The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2003
Filed:
Apr. 24, 2002
Katsuhiko Hirano, Hitachi, JP;
Kunio Enomoto, Hitachi, JP;
Eisaku Hayashi, Hitachi, JP;
Sadato Shimizu, Hitachinaka, JP;
Ren Morinaka, Takahagi, JP;
Tetsuya Ishikawa, Hitachi, JP;
Shigeru Tanaka, Ibaraki, JP;
Noboru Chiba, Ibaraki, JP;
Other;
Abstract
A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.