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:
Nov. 06, 1979
Filed:
Nov. 22, 1977
Seizo Kubota, Musashi-Murayama, JP;
Sato Kogyo Kabushiki Kaisha, Toyama, JP;
Abstract
A novel method of injecting a back filling injection material employed in a shield-forming process is described herein. A screw type injection pump with a hopper connected to its intake port is utilized. This pump is rotated in a reverse direction to intake a back filling material into said hopper through a delivery hose connected to its delivery port. The upper limit pressure and a lower limit pressure for the injection pump are set for injection of the back filling material. The injection pump is next rotated in its normal direction to inject the back filling material to a desired location through the delivery hose, and then, after completion of the injection filling of the back filling material, the injection pump is rotated in a reversed direction again to intake water through the delivery hose, thereby washing of the hose and the injection pump can be effected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile