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:
Dec. 04, 1984
Filed:
Oct. 12, 1983
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A method and apparatus for laying a pipeline in the underground. First, a pilot pipeline of small diameter is laid in the underground between a departure pit and an arrival pit. A cutter head having a cutter drum mounted thereto is attached to the trailing end of the pilot pipeline. By rotating the cutter drum, earth and sand is excavated and taken in inside the cutter drum where earth and sand is converted into a slurry state by injecting therein water through a water supply pipe mounted to the pilot pipeline. The slurried earth and sand is then discharged through a slurry discharge pipe mounted to the pilot pipeline to a tank provided in the arrival pit. By actuating a propulsion jack installed in the departure pit, the cutter head is propelled into the underground and then a pipe to be laid is connected to the rear end of the cutter head. By repeating the excavation and the propulsion steps, a pipeline of a larger diameter is laid in the underground.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile