| United States Patent | 5,827,588 |
| Snyder, et. al. | Oct. 27, 1998 |
Abstract
A workpiece has a surface formed by a circular bore extending in the workpiece body along a bore axis. The bore surface includes a heat-affected zone pattern thereon, produced with a laser light beam. The heat-affected zone pattern can be a variety of patterns including a single helix, overlapping helixes a single annular ring and a plurality of annular rings. The heat-affected zones can have a variety of widths, as measured in relation to the longitudinal bore axis.
| Inventors: | Snyder; Craig L. (Glen Gardner, NJ); Gavigan; William J. (Nazareth, PA); Tufano; Frank J. (Wilmington, NC); Shandersky; James T. (Milan, PA). |
| Assignee: | Ingersoll-Rand Company (Woodcliff Lake, NJ). |
| Appl. No.: | 751,492 |
| Filed: | Nov. 18, 1996 |
| Intl. Cl. : | B29D 22/00 |
| Current U.S. Cl.: | 428/36.9; 219/121.67; 411/436; 428/36.91 |
| Field of Search: | 428/36.9, 36.91; 219/121.67; 411/436 |
| H853 | Dec., 1990 | Stewart | 138/118.1 |
| 4,017,708 | Apr., 1977 | Engel et al. | 219/121.LM |
| 4,019,331 | Apr., 1977 | Rom et al. | 61/53.54 |
| 5,048,032 | Sept., 1991 | Ekstrand et al. | 372/34 |
| 5,256,459 | Oct., 1993 | Carlson | 428/36.3 |
Primary Examiner: Nuzzolillo; M
Assistant Examiner: Ver Steeg; Steven H.
Attorney, Agent or Firm: Selko; John J.