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:
Jun. 30, 2015
Filed:
Jun. 25, 2013
Hitachi-ge Nuclear Energy Ltd., Hitachi-shi, Ibaraki, JP;
Hisamitu Hatou, Hitachi, JP;
Noboru Saito, Kasumigaura, JP;
Ren Morinaka, Takahagi, JP;
Fujio Yoshikubo, Mito, JP;
Masashi Fukaya, Kashiwa, JP;
Yuji Matsui, Hitachinaka, JP;
Ryuji Kimura, Hitachi, JP;
Hitachi-GE Nuclear Energy, Ltd., Hitachi-shi, JP;
Abstract
A chamber having a water jet generation apparatus and a mesh installed inside is pushed against a surface of a peening object. A rotary vane of the water jet generation apparatus, disposed in a region in the chamber between the mesh and the chamber, is rotated to generate a water jet flowing toward the peening object in one region in the chamber, the one region is a region closer to the peening object than the mesh. A plurality of shotsput in the regionA moves toward the peening object along with the water jet and collides with the surface of the peening object. After the collision, the shots move toward the mesh along with the water jet. Compression residual stress is given to the surface of the peening object with which the shots have collided. Thus, spreading of contaminants peeled off from a peening object can be prevented.