Measuring and testing – Instrument proving or calibrating – Fluid pressure
Reexamination Certificate
2006-09-26
2006-09-26
Raevis, Robert (Department: 2856)
Measuring and testing
Instrument proving or calibrating
Fluid pressure
Reexamination Certificate
active
07111491
ABSTRACT:
A dual range dynamic pressure differential generator for use at low pressures using a differential over a variable valve for a first stage pressure differential and the differential over a flow accelerator for a second stage pressure differential. The differential over the variable valve is useful for higher pressure differentials while the differential created over the flow accelerator is useful for a lower range pressure differential, although the two ranges may overlap.
REFERENCES:
patent: 3508431 (1970-04-01), Richardson et al.
patent: 4102175 (1978-07-01), Foster
patent: 4380166 (1983-04-01), Crombie
patent: 4406161 (1983-09-01), Locke et al.
patent: 4655074 (1987-04-01), Robertson et al.
patent: 4658829 (1987-04-01), Wallace
patent: 4776201 (1988-10-01), Jones
patent: 4842806 (1989-06-01), Ohtomi
patent: 4920802 (1990-05-01), McMullin et al.
patent: 5016466 (1991-05-01), Ness et al.
patent: 5129264 (1992-07-01), Lorenc
patent: 5269659 (1993-12-01), Hampton et al.
patent: 5295790 (1994-03-01), Bossart et al.
patent: 5328851 (1994-07-01), Zaromb
patent: 5837881 (1998-11-01), Martin
patent: 5861561 (1999-01-01), Van Cleve et al.
patent: 5970801 (1999-10-01), Ciobanu et al.
patent: 6069326 (2000-05-01), Henson et al.
patent: 6352001 (2002-03-01), Wickert et al.
patent: 6865957 (2005-03-01), Hughes et al.
patent: 2003/0046974 (2003-03-01), Kosh
patent: 2004/0083820 (2004-05-01), Ciobanu et al.
patent: 2 582 400 (1986-11-01), None
patent: 04309830 (1992-11-01), None
International Search Report dated Dec. 12, 2002 for PCT/US02/26498.
J-C. Legras, “Etalonnage de Capteurs DP Sous Pression de O a 400 Bars,” vol. 49, No. 9, Jun. 1, 1984, pp. 45-47, 49, 51, 52.
R. Devanathan, “An Automatic Aid for the Callibration of a Differential Pressure Transmitter,” Proceedings from IECON '86, 1986 International Conference on Industrial Electronics, Control, and Instrumentation, vol. 1, Sep. 29, 1986, pp. 158-163.
PCT International Search Report, PCT/US2005/007142, Jul. 5, 2005, pp. 1-3.
Golafshani Mehdi
Kosh William Stephen
Ashcroft Inc.
Fish & Richardson P.C.
Raevis Robert
LandOfFree
Portable differential pressure generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable differential pressure generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable differential pressure generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3544139