Method and apparatus for recovering helium after testing for lea

Details Method and apparatus for recovering helium after testing for lea Method and apparatus for recovering helium after testing for lea

1999-01-13

2000-09-19

Williams, Hezron

Measuring and testing

With fluid pressure

Leakage

73 492, B01D 1508, F15B 102, G01M 320, F25J 300

Patent

active

061195073

ABSTRACT:
A helium supply unit (1) supplies helium from a high pressure storage (21) to fill a test chamber (6) which encloses a sample holder (5) to be examined for leaks by measuring device (2) including a mass spectrometer (3) and a control unit (4). The test gas is recovered after the testing by a pressure difference between a low pressure storage (18) and the test chamber (6). The test chamber is evacuated prior to receipt of the test gas by a vacuum pump (27) and after testing by a vacuum pump (34) for more complete helium recovery. The recovered test gas is then transmitted back to the high pressure storage (21) through a compressor (19), which raises the pressure of the recovered gas to a predetermined pressure, from the low pressure storage (18). The control unit (4) also controls a pure test gas supply (37) and a release valve (44). The concentration of the recovered test gas is measured and, if the concentration is too low, the control unit (4) releases the recovered test gas through valve (44) and admits fresh test gas from the supply (37) into the helium supply unit (1) at a point between the low pressure storage (18) and the compressor (19). In this manner, expensive test gases, such as helium, are recovered and reused.

REFERENCES:
patent: 3675468 (1972-07-01), Caccamesi et al.
patent: 3740962 (1973-06-01), Fan
patent: 3815376 (1974-06-01), Lofredo et al.
patent: 4153023 (1979-05-01), Asano et al.
patent: 4675030 (1987-06-01), Czarnecki et al.
patent: 4688627 (1987-08-01), Jean-Luc et al.
patent: 4701187 (1987-10-01), Choe et al.
patent: 4717407 (1988-01-01), Choe et al.
patent: 4984450 (1991-01-01), Burger
patent: 5172583 (1992-12-01), Tallon
patent: 5224350 (1993-07-01), Mehra
patent: 5248473 (1993-09-01), Sommer et al.
patent: 5375456 (1994-12-01), Burns
patent: 5390533 (1995-02-01), Schulte et al.
patent: 5417105 (1995-05-01), Martinez et al.
patent: 5625141 (1997-04-01), Mahoney et al.
patent: 5728940 (1998-03-01), Kim et al.
patent: 5786529 (1998-07-01), Voss et al.
Engelhart, W.: "Automatische Dichtheitsprufanlagen fur die Kalte-Industrie", Technisches Messen, vol. 54, Mar. 1987, pp. 100-103.

Affiliated with

Also associated with

Rating

Method and apparatus for recovering helium after testing for lea does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for recovering helium after testing for lea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for recovering helium after testing for lea will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1060766