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:
Aug. 23, 2005
Filed:
Jun. 02, 2003
Toyohiko Youan, Hirakata, JP;
Kentaro Watanabe, Hirakata, JP;
Eiichi Muramoto, Hirakata, JP;
Kazuyuki Yamazaki, Hirakata, JP;
Toyohiko Youan, Hirakata, JP;
Kentaro Watanabe, Hirakata, JP;
Eiichi Muramoto, Hirakata, JP;
Kazuyuki Yamazaki, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A ground drilling machine comprises a controller for automatically controlling the injection of working liquid according to the output signal output as a function of the rotating condition of the pilot head. When the pilot headis driven forward or backward, working liquid can be injected by switching the working liquid transfer valveso long as the pilot headis revolving in order to improve the digging efficiency, the soil delivering efficiency and the cooling efficiency of the machine. The injection of working liquid can be suspended when the direction of propelling the pilot headis shifted while stopping the revolution of the pilot headbecause no working liquid is required for delivering the dug soil and cooling the leading body. Thus, working liquid can be injected always at an optimal rate depending on the rotating condition of the pilot headto suppress any waste of working liquid and reduce the construction cost.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile