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United States Patent 5,852,277
Gustafson Dec. 22, 1998

Laser cutting tool for cutting elongated hollow workpieces

Abstract

A method of cutting a pattern in a hollow, tubular workpiece to form a stent or the like involves the use of a novel workpiece fixture. The workpiece fixture is rigidly carried on a laser cutting tool to support a long piece of stock tubing in a cantilever manner beneath the laser beam of the cutting tool. The fixture is spaced from the laser beam by a distance which is in a range of approximately the same as to slightly greater than the length of any axial repeat in the pattern. The laser beam cuts the pattern in the stock tubing piece as the stock tubing is advanced past the laser beam. The cutting takes place in a zone that is close to the end of the fixture and the cantilever support provided thereby.


Inventors: Gustafson; Gary E. (Darwin, MN).
Assignee: Spectralytics, Inc. (Litchfield, MN).
Appl. No.: 736,533
Filed: Oct. 24, 1996
Intl. Cl. : B23K 26/08
Current U.S. Cl.: 219/121.67; 219/121.82
Field of Search: 219/121.6, 121.67, 121.68, 121.7, 121.72, 121.82, 121.73, 121.75; 269/287, 288

References Cited | [Referenced By]

U.S. Patent Documents
1,109,952Sept., 1914Armstrong 269/287
2,339,986Jan., 1944Engert 269/287
3,627,339Dec., 1971Burweger 269/287 X
3,882,741May, 1975Cowdin 82/157
4,151,393Apr., 1979Fenneman et al. 219/121.6
4,317,021Feb., 1982Walch et al. 219/121.67
5,026,965Jun., 1991Ohe et al. 219/121.7
5,345,057Sept., 1994Muller
5,386,097Jan., 1995Ruckl 219/121.68

Foreign Patent Documents
4124546Jan., 1993DE 219/121.8
59-54485Mar., 1984JP 219/121.67
59-193785Nov., 1984JP 219/121.82
60-223692Nov., 1985JP 219/121.73
8-187595Jul., 1996JP 219/121.82
Primary Examiner: Mills; Gregory L.
Attorney, Agent or Firm: Miller; James W.
5 Claims, 4 Drawing Figures

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