Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Earth stresses
Patent
1986-02-18
1988-03-29
Tokar, Michael J.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Earth stresses
G01N 300
Patent
active
047335688
ABSTRACT:
A highly portable pressure intensifier for use with a borehole dilatometer head having an expandable body defining an internal cavity to measure deformation properties of in-situ rock masses. The housing of the intensifier comprises two axially aligned interconnecting cylinders, one of which is of substantially larger diameter. The larger cylinder has a reciprocating piston mounted therein, the piston having a plunger portion which extends axially into the smaller cylinder. The smaller cylinder is connected to the cavity of the dilatometer head by means of high pressure tubing. The larger cylinder is filled ahead of the piston with a first working liquid. The second cylinder, the dilatometer head cavity and the interconnecting tubing are filled with a second working liquid. Increasing the pressure of the first working liquid displaces the plunger portion into the smaller cylinder, substantially increasing the pressure of the second working liquid, which latter increase causes the dilatometer head to expand so as to deform the rock of the borehole in which it is placed. A pressure transducer and a linear variable differential transformer are provided for deriving signals representing changes in pressure and volume respectively.
REFERENCES:
patent: 2381929 (1945-08-01), Schlumberger
patent: 2539292 (1951-01-01), Anderson
patent: 2777425 (1957-01-01), Adams et al.
patent: 2959226 (1960-11-01), Blood
patent: 3610035 (1971-10-01), Handy
patent: 3858441 (1975-01-01), Comeau
patent: 3927652 (1975-12-01), O'Neill
patent: 4196619 (1980-04-01), Collins
patent: 4237723 (1980-12-01), Kent
patent: 4343595 (1982-08-01), Wells et al.
patent: 4557147 (1985-12-01), Rohde et al.
patent: 4594899 (1986-06-01), Henke et al.
Hughes Robin W.
Koopmans Robert
Raevis Robert R.
Tokar Michael J.
LandOfFree
Borehole dilatometer intensifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Borehole dilatometer intensifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Borehole dilatometer intensifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1082989