Title:
MOVABLE PASSAGE
Document Type and Number:
Japanese Patent JP2023183592
Kind Code:
A
Abstract:
To provide a movable passage capable of preventing wear of a sealing member sealing between an outside passage and an inside passage.SOLUTION: A tip passage 40 (an inside passage) is inserted in the inside of an intermediate passage 30 (an outside passage). A tip part 44 separated from the intermediate passage 30 of the tip passage 40 and a tip part 34 of the intermediate passage 30 are connected to each other over the entire circumference with a cylindrical and stretchable seal 70 which can be expanded/contracted in the longitudinal direction. Accordingly, a gap between the intermediate passage 30 and the tip passage 40 can be sealed with the stretchable seal 70 regardless of an overhanging amount L2 of the tip passage 40 with respect to the intermediate passage 30. As compared with the seal member radially sandwiched between an inner peripheral surface of the intermediate passage 30 and an outer peripheral surface of the tip passage 40, the stretchable seal 70 is not sandwiched therebetween so that the stretchable seal 70 can be hardly worn out.SELECTED DRAWING: Figure 2
Inventors:
ISHIHARA HIROMORI
SUGANUMA HIROAKI
AOKI YUSUKE
MASUDA YOSHIO
IMOTO KIYONORI
YAMAKAWA KOHEI
SANO HIROTAKA
DOJIRO MASAHIRO
TOSHIMORI MIKIO
FURUSAWA TAKASHI
SUGANUMA HIROAKI
AOKI YUSUKE
MASUDA YOSHIO
IMOTO KIYONORI
YAMAKAWA KOHEI
SANO HIROTAKA
DOJIRO MASAHIRO
TOSHIMORI MIKIO
FURUSAWA TAKASHI
Application Number:
JP2022097182A
Publication Date:
December 28, 2023
Filing Date:
June 16, 2022
Export Citation:
Assignee:
TOKAI RYOKAKU TETSUDO KK
NIPPON SHARYO SEIZO KK
JABARA KK
NIPPON SHARYO SEIZO KK
JABARA KK
International Classes:
B61B1/02; B61B1/00; B64F1/305
Attorney, Agent or Firm:
Patent Attorney Corporation Shinmei Century
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