Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2007-09-18
2007-09-18
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S579000, C073S599000, C073S628000
Reexamination Certificate
active
10474885
ABSTRACT:
A method of testing a material sample for defects, comprising the steps of applying a test signal to the material sample, receiving a return signal from the material sample and analysing the return signal to determine whether the material sample is defective. In one aspect of the present invention the steps of receiving a return signal and analysing it include the step of selecting a frequency range to reduce the effect of potentially interfering signals. In another aspect of the present invention a reference signal obtained from a non-defective sample is subtracted from the return signal to give a difference result and the difference result is indicative of whether the material sample is defective. Apparatus for carrying out the above-defined methods are also provided.
REFERENCES:
patent: 4482889 (1984-11-01), Tsuda et al.
patent: 4736130 (1988-04-01), Puskas
patent: 4743789 (1988-05-01), Puskas
patent: 4792755 (1988-12-01), Huschelrath et al.
patent: 4869109 (1989-09-01), Miglianico et al.
patent: 5623100 (1997-04-01), Arima et al.
patent: 5671154 (1997-09-01), Iizuka et al.
patent: 6301967 (2001-10-01), Donskoy et al.
patent: 6421811 (2002-07-01), Goruganthu et al.
patent: 6581014 (2003-06-01), Sills et al.
patent: 6684701 (2004-02-01), Dubois et al.
patent: 6747268 (2004-06-01), Ume
patent: 6799126 (2004-09-01), Ratcliffe et al.
patent: 7004016 (2006-02-01), Puskas
patent: 7107825 (2006-09-01), Degertekin et al.
patent: 0294255 (1988-05-01), None
patent: 0574963 (1993-12-01), None
Derwent Abstract Accession No. 2000-003256/01, Class S03 JP 11-281629 A (Nippon Steel Corp) Oct. 15, 1999 See abstract.
Derwent Abstract Accession No. 96-071824/08, Class S03 JP 07294500- A (Hitachi Constr Machinery Co Ltd) Nov. 10, 1995 See abstract.
Derwent Abstract Accession No. 86-284110/43, Class S03 SU 1221594 A (Ind Prog Automn) Mar. 30, 1986 See abstract.
Dickinson Laurence
Thwaites, legal representative Vivonne
Commonwealth Scientific and Industrial Research Organisation
Ladas & Parry LLP
Saint-Surin Jacques M
Williams Hezron
LandOfFree
Method and apparatus for carrying out non-destructive... 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 carrying out non-destructive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for carrying out non-destructive... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3759433