Method of reforming existing gas pipe by repairing joint portions thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 1992
Grant Date -
N/A
app pub date -
Jan 8, 1991
filing date -
May 16, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides a method of repairing the joint portions of an existing gas pipe by a repairing device which is movable inside the pipe under remote control. The repairing device can be moved into and out of the gas pipe through a work opening formed in an upper portion of the gas pipe by boring means with gas flowing through the pipe and free of the hazard of gas leakage. This reduces the labor required for forming the work opening to start the repair work and for restoring the work opening portion to complete the repair work, consequently assuring a shortened work period and a reduced cost.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully