US4377735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser working treatment process capable of controlling the form of heated portion of a steel material
Assignee: Nippon Steel Corp
•
Filing: 1981-05-28
•
Granted: 1983-03-22
•
Expires: 2001-05-28
Abstract
Abstract A steel material is treated by laser beams, in such a manner that the laser beams and a gas jet are concurrently projected to a working point of the steel material to produce a plasma around the working point and another gas jet is ejected to the working point at an oblique angle to the projecting direction of the laser beams so as to press the plasma against the steel material surface, whereby the form of the plasma can be controlled by changing the oblique angle of the another gas jet ejection.
Inventors
- 👤 Katsuhiro Minamida
- 👤 Shigehiro Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/14; B23K26/1462; B23K26/1464; B23K26/1476; B23K10/00; B23K26/1435; B23K26/1438; B23K26/147; B23K2103/00; B23K2103/02; B23K2103/04; B23K2103/05
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A laser working treatment process for a steel material, in which laser beams are irradiated to a working point on a steel material while a jet of gas is ejected coaxially with the laser beams to said working point to cause plasma to be generated at the working point, said plasma being pressed against the steel material by ejecting another jet of gas to said working point at an oblique angle to the irradiating direction of said laser beams and the form of said plasma being controlled by changing the ejecting angle of said other jet of gas.
Claim 2
Dependent Claim
98 words
A laser working treatment process for a steel material, in which laser beams are irradiated to a working point on a steel material while a jet of gas is ejected coaxially with the laser beams to said working point to cause plasma to be generated at the working point, said plasma being pressed against the steel material by ejecting another jet of gas to said working point at an oblique angle to the irradiating direction of said laser beams and the form of said plasma being controlled by changing the ejecting angle of said other jet of gas.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1, wherein said plasma-generating gas is helium.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1, wherein said other gas is helium.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1, wherein said steel material is welded.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 1, wherein two steel materials having different thicknesses from each other are welded to each other.
Claim 7
Dependent Claim
13 words
A process as claimed in claim 1, wherein said steel material is quenched.
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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |