Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DUCT BORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/070773
Kind Code:
A1
Abstract:
Provided is a duct boring device in which an indented valve seat formed in an inner surface of a neck portion can be brought into contact with a work valve body in a clean state without causing any trouble due to infiltration of machining dust generated as a result of boring, and which thereby is capable of maintaining a high degree of sealing performance. This duct boring device at least comprises: a housing 5 having a divided structure that is to be externally fitted, in a tightly sealed state, to a fluid duct 1; a work valve 3 equipped with a work valve body 31 that is brought into contact with and is separated from an indented valve seat 5i provided inside a neck portion 5d of the housing 5; and a boring machine 7 equipped with a cutter 72 that is inserted in the housing 5 and that bores a fluid duct 1 in a state of uninterrupted flow, wherein provided is a cylindrical part 75a that moves in such a manner as to be able to open and close an opening of the indented valve seat 5i inside the neck portion 5d.

Inventors:
NAKAZATO KENSUKE (JP)
Application Number:
JP2020/037707
Publication Date:
April 15, 2021
Filing Date:
October 05, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
COSMO KOKI CO LTD (JP)
International Classes:
B23B41/08; B23B47/34; B28D1/14; B28D7/02; F16L41/06; F16L55/00
Attorney, Agent or Firm:
SHIGENOBU Kazuo et al. (3-1 Kioi-cho, Chiyoda-k, Tokyo 94, JP)
Download PDF: