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:
Nov. 10, 1998
Filed:
Dec. 19, 1996
Applicant:
Inventors:
Makoto Yamaguti, Kariya, JP;
Masahiro Matsuyama, Chiryu, JP;
Assignee:
Denso Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 40 ; 73269 ;
Abstract
According to the present invention, a leakage measurement apparatus includes a volume metering device having a diaphragm which is displaced in accordance with a change in volume of the measurement medium leaked from an object and transmitted to the diaphragm. The volume of the leakage is calculated based on the change of the displaced amount of the diaphragm. In this way, the amount of leakage can be measured directly from the change in volume of the measurement medium. Further, the volume of the leakage can be measured without being affected by a change in pressure, and the accuracy of measurement can be improved.