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:
Mar. 07, 1989
Filed:
Sep. 30, 1986
Akio Furuse, Hachioji, JP;
Kabushiki Kaisha Kosumo Keiki, Tokyo, JP;
Abstract
Leak test equipment which includes a master side pneumatic system and a work side pneumatic system executes a leakage test sequence basically including pressurizing, balancing and detecting steps under control of a microcomputer. A nonvolatile read/write memory has prestored therein an equivalent inner volume of the work side pneumatic system corresponding to each type of work being tested for leakage. In a leak test, a leakage .DELTA.V.sub.L =V.sub.E .multidot..DELTA.P/1.03 is calculated on the basis of a pressure difference .DELTA.P between the work side pneumatic system and the master side pneumatic system, detected in the detecting step, and a corresponding equivalent inner volume V.sub.E read out of the nonvolatile read/write memory. The calculated leakage is compared with an allowable value of leakage, thereby deciding whether the work is acceptable or not.