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:
Jun. 22, 1999
Filed:
Mar. 25, 1998
Applicant:
Inventor:
Randall A Nichols, Manchester, NH (US);
Assignee:
NEUCO, Inc., Everett, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05C / ;
U.S. Cl.
CPC ...
118712 ; 118254 ; 118306 ; 118408 ; 118670 ; 427236 ;
Abstract
Joints or other discontinuities in live gas pipelines are sealed by spraying the joint or discontinuity with a coating material by means of an explosion-proof coating device, capable of traversing long lengths of pipe. The coating device is inserted into the pipe and uses a halogen lit explosion-proof camera for locating joints or other discontinuities in the pipe. The preferred coating material is a high build epoxy-type elastomeric polyurethane, which quickly cures in the presence of pressurized flowing gas. Several joints or discontinuities, spanning several hundred feet of pipe, may be coated using a single excavation.