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| United States Patent | 5,811,753 |
| Weick, et. al. | Sept. 22, 1998 |
Laser machine tool with gas filled beam delivery conduit
Abstract
A laser machine tool includes a laser beam generator (3) and a machining head (5), and the laser beam (2) passes between the laser beam generator (3) and the machining head (5) in a beam passage (25) that is at least partially closed. The beam passage (4) is filled with air with a limited CO(2) content. In this way, the laser beam (2) in the beam passage is protected at low cost from the influence of gases that reduce its power, especially when the path of the beam is very long.
| Inventors: | Weick; Jurgen-Michael
(Asperg, DE);
Mohler; Thomas
(Eberdingen, DE).
|
| Assignee: | Trumpf GmbH & Co.
(Ditzingen, DE).
|
| Appl. No.: | 667,988 |
| Filed: | Jun. 19, 1996 |
Foreign Application Priority Data
| Jun. 19, 1995 [DE] | 295 09 648.9 |
| Intl. Cl. : | B23K 26/00 |
| Current U.S. Cl.: | 219/121.78; 219/121.67; 219/121.84 |
| Field of Search: | 219/121.6, 121.67, 121.78, 121.84 |
References Cited | [Referenced By]
U.S. Patent Documents
| 3,885,927 | May, 1975 | Sherman et al. | 95/139 |
| 4,550,240 | Oct., 1985 | Toida et al. | |
| 4,661,680 | Apr., 1987 | Swensrud | 219/121.78 |
| 4,895,144 | Jan., 1990 | Cook et al. | |
| 5,559,584 | Sept., 1996 | Miyaji et al. | 355/73 |
Foreign Patent Documents
| 4006148C2 | Sept., 1990 | DE | |
| 58-121692 | Jul., 1983 | JP | |
| 59-54484 | Mar., 1984 | JP | |
| 63-299884 | Dec., 1988 | JP | 219/121.84 |
| 2-235012 | Sept., 1990 | JP | |
| 3-151185 | Jun., 1991 | JP | |
| 5-84590 | Apr., 1993 | JP | |
| 680990A5 | Sept., 1990 | CH | |
| 95/33594 | Dec., 1995 | WO | |
Primary Examiner: Mills; Gregory L.
Attorney, Agent or Firm: Pepe & Hazard LLP
6 Claims, 2 Drawing Figures
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