| US 7,491,950 B2 | ||
| Method for retrofitting concrete structures | ||
| Kenneth Joe Breyer, Colton, Calif. (US); Bradley Steven Johnson, Cherry Valley, Calif. (US); George Edward Johnston, Loma Linda, Calif. (US); Martin Johnson, San Clemente, Calif. (US); Elwood Smietana, Lake Forest, Calif. (US); Ronald Hamburger, Belmont, Calif. (US); Michael J. Rojansky, Alamo, Calif. (US); and John Shipp, Santa Ana, Calif. (US) | ||
| Assigned to Loma Linda University Medical Center, Loma Linda, Calif. (US) | ||
| Filed on Jan. 12, 2007, as Appl. No. 11/653,127. | ||
| Application 11/653127 is a continuation of application No. 10/307247, filed on Nov. 27, 2002, granted, now 7,180,080. | ||
| Application 10/307247 is a continuation of application No. 10/100223, filed on Mar. 15, 2002, abandoned. | ||
| Claims priority of provisional application 60/358132, filed on Feb. 20, 2002. | ||
| Prior Publication US 2008/0048130 A1, Feb. 28, 2008 | ||
| Int. Cl. G21G 5/00 (2006.01) | ||
| U.S. Cl. 250—492.1 [52/167.1] | 16 Claims |
| 1. A method of seismic retrofitting a concrete structure comprising:
scanning a laser beam across a surface of the concrete structure, the laser beam penetrating a depth into the concrete structure;
controlling the depth of penetration of the laser beam into the concrete structure;
removing material from the concrete structure;
forming at least one key in the surface of the concrete structure;
placing additional concrete around at least a portion of the concrete structure such that the additional concrete fills the
at least one key; and
using the at least one key to attach the additional concrete to the concrete structure.
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