Resources Contact Us Home
Method and tool for plugging a service connection in a gas main

Image Number 8 for United States Patent #6142166.

A tool and method for plugging a service connection to a gas main in preparation for removal of the service tee removes the perforator, mills the hole in the main to provide a smooth seat for a sealing plug, and inserts a gas-tight sealing plug into the hole. The tool of the invention is operable through a narrow "keyhole" excavation, which decreases the risk to service personnel and significantly reduces costs of repairing the excavation. In the preferred embodiment the tool is loaded with a milling bit and a sealing plug before attachment to the service tee. The tool head is engaged to the service tee in a gas-tight fit to prevent the escape of gas during the procedure, and an adapter plate is pivoted between three working positions to perform the three steps of the service connection plugging method. In the preferred embodiment a pneumatic gear motor drives a hexagonal driver bit actuated by a linear actuator located in the shaft of the tool, the driving bit providing the required mechanical interface with each of the accessories involved in each step of the procedure. A separate pneumatic motor pivots the adapter plate between working positions, and specialized adapter is provided at each working position of the adapter plate allowing the same actuators to be used for the perforator removal, milling and plugging operations.

  Recently Added Patents
Belt with light
Milk frother
Antenna module and wireless communication apparatus
Idle stop and go system and method for controlling thereof
Apparatus for counting particles in a gas
Article based on a composition containing a crosslinked blend of elastomers
  Randomly Featured Patents
System and method for processing test reports
System and method for securing on-line documents using authentication codes
Diagnosis and treatment of cancers using in vivo magnetic domains
Folding cell phone and other folding mobile terminal
Vibration damper
Semiconductor device including liner insulating film
Beacon docking system for automatically aligning a passenger loading bridge to a doorway of an aircraft
Aspirated ink jet printer head
Gaming machine having multi-ended pointer for quasi-deterministic play ("pick-a-prize")
Allylsulfoxide enzyme inhibitors