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. 11, 1979
Filed:
Feb. 15, 1978
Applicant:
Inventors:
Taro Iwamoto, Hitachi, JP;
Shimon Ando, Hitachi, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228-9 ; 228 29 ; 219 / ; 21912431 ;
Abstract
A compact automatic pipe welding apparatus having a base member separable into three sections and having a welding unit, detecting unit and a driving unit which are distributed on the circumference of the base member at an equal distance from one another is suitable for use in welding work in limited space, as is the case of installation or repair of pipings in nuclear or chemical plant. For enhancing the welding precision, ring gears are provided for interlocking a plurality of clamping means for securing the base member to the pipe stably.