the laser beam on a work piece; displacing the focused beam in a desired path on the work piece; modulating the power of the emanating laser beam at a first power level prior to displacement, at a second power level less than the first power level during a first portion of the displacement and at a third power level less than the second power level during a second portion of the displacement.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1 wherein the focused beam is displaced in a circular pattern and wherein the second power level of the modulation is commenced for substantially 360° of the circular pattern displacement.
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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |