Patent Number: 6,332,350

Title: Leak tester

Abstract: A leak tester is used to perform a leak test on a work such as a wheel bydetecting trace gas being leaked from the work. Herein, the work isinstalled in a chamber and is tightly held between seals. A leak testerseal is constructed using a work seal base, on which a number of channelsare formed like circular rings, which are sequentially arranged with equalintervals. For example, an interval of distance between centers ofadjoining channels is set at 1.27 cm to cope with different kinds of tirewheels, diameters of which are determined in accordance with theprescribed standard. Incidentally, each channel has a rectangular shape insection. In addition, a number of sealing members, made of elasticmaterial, are formed like circular rings, which are fitted into thechannels respectively. At installation of the work into the chamber of theleak tester, a rim of the wheel is pressed against the sealing memberburied in the channel of the work seal base. Because the sealing member issecurely supported by the channel, the sealing member is hard to bedeformed, so that abrasion can be reduced. Incidentally, the leak testeruses a rubber plug, having a special design, with which a valve hole ofthe wheel is closed. Furthermore, the leak tester uses an instrumentexclusively used for insertion and extraction of the rubber plug.

Inventors: Inoue; Akifumi (Hamamatsu, JP), Katoh; Takeshi (Hamamatsu, JP), Kubota; Kazushige (Hamamatsu, JP), Takahashi; Hidemi (Hamamatsu, JP)


International Classification: G01M 3/32 (20060101); G01M 3/20 (20060101); G01M 003/04 (); G01M 003/26 ()

Expiration Date: 12/25/2014