Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Reexamination Certificate
2006-06-27
2006-06-27
Noori, Max (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
C073S700000
Reexamination Certificate
active
07066032
ABSTRACT:
A pressure converter insusceptible to the error of hydraulic pressure introducing position or the interference of installation depth of water and producing a signal corresponding to the effective soil pressure accurately while realizing cost reduction. Since filters are provided in an air gap defined by two rigid plates receiving the soil pressure, a hydraulic pressure is applied but sand pressure is not applied. A load gauge insensitive to the hydraulic pressure detects only the effective soil pressure. Since a signal cable can be passed through the air gap, a plurality of pressure converters can be coupled efficiently and since the signal cable can be inserted internally, a pressure distributed in the depth direction can also be measured accurately.
REFERENCES:
patent: 4175445 (1979-11-01), Templeton, III
patent: 4211301 (1980-07-01), Mifsud
patent: 6017597 (2000-01-01), Minakami et al.
patent: 5-187939 (1993-07-01), None
patent: 2000-65656 (2000-03-01), None
Maeno Yoshihiko
Yabe Koichi
Educational Foundation Nihon University
Jordan and Hamburg LLP
Noori Max
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