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:
May. 18, 1999
Filed:
Nov. 27, 1996
Teruo Kabeuchi, Amagasaki, JP;
Masaya Hattori, Amagasaki, JP;
Takashi Togawa, Amagasaki, JP;
Yukishige Yamada, Amagasaki, JP;
Shigeaki Okuyama, Amagasaki, JP;
Masao Nakagawa, Amagasaki, JP;
Siro Sugiyama, Amagasaki, JP;
Katsuhiko Mukuno, Amagasaki, JP;
Kazunori Tsujimoto, Amagasaki, JP;
Kubota Corporation, , JP;
Abstract
A propelling apparatus includes a plurality of propellant cylinders series-connected to each other to be propelled by receiving a pushing force from behind, joints for series-connecting the propellant cylinders, a propellant head connected to a forward-most end of the propellant cylinders to be pressed into the earth, a leader member constituting a leading end of the propellant head, the leader member being rotatable about an axis of the propellant head by receiving a driving force from a driving device. An inclined pressure-receiving face is formed at a forward portion of the leader member for receiving an earth pressure in association with the underground propelling movement of the propellant head and steering the propellant head toward the direction of application of the earth pressure to the pressure-receiving face. The joint includes a flexible joint which is pivotally flexible about a transverse axis extending normal to an axis of the propellant cylinder.