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. 31, 2015
Filed:
Jan. 22, 2010
Akifumi Tanaka, Hadano, JP;
Akifumi Tanaka, Hadano, JP;
Nittan Valve Co., Ltd., Hadano-shi, JP;
Abstract
The method of the present invention comprises the steps of inserting, the plunger having in the side wall thereof a lower open end and an oil recycling hole in the side wall thereof and provided with a seal member, supplying pressurized air to the plunger through a port formed in the top end of the plunger, testing the internal air tightness of the sealed lash adjuster with the lower end of the plunger and with the oil recycling hole closed when the plunger is inserted in the body, opening the oil recycling hole and further inserting the plunger in the body if the seal member is verified to have satisfactory sealability; and testing the internal air tightness of the lash adjuster to test the sealability of the seal member with the seal member and with the oil recycling hole positioned not to reach the seal member.