UNDERWATER WORK DEVICE AND UNDERWATER STRAIN GAUGE DEVICE

WIPO Patent Application WO/2011/078362

A1

Disclosed are an underwater work device and an underwater strain gauge device such that the inner pressure of a container is easily changed according to the change in the outer pressure. In the strain gauge device (100), a piston (54) attached to a tubular opening (53A) provided at a housing (53) slides in response to an outer pressure. Thus, the volume of an adjustment oil housing area (52) and a sensitive area (15) fluctuates so as to keep a balance with the outer pressure, thereby changing the inner pressure. The strain gauge device (100) can easily adjust the inner pressure as only the sliding of the piston (54) causes the inner pressure of the adjustment oil housing area (52) and the sensitive area (15) to change according to the change in the outer pressure. Further, as the above-mentioned pressure balance mechanism (51) is attained with a simple structure, the adjustment between the outer pressure and the inner pressure can be easily performed even under a high temperature and high-pressure environment.

ITO HISAO (JP)
ARAKI EIICHIRO (JP)
FURUYA KAZUO (JP)

PCT/JP2010/073431

June 30, 2011

December 24, 2010

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JAPAN AGENCY MARINE EARTH SCI (JP)
SEISMOTEC CORP (JP)
ITO HISAO (JP)
ARAKI EIICHIRO (JP)
FURUYA KAZUO (JP)

G01B13/24

JPS60205206A	1985-10-16
JPS61174613U	1986-10-30
JPH11512828A	1999-11-02
JP2008525814A	2008-07-17
JPH11511566A	1999-10-05
JPS57165710A	1982-10-12
US2957341A	1960-10-25
JP2003042864A	2003-02-13
JPH02189434A	1990-07-25
US3187560A	1965-06-08
JPH11512828A	1999-11-02

HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)

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