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| United States Patent |
6,426,479
|
|
Bischof
|
July 30, 2002
|
Nozzle system for laser beam cutting
Abstract
A nozzle arrangement for laser beam cutting, having a nozzle body
surrounding a focused laser beam and with a passage opening for the laser
beam, and having a nozzle sleeve which surrounds the nozzle body and forms
with the nozzle body an annular gap which on the one hand has an inlet for
a gas, and on the other hand has an annular opening assigned to the
passage openings, wherein there is provided in the annular gap a
nozzle-like constriction whose width is increased upstream and downstream
of the constriction.
| Inventors:
|
Bischof; Dietmar (Bermatingen, DE)
|
| Assignee:
|
LT Ultra-Precision-Technology GmbH (Aftholderberg, DE)
|
| Appl. No.:
|
445387 |
| Filed:
|
January 3, 2000 |
| PCT Filed:
|
June 10, 1998
|
| PCT NO:
|
PCT/EP98/03511
|
| 371 Date:
|
January 3, 2000
|
| 102(e) Date:
|
January 3, 2000
|
| PCT PUB.NO.:
|
WO98/56534 |
| PCT PUB. Date:
|
December 17, 1998 |
Foreign Application Priority Data
| Jun 13, 1997[DE] | 197 25 256 |
| Current U.S. Class: |
219/121.67; 219/121.84; 219/121.5; 219/121.83 |
| Intern'l Class: |
B23K 026/14 |
| Field of Search: |
219/121.67,121.84,121.5,121.83,121.6,121.63,121.72
|
References Cited
U.S. Patent Documents
| 4090572 | May., 1978 | Welch.
| |
| 5609781 | Mar., 1997 | Kaga et al. | 219/121.
|
| 5786561 | Jul., 1998 | Zefferer et al. | 219/121.
|
| Foreign Patent Documents |
| 3630127 | Mar., 1987 | DE.
| |
| 4234788 | Apr., 1994 | DE.
| |
| 4437795 | Apr., 1995 | DE.
| |
| 4402000 | Jul., 1995 | DE.
| |
| 0294324 | Dec., 1988 | EP.
| |
| 9500282 | Jan., 1995 | WO.
| |
Other References
Patent Abstracts of Japan, vol. 011, No. 158 (M-591), May 22, 1987--JP 61
289992 A (Inoue Japaz Res Inc.) Dec. 19, 1986.
|
Primary Examiner: Elve; M. Alexandra
Attorney, Agent or Firm: Bachman & LaPointe, P.C.
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