Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Systems and methods for DC-to-DC converter control
System and method for converting biomass to ethanol via syngas
Bus controller for handling split transactions
Interferer region identification using image processing
System of providing an internet web site that assists medical professionals draft a letter of medical necessity or other documentation for transmission to a third party payer on behalf of a pa
Arrays of optical confinements and uses thereof
Method and system for modeling a common-language speech recognition, by a computer, under the influence of a plurality of dialects
  Randomly Featured Patents
Fan system
Vector velocity estimation using directional beam forming and cross correlation
Multi-lobed dental implant
Back rest
Methods of screening for risk of cancer using human lactoferrin DNA probe or primer
RF assembly with ground-plane slot between components and method therefor
Gun rest
Spacer reciever for a wall form tie rod
Folding treadmill exercise device
Magnetron sputter device having separate confining magnetic fields to separate targets and magnetically enhanced R.F. bias