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:
Oct. 29, 2002
Filed:
Nov. 19, 1998
Toshiyuki Sato, Takatsuki, JP;
Hideshige Homma, Takatsuki, JP;
Tamotsu Yamashita, Takatsuki, JP;
Gumpei Yokoyama, Osaka, JP;
SuIken Co., Ltd., Shiga, JP;
Abstract
The invention relates to an existing pipe cut-off method and slitting method, by which an existing pipe made of cast iron and steel can be cut off. With a cut-off method according to the invention, first, a part of an existing pipe is enclosed and sealed up by a seal-up housing in an airtight state, a cutting tool having a plurality of blades is accommodated in the corresponding seal-up housing in a state the cutting tool is attached to the abovementioned seal-up housing . Next, the cutting tool is fed toward the center of the abovementioned existing pipe while slitting the existing pipe by rotating the cutting tool by power of a prime mover, and the abovementioned existing pipe is cut off by the cutting tool by turning the abovementioned seal-up housing in the circumferential direction R of the existing pipe