Patent US5354964A successfully refreshed from Google Patents.
US5354964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser torch
Assignee: Mazda Motor Corp
•
Filing: 1993-08-31
•
Granted: 1994-10-11
•
Expires: 2013-08-31
Abstract
Abstract A laser working device for working a workpiece moving in one direction has a converging lens for focusing and directing approximately vertically a laser beam onto the workpiece, a gas injector for injecting and directing an inert gas forwardly with respect to the one direction and toward where the laser beam is focused, and an air injector for forming a pressurized air curtain between the converging lens and workpiece so that the air curtain crosses the vertical laser beam.
Inventors
- 👤 Yasuo Kyoren
- 👤 Hiroshi Fukuoka
- 👤 Takafumi Fukai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:24
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/14; B23K26/142; B23K26/12; B23K26/123; B23K26/1435; B23K26/1438; B23K26/1462; B23K26/1464; B23K26/147; B23K26/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
A laser working device for working a workpiece moving below and relative thereto comprising: a housing defining an opening in the bottom thereof; laser beam means located in said housing for directing laser radiation out of the opening in said housing; a converging lens mounted in said housing for directing said laser beam approximately vertically through said opening with respect to and focusing same onto an area in the plane of a workpiece moving below and relative to said housing; gas injection means mounted for directing inert gas forwardly in the direction of relative movement of the workpiece and covering said area onto where said laser beam is focused; and air injection means mounted for forming and directing a laminar of air to cross said vertical laser beam at an acute angle and to intersect the plane of the workpiece forwardly of the said area onto where the laser beam is focused, thereby forming a downwardly directed air curtain between said converging lens and the workpiece.
Claim 2
Dependent Claim
166 words
A laser working device for working a workpiece moving below and relative thereto comprising: a housing defining an opening in the bottom thereof; laser beam means located in said housing for directing laser radiation out of the opening in said housing; a converging lens mounted in said housing for directing said laser beam approximately vertically through said opening with respect to and focusing same onto an area in the plane of a workpiece moving below and relative to said housing; gas injection means mounted for directing inert gas forwardly in the direction of relative movement of the workpiece and covering said area onto where said laser beam is focused; and air injection means mounted for forming and directing a laminar of air to cross said vertical laser beam at an acute angle and to intersect the plane of the workpiece forwardly of the said area onto where the laser beam is focused, thereby forming a downwardly directed air curtain between said converging lens and the workpiece.
Claim 3
Dependent Claim
25 words
A laser working device as defined in claim 1, wherein said air injection means comprises a downwardly inclined air nozzle having a horizontally extending slot.
Claim 4
Dependent Claim
22 words
A laser working device as defined in claim 2, wherein said air nozzle has a plurality of said slots arranged vertically spaced.
Claim 5
Dependent Claim
20 words
A laser working device as defined in claim 1, further comprising a cover member for confining said laminar of air.
Claim 6
Dependent Claim
18 words
A laser working device as defined in claim 4, wherein said cover member is configured in a U-shape.
Claim 7
Dependent Claim
32 words
A laser working device as defined in claim 1, further comprising a protective glass plate mounted in said housing on the side of said converging lens remote from said laser beam means.
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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |