Resources Contact Us Home
Forming a passageway through the ground

Image Number 4 for United States Patent #5129760.

A method of forming a passageway (P) through the ground by inserting into the ground a structure (1) comprising a superstructure (3) and a substructure (2). The superstructure (3) is inserted into position in the ground, and the substructure (2) is urged into the ground beneath the superstructure (3), the ground being excavated as the substructure is inserted so as to form the passageway (P) bounded by the superstructure and the substructure.

  Recently Added Patents
Organic light emitting display device and method of manufacturing the same
Reverse mapping method and apparatus for form filling
Once daily formulations of tetracyclines
Software execution management apparatus, method, and computer-readable medium thereof
Method and system of channel detecting and reporting, terminal, and management center
Systems and methods for providing live voicemail to a mobile handset
Power device and method of packaging same
  Randomly Featured Patents
wc-Disposable bags
Over-heat protection for a portable space heater with thermally insulated thermostat mounted above slot cut in reflector
Metal inks, methods of making the same, and methods for printing and/or forming metal films
Device for cleaning metal surfaces
Method for manufacturing a semiconductor circuit system
Personalized photo album
Aqueous fuel for internal combustion engine and method of combustion
Method and apparatus for applying glaze or other coatings to food products
Method for producing thermoplastic resin, polyester resin and polycarbonate resin, and their applications
High-frequency treatment tool for endoscope