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:
Feb. 15, 1994
Filed:
Dec. 30, 1992
Applicant:
Inventor:
Daniel A Ortega, Englewood, CO (US);
Assignee:
Public Service Company of Colorado, Denver, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16L / ;
U.S. Cl.
CPC ...
137 15 ; 1510416 ; 151042 ; 137245 ; 1372455 ; 137318 ; 138 97 ;
Abstract
A method and apparatus for sealing off flow in a pipeline for the purpose of repairing the line includes a combination of a restraining rod and inflation bag which can be installed on either or both sides of the intended site of repair; and a flexible sleeve is provided for use in association with the entry ports and any associated valve members for insertion of the restraining rod and bag to prevent the escape of gas from the line during the insertion procedures. Once the line is repaired, the restraining rod and inflation bag can be removed and the entry ports completely sealed off.