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. 08, 1980
Filed:
Oct. 31, 1977
Applicant:
Inventor:
Gerald J VanderLans, Lodi, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
156121 ; 156122 ; 156159 ; 156191 ; 277228 ;
Abstract
A high-pressure joint tester includes a pair (or two pairs) of plugs, each plug having an annular rigid channel containing an inflatable elastomeric annular tube. The spaced, parallel plugs are joined together by a rigid cylindrical wall extending between inner sides of the channels. The tubes are inflated at preselected pressures to seal against interior pipe walls on opposite sides of a locus where two pipe ends meet at a joint, and fluid is introduced under pressure through the cylindrical wall to the outer surface thereof. Rollers support the device for movement through the pipeline to be tested.