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
Method and apparatus for policy-based network access control with arbitrary network access control frameworks
Authenticating and off-loading IPTV operations from mobile devices to fixed rendering viewing devices
Digital image processing device and processing method thereof
System and method for investing public deposits
Use of endogenous promoters in genetic engineering of Nannochloropsis gaditana
Power or voltage oscillation damping in a power transmission system
Methods and systems for motion estimation with nonlinear motion-field smoothing
  Randomly Featured Patents
Multi-color biosensor for detecting luminescence sites on a substrate having a refractive optical element for adjusting and focusing at least two incident irradiation beams of different wavele
Resin-bonded graphite body for a dry battery and method of making the same
Combined handheld vacuum cleaner and mount
4,4,10,10-tetranitro-6,8-dioxatridecane-1,13-diol polyformal and method of preparation
Power head
Display unit and television receiver
Digital filter
Device for the variable control of the valves of internal combustion engines, more particularly for the throttle-free load control of 4-stroke engines
Glass tile
Addition of hydrogen and C2 to C4 hydrocarbons to the feed gas in the catalytic conversion of methane to higher molecular weight hydrocarbons