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:
Mar. 14, 2023
Filed:
Jan. 13, 2021
Applicant:
Sekisui Chemical Co., Ltd., Osaka, JP;
Inventors:
Hiroshi Sugahara, Shiga, JP;
Tatsurou Baba, Shiga, JP;
Naoya Tsuda, Shiga, JP;
Masahiro Yamasaki, Tokyo, JP;
Assignee:
SEKISUI CHEMICAL CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 63/32 (2006.01); B29C 53/78 (2006.01); F16L 55/165 (2006.01); B29C 53/72 (2006.01);
U.S. Cl.
CPC ...
B29C 63/32 (2013.01); B29C 53/78 (2013.01); F16L 55/1655 (2013.01); B29C 53/72 (2013.01);
Abstract
A spiral pipe-forming apparatus includes a non-circular guide portion which is rotatable with respect to an apparatus frame around a rotary axis. The non-circular guide portion is configured to be applied to a peripheral surface of a preceding spiral pipe portion. An acting portion is configured to act such that the non-circular guide portion follows a peripheral surface of an existing pipe.