The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1987
Filed:
May. 24, 1985
Manfred Nussbaumer, Leonberg, DE;
Ed. Zublin Aktiengesellschaft, Stuttgart, DE;
Abstract
A method and apparatus for the underground installation of pipelines. The underground installation of pipelines is carried out by driving pipe sections into the ground. The earth is loosened at the driving face via a liquid jet, and the excess earth is transported away from the removal zone. Only so much of the earth that has been loosened and mixed with the liquid is removed, such that the removal zone is always completely filled with the earth-liquid mixture. The larger earth aggregates or obstructions in the ground are forced outwards. In this way, the driving face does not require any special support. A receiving device with entry orifices for the earth-liquid mixture is located behind a nozzle head provided for discharging the liquid jet. A sluice serves to pass the mixture into a removal pipe in a controlled manner.