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:
Oct. 31, 1989
Filed:
Dec. 29, 1987
Applicant:
Inventor:
Manfred Jansch, Garbsen, DE;
Assignee:
Weatherford Oil Tool GmbH, Hanover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 491 ; 138 93 ; 73 46 ;
Abstract
This invention relates to an apparatus for testing the gas-tightness of joints between hollow bodies, for example, pipes. With the apparatus, a test space with two concentric chambers of variable sizes is formed. The outer one is filled with a gaseous test medium and the inner one with an incompressible pressurized medium. It is thereby possible to reduce substantially the quantity of the gaseous test medium. The safety of the entire apparatus is improved extraordinarily.