Methods and apparatus for detection of large leaks in sealed articles

申请公布号：US2006156795(A1)

申请号：US20050524244

申请日期：2005.02.10

申请公布日期：2006.07.20

申请人：

PERKINS CHARLES;PALENSTIJN PIETER N

发明人：PERKINS CHARLES;PALENSTIJN PIETER N.

分类号：G01M3/04;G01M3/20;G01M3/22

主分类号：G01M3/04

摘要：Methods and apparatus are provided for detection of large leaks in scaled articles. Apparatus for leak detection includes a first sealable chamber configured to receive a test piece containing a trace gas, a second sealable chamber, a first valve coupled between the first and second chambers, a leak detector having a test port, a trace gas permeable member coupled between the second chamber and the test port of the leak detector, a vacuum pump having an inlet, and a second valve coupled between the second chamber and the inlet of the vacuum pump. The permeable member may be quartz, which is permeable to helium when heated. The leak detector may be an ion pump or a helium mass spectrometer leak detector.

SATELLITE COMMUNICATION SYSTEM

GRIPPING DEVICE

Solar collector using the greenhouse effect.

Process for the production of hexahydro-5-hydroxy-4-hydroxymethyl-2H-cyclopenta[b]furan-2-one