Measuring and testing – With fluid pressure – Leakage
Patent
1991-11-20
1994-12-06
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 407, 73 492, G01M 304
Patent
active
053699823
ABSTRACT:
An apparatus for detecting leaks in a test object having chamber walls, having a first and a second side subject to differential pressure produced by production of a partial vacuum on the first side, the detection being carried out by use of a test gas present on the second side of said chamber walls. The apparatus has a vacuum pump for providing the partial vacuum, a detector for detecting the test gas, a connecting means for connecting the apparatus to the test object, and a plurality of primary control valves for controlling the leak detection process. The improvement comprises at least one of the primary control valves being actuated by a driving cylinder and a driving piston, where the piston is actuated via pneumatic actuation which is provided by the vacuum pump while the test object is connected to the apparatus.
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Russian Patent No. 1451-574-A Abstract, Test Rig of Attached Hydraulic Drive Equipment, Derwent Publications Ltd (29 Nov. 89).
Russian Patent No. 1322-775-A Abstract, Articles Air-Tightness Test Device Derwent Publications, Ltd. (12 Jun. 91).
Dombroske George
Leybold Aktiengesellschaft
Williams Hezron E.
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