The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1996
Filed:
May. 04, 1994
Applicant:
Inventors:
Assignee:
Solinst Canada Limited, Georgetown, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166165 ; 7386465 ; 1663324 ; 175 20 ;
Abstract
For extracting samples of groundwater from a borehole. A down-hole fixture has a check-valve positioned at the foot of the borehole. A sampler is lowered down into the borehole. Pushing down on the sampler causes a stem on the sampler to unseat the check-valve, communicating groundwater with the sampler. A plastic tube running from the sampler to the surface transmits the push from the surface, required to operate the down-hole valve.