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. 26, 2012
Filed:
Oct. 23, 2009
Applicant:
Toru Sasaki, Tokyo, JP;
Inventor:
Toru Sasaki, Tokyo, JP;
Assignee:
Fukuda Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01M 3/26 (2006.01); G01M 3/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A leak testing apparatusincludes a heat sensitive memberhaving a bodymade of a material having high thermal conductivity. The bodyis abutted against an outer surface of a workpieceto close an opening of an inner spaceof the workpieceA pressure chamberis formed inside the bodyas arranged along the outer surface and as arranged over an area wider than the opening. Pressurized gas is introduced to the pressure chamberData on pressure change in the inner spaceof the workpieceis compensated based on inner pressure information regarding the pressure chamberand leak judgment is made.