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:
Nov. 28, 1989
Filed:
Aug. 26, 1988
Akio Morinaga, Fujisawa, JP;
Isaburo Yagi, Amagasaki, JP;
Hideo Maruyama, Osaka, JP;
Akifumi Yamamoto, Takatsuki, JP;
Tokyo Gas Co., Ltd., Tokyo, JP;
Ashimori Industry Co., Ltd., Osaka, JP;
Abstract
Method and apparatus for lining pipe lines, especially those buried in the ground and having a large diameter, according to the so-called evagination-lining technique by using a compressed gas as a pressurized fluid, which is so improved as to secure complete sealing of a pressure container for inserting the lining material into a pipe line by using a specific sealing device using a liquid in place of a mechanical sealing device while preventing a binder applied onto the inner surface of the lining material from being squeezed backwards when the lining material is introduced into the pressure container.